{"id":723,"date":"2026-08-11T15:10:09","date_gmt":"2026-08-11T14:10:09","guid":{"rendered":"https:\/\/hostpro.com\/blog\/?p=723"},"modified":"2026-08-11T15:10:09","modified_gmt":"2026-08-11T14:10:09","slug":"localhost-isnt-working-causes-and-solutions","status":"publish","type":"post","link":"https:\/\/hostpro.com\/blog\/guides-how-tos\/localhost-isnt-working-causes-and-solutions\/","title":{"rendered":"Localhost Isn&#8217;t Working \u2013 Causes and Solutions"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The message \u201cLocalhost refused the connection\u201d indicates that the server was unable to establish an internal connection with the required service that processes user requests.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are two main errors that cause the browser to display the \u201cLocalhost refused the connection\u201d message:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ERR_CONNECTION_REFUSED <\/strong>\u2013 the server rejected the connection request.<\/li>\n\n\n\n<li><strong>ERR_CONNECTION_TIMEOUT <\/strong>\u2013 the server did not respond to the request within the specified time.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This may be due to issues with the web server, database, or another component responsible for the website\u2019s operation. In this article, we\u2019ll examine the most common causes of this issue and how to resolve them.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"529\" src=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-1024x529.png\" alt=\"Localhost isn\u2019t working\u2014how to fix the problem | Wiki HostPro\" class=\"wp-image-725\" srcset=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-1024x529.png 1024w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-300x155.png 300w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-768x396.png 768w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-1536x793.png 1536w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Common Causes of the \u201cLocalhost Rejected Connection\u201d Error and Their Solutions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The \u201cLocalhost Rejected Connection\u201d error means that one of the website\u2019s services is attempting to connect to another local service via the address 127.0.0.1 or localhost, but the connection fails. This can result in the website being partially or completely inaccessible, as well as malfunctions in scripts or APIs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This can cause:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>errors when opening pages;<\/li>\n\n\n\n<li>script malfunctions;<\/li>\n\n\n\n<li>interaction issues between website components.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Below, we\u2019ll look at common causes and steps to resolve this error.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Port Conflicts and Local Services<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When a browser displays the error \u201cLocalhost rejected the connection,\u201d one of the most common causes is a lack of response from the local web server. This is often due to the fact that the relevant service (such as <a href=\"https:\/\/hostpro.com\/blog\/hosting\/apache-nginx-or-a-combination-which-is-best-for-your-hosting\/\">Apache, Nginx<\/a>, or another server that should be handling the request) is not running or is not listening on the expected port.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By default, the local web server runs on port <strong>80 (for HTTP)<\/strong> or <strong>443 (for HTTPS)<\/strong>. In development environments, other ports are often used as well: 3000, 8000, 8080, and so on. If a request is sent to one of these ports but no service is handling it, or if the port is already occupied by another process, the browser will not receive a response to the request, resulting in a connection refusal error.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To determine whether a specific port on your computer is in use, as well as which process is using it, you need to run special commands in the appropriate operating system interface. This interface is called the command line or terminal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In Windows, the Command Prompt is used for this purpose.<\/strong> There are several ways to open it. The simplest is to press the Win + R keys, type cmd in the \u201cRun\u201d window, and press Enter. You can also find it through the Start menu by typing \u201cCommand Prompt\u201d or \u201ccmd\u201d in the search bar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is recommended to run the Command Prompt as an administrator so that you have all the necessary permissions to execute system commands. To do this, right-click on \u201cCommand Prompt\u201d in the search results and select \u201cRun as administrator.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this window, you can run the following command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># netstat -aon | findstr :80<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This command will show whether port 80 is being listened to and display the process ID (PID) of the process using it. If the port is in use, you\u2019ll find out which process is using it. Next, you can enter:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># tasklist | findstr &#91;PID]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">where [PID] is the process ID you obtained in the previous step. This command lets you find the name of the program occupying the port.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For greater convenience, you can use the <strong>TCPView graphical utility<\/strong> from Microsoft Sysinternals. It provides a visual interface for viewing open ports and processes in real time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In Linux, ports and processes are checked via the terminal<\/strong>\u2014a text-based command-line interface. You can open it through the application menu or using a keyboard shortcut (for example, Ctrl + Alt + T).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To identify which processes are listening on a specific port (for example, 80), you can use the command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># lsof -i :80<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">or a more versatile command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># ss -tulpn | grep :80<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Another popular option is the command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># netstat -ntlup | grep :80<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This command displays information about ports listening on TCP\/UDP, including the processes and their PIDs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you need to free up a port, you can terminate the corresponding process using the following command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># kill -9 &#91;PID]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">where [PID] is the process ID of the process you want to terminate.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Important recommendations! <\/strong>Always exercise caution when terminating processes to avoid interrupting critical system services. After a reboot or automatic restart, some services may reoccupy the same port, so to fully resolve the conflict, it is recommended to make changes to the configuration files of the relevant programs.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Server Malfunction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The service responsible for handling requests (e.g., Apache, Nginx, MySQL, PHP-FPM, or another local web component) is not running or is malfunctioning. In this case, an attempt to connect to localhost (for example, 127.0.0.1:80 for a web server or 127.0.0.1:3306 for MySQL) will fail.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This can occur if:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>the service was stopped manually or due to a system error;<\/li>\n\n\n\n<li>a configuration error occurred during startup;<\/li>\n\n\n\n<li>the process crashed due to a lack of resources or overload.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">As a result, other parts of the site that rely on this service cannot establish a connection, which causes the \u201cLocalhost rejected the connection\u201d error.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">First, you need to determine which service is responsible for handling local connections. This could be a web server (Apache, Nginx, <a href=\"https:\/\/hostpro.com\/blog\/hosting\/uncover-the-incredible-functions-of-litespeed\/\">Litespeed<\/a>), an interpreter (e.g., PHP-FPM), a database (MySQL, PostgreSQL), or any other local component. If it is inactive, requests from localhost cannot be processed, and the system will return an error indicating that the connection was rejected.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\/\/LINUX<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To check the status of services on Linux, use the following command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># systemctl status apache2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Or substitute the name of another service, for example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># systemctl status httpd \u2013 another command to check Apache\n\n# systemctl status nginx\n\n# systemctl status mysql\n\n# systemctl status php8.1-fpm<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Please note! If the response shows that a service has a status of \u201cinactive,\u201d \u201cdead,\u201d \u201cfailed,\u201d or is not running at all, that is the source of the problem.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"219\" src=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-2-1024x219.png\" alt=\"\" class=\"wp-image-726\" srcset=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-2-1024x219.png 1024w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-2-300x64.png 300w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-2-768x164.png 768w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-2.png 1165w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">To get it running again, simply try starting it manually:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># systemctl start apache2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">After starting it, check the status again to make sure the output shows \u201cactive (running)\u201d and that no errors are listed.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"765\" height=\"310\" src=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-3.png\" alt=\"Checking Apache, nginx, and Litespeed Configurations When Connecting to Localhost | HostPro \" class=\"wp-image-727\" srcset=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-3.png 765w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-3-300x122.png 300w\" sizes=\"auto, (max-width: 765px) 100vw, 765px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If the service fails to start (for example, it terminates immediately or displays an error), you\u2019ll need to review the system logs. They\u2019ll indicate the exact cause of the failure. Most often, this is due to an incorrect configuration, a port conflict, or a lack of resources:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># journalctl -xe<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Or review the log files for a specific service, for example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># less \/usr\/local\/apache\/logs\/error_log<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># less \/var\/log\/httpd\/error.log<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Please note! <\/strong>The paths to log files may vary depending on the operating system, Linux distribution, service installation method (via a package manager, compilation from source, or a control panel), as well as the specific version.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">The most common paths to Apache error logs:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/usr\/local\/apache\/logs\/error_log<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/usr\/local\/apache\/error_log<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/var\/log\/httpd\/error_log<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The most common paths to NGINX logs (error logs):<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/var\/log\/nginx\/error.log<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The most common paths to MySQL \/ MariaDB logs:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The error log can be located using the following command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># mysqladmin var | grep log_error<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">By default, it may be missing or located in:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/var\/log\/mysql\/error.log<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/var\/log\/mysqld.log<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If the logs are not present at the specified path, use the `<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">find<\/mark>` command or check the relevant settings in the configuration files (for example, `<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">ErrorLog<\/mark>` for Apache, `<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">log_error<\/mark>` for MySQL).<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># find \/ -name \u201cerror.log\u201d<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If changes have been made to the configuration files (e.g., httpd.conf, my.cnf, nginx.conf), you should check them for syntax errors before restarting:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># apachectl configtest<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># nginx -t<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># mysqld --validate-config<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Checking the Apache Configuration<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Additionally, let\u2019s take a separate look at verifying the Apache configuration. To ensure that Apache\u2019s configuration files do not contain syntax errors, it is recommended to run a configuration test before restarting the service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Standard command (if Apache is installed system-wide):<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># httpd -t<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Or<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># apache2ctl configtest<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Alternatively:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># apachectl configtest<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">A successful response should look like this:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Syntax OK<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019re using a custom Apache installation (for example, with the CWP control panel):<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the Control Web Panel (CWP), Apache is typically installed in a separate directory\u2014<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">\/usr\/local\/apache<\/mark>. In this case, use:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \/usr\/local\/apache\/bin\/httpd -t<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">or<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \/usr\/local\/apache\/bin\/apachectl configtest<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">These commands check the web server\u2019s configuration independently of the system\u2019s httpd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the service fails to start due to insufficient memory or an exceeded process limit, check the server\u2019s load:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># free -m<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># top<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Then free up resources or optimize the autostart settings for other services.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also, make sure the service is configured to start automatically at system boot to prevent the error from recurring after a server restart:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># systemctl enable apache2<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\/\/Windows<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the system is running on Windows, the principle remains the same: the \u201cLocalhost rejected the connection\u201d error occurs when the required local service is not running or has stopped due to an error.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To ensure that the necessary web server or database services are running, use the standard Windows Services Manager:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Press Win + R, type <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">services.msc<\/mark>, and press Enter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the list, locate the services that correspond to your environment.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Please note! <\/strong>Service names may vary depending on the software installed.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re using local development packages, such as WAMP, XAMPP, or OpenServer, the services may have different names, for example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">wampapache64<\/mark> (Apache in WAMP);<\/li>\n\n\n\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">xamppapache<\/mark> (Apache in XAMPP);<\/li>\n\n\n\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">nginx<\/mark> (if Nginx is installed).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019re unsure of the service name, check your environment\u2019s documentation or search for the service using the filter in the service manager.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you\u2019ve found the service you need in the list, check its status, which is displayed in the corresponding column. If the status next to the service is <strong>\u201cRunning,\u201d<\/strong> it means the service is active and ready to handle connections. If the status is blank or marked as <strong>\u201cStopped,\u201d<\/strong> this indicates that the service is currently not running, and this may be the cause of the \u201cLocalhost rejected the connection\u201d error.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To start the service, right-click on it and select <strong>\u201cStart.\u201d<\/strong> This will launch the necessary web server, database, or other service responsible for local connections. If the service is already running but you suspect it\u2019s not working properly, you can restart it. To do this, right-click the service and select <strong>\u201cRestart.\u201d<\/strong> Restarting will refresh the process and help resolve temporary glitches or freezes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s also important to check the service\u2019s startup type. To ensure that the required service starts automatically after the computer restarts, open the service\u2019s properties and make sure that the \u201cStartup type\u201d field is set to \u201cAutomatic.\u201d If a different value is selected, change it to avoid recurring issues with service availability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A firewall is blocking the connection<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Another common reason for being unable to connect to localhost may be that the port or the process itself is being blocked by the system firewall. On Windows, this could be the built-in \u201cWindows Defender Firewall\u201d or third-party antivirus software with its own firewall. If a service, such as Apache or MySQL, uses a port that is restricted or blocked for incoming or outgoing connections, an attempt to access localhost will result in an error. A similar situation is possible on Linux systems\u2014<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark>, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">firewalld<\/mark>, or <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">nftables<\/mark> may have active rules restricting access to certain ports, such as 80, 443, or 3306.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To verify that you have correctly identified the problem, open \u201cWindows Firewall with Advanced Security\u201d on Windows and review the rules for incoming and outgoing traffic\u2014check whether connections are allowed for the desired program or port.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On Linux systems, local connections may also be blocked at the system firewall level. The most common tools for managing rules are <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark>, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">firewalld<\/mark>, and <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">nftables<\/mark>. To check active rules, you can use one of the following commands:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># iptables -L -n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># firewall-cmd --list-all<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># nft list ruleset<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If the output of these commands shows DROP or REJECT rules for the desired port (for example, 80 or 3306), this may be the reason for the connection failure. In this case, you should modify or remove the corresponding rule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Servers with control panels or specific configurations may have additional security measures installed, such as CSF (ConfigServer Security &amp; Firewall). CSF integrates with <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark> and adds its own rules\u2014you can view them using:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># csf -l<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s also possible that access is being blocked by a web application firewall, such as ModSecurity. In this case, suspicious or high-volume local requests may be flagged as a potential attack and automatically blocked. To check, review the ModSecurity logs:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/usr\/local\/apache\/logs\/modsec_audit.log<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/var\/log\/httpd\/modsec_audit.log<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">or other paths, depending on the distribution and configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In general, it\u2019s a good idea to check all filtering levels\u2014from basic system firewalls to third-party security solutions that might be blocking necessary ports or IP addresses without the administrator\u2019s knowledge.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Please note! <\/strong>For temporary testing, you can also completely disable the firewall and check if the problem goes away. However, it\u2019s important to remember: disabling the firewall is only a diagnostic step, and under no circumstances should you leave the system without active protection after testing.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Temporarily Disabling the Firewall in Linux<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Linux, the method for disabling the firewall depends on which firewall is being used. Most commonly, these are <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">firewalld<\/mark>, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark>, or <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">nftables<\/mark>. If <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">firewalld<\/mark> is active on the server, it can be stopped via <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">systemd<\/mark>\u2014after which all blocking rules will be suspended until the service is restarted. In the case of <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark>, temporarily disabling it usually involves resetting the rule tables to zero, which also allows you to verify whether the rules are the source of the problem. If <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">nftables<\/mark> is being used, simply unloading the active <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">ruleset<\/mark> is sufficient.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep in mind that after a system reboot or restart of the firewall service, the rules may be reactivated, so this is a temporary solution intended solely for testing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Certain firewall solutions, such as CSF (ConfigServer Security &amp; Firewall) and ModSecurity, can also block local connections; therefore, for a thorough diagnosis, you should disable them separately or check their impact on traffic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CSF (ConfigServer Security &amp; Firewall) is a popular firewall for Linux servers that runs on top of <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark>. To temporarily disable CSF:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># csf -x<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This command completely stops CSF and removes all its rules from <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">iptables<\/mark>. If you want to re-enable CSF later:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># csf -e<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Before disabling it, it\u2019s advisable to ensure you have direct access to the server, because if access is mistakenly blocked after re-enabling it, it may be impossible to restore the connection remotely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ModSecurity is a firewall that integrates with a web server (Apache, Nginx, or LiteSpeed). It can block requests\u2014even if the network ports are open\u2014if it deems them potentially malicious. To temporarily disable ModSecurity in Apache:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At the global configuration level (httpd.conf or via the control panel), change:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># SecRuleEngine Off<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Then restart Apache:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># systemctl restart httpd<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019re using cPanel, it\u2019s easier to disable ModSecurity via WHM: \u201cModSecurity Configuration\u201d \u2192 \u201cDisable ModSecurity\u201d for a <a href=\"https:\/\/hostpro.com\/billing\/\">specific domain<\/a> or globally.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To verify whether ModSecurity is blocking requests, you can check the logs:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/usr\/local\/apache\/logs\/modsec_audit.log<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/var\/log\/httpd\/modsec_audit.log<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">These logs will list the blocked requests, the reason for the block, and the corresponding Rule ID.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Temporarily Disabling the Firewall in Windows<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Windows, you can disable the firewall via the graphical interface or from the command line if you have administrative privileges. The standard method is through \u201cWindows Firewall with Advanced Security,\u201d where you can disable profiles for domains as well as for private or public networks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are also PowerShell commands that allow you to instantly disable all firewall policies. This lets you verify whether the security system is blocking the connection without having to search for a specific rule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f Note: After testing, be sure to re-enable the firewall so as not to leave the system vulnerable to external attacks. This is only a diagnostic step to pinpoint the connection issue.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Incorrect configuration of the hosts file<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One reason for a connection failure may be an incorrect configuration of the hosts file. The operating system uses this file to map domain names to IP addresses locally before querying DNS. If the entries in it are incorrect\u2014for example, if `localhost` does not point to `127.0.0.1`, or if a specific domain is mapped to the wrong address\u2014this can lead to errors when connecting to a local server or database.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Check the contents of the hosts file and ensure there are no incorrect entries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On Linux, the hosts file is located at:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/hosts<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">A typical correct configuration:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>127.0.0.1 localhost<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>127.0.1.1 your-hostname<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">In Windows, the file is located here:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>C:\\Windows\\System32\\drivers\\etc\\hosts<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The correct configuration looks something like this:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>127.0.0.1 localhost<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>127.0.0.1 mysite.local<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Please note!<\/strong> In Windows, the hosts file has no file extension. To edit it, you must run a text editor (such as Notepad) with administrator privileges; otherwise, you won\u2019t be able to save your changes.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">You should also check for duplicates or extra spaces\/characters in the lines, as this can affect how the entries are processed. If you\u2019re testing a website locally, make sure the domain you\u2019re using in your browser or scripts is listed in the hosts file and points to 127.0.0.1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After making changes to the hosts file, the system may continue to use cached DNS records, so it\u2019s recommended to clear the DNS cache to ensure the updated records take effect.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DNS Cache and the ERR_CONNECTION_REFUSED Error on localhost<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The ERR_CONNECTION_REFUSED error means that the browser attempted to connect to the server at 127.0.0.1 or localhost, but the connection was refused. This usually indicates that no server is running on the specified port, or that the connection is being blocked by local settings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s worth noting that the IP address 127.0.0.1 is a local loopback address that does not require DNS resolution. However, when using the name \u201clocalhost,\u201d the system must recognize it correctly, which usually happens via the hosts file. If this file has been modified or the DNS cache contains outdated data, resolution may not work properly. As a result, the browser may fail to find the correct IP address or may access it incorrectly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To rule out issues related to the DNS cache or incorrect localhost resolution, it is recommended that you clear the DNS cache. This will help update the mappings between domain names and IP addresses on your system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Windows, this issue is resolved by flushing the DNS cache. This completely clears cached entries that may have caused conflicts when accessing the local host. The command used for this in the system is:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># ipconfig \/flushdns<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">You must run this command in the command prompt with administrator privileges so that the system can apply the necessary changes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"593\" src=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1024x593.png\" alt=\"DNS Cache and the ERR_CONNECTION_REFUSED Error on localhost\u2014How to Fix the Problem | HostPro\" class=\"wp-image-724\" srcset=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-1024x593.png 1024w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-300x174.png 300w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-768x445.png 768w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image.png 1098w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">On Linux, the approach depends on which DNS caching service is being used\u2014for example, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">systemd-resolved<\/mark>, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">dnsmasq<\/mark>, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">nscd<\/mark>, or <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-highlight-color\">bind<\/mark>. To clear the cache, you usually need to restart the corresponding service or run a command that flushes the DNS tables.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to the operating system, the DNS cache can also be stored in browsers. Some browsers, such as Chrome, Edge, or Firefox, have built-in interfaces for clearing this cache. In certain cases, cached DNS records in the browser can prevent a local website or web interface accessible via 127.0.0.1 from loading correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To clear the DNS cache directly in the browser, enter one of the following addresses into the address bar:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Google Chrome:<\/strong> chrome:\/\/net-internals\/#dns<\/li>\n\n\n\n<li><strong>Microsoft Edge:<\/strong> edge:\/\/net-internals\/#dns<\/li>\n\n\n\n<li><strong>Firefox:<\/strong> about:networking#dns<\/li>\n\n\n\n<li><strong>Opera:<\/strong> opera:\/\/net-internals\/#dns<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Once you\u2019ve navigated to the corresponding page, click the button to clear the DNS cache.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Clearing the DNS cache is a simple yet effective step that allows you to quickly rule out one of the possible causes of a connection failure. If the issue persists after clearing the cache, you should investigate other levels of network interaction, such as the configuration of your local web server, firewalls, or the hosts file.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Browser-Specific Issues<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In some cases, the connection to a local or remote server is blocked at the browser level. One of the most common causes may be corrupted or outdated cached data, as well as cookies containing expired access tokens or incorrect session information. <strong>Clearing the cache and cookies allows you to eliminate this factor and rule it out as a potential cause.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Another common cause may be browser extensions\u2014especially those that deal with networking, security, or proxy servers. For example, ad blockers, VPN extensions, or even developer tools can affect a page\u2019s network interactions.<strong> To troubleshoot, try temporarily disabling all extensions, especially if the issue occurs in only one browser.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s also worth noting that some browsers (such as Chrome) have their own security policies regarding local access, mixed content, or self-connections (localhost to localhost). In some cases, this can cause connection errors, even if the server-side is functioning correctly. <strong>Therefore, it\u2019s important to test the site in different browsers to rule out the influence of a specific browser.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Automatic Redirection from HTTP to HTTPS in the Browser<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Modern browsers, particularly Chrome and Firefox, often automatically redirect HTTP requests to HTTPS. In local environments, this can result in a \u201cLocalhost rejected the connection\u201d error if the server is not configured to accept HTTPS requests.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In such cases, it\u2019s a good idea to try opening http:\/\/localhost in a browser that doesn\u2019t enforce HSTS policies or has HTTPS-only mode disabled. For example, in Chrome, you can manually remove the localhost entry from the HSTS policies, and in Firefox, you can disable the forced HTTPS policy in the privacy settings. If the connection is established after that, the problem is likely related to the browser\u2019s security policy rather than the server or DNS configuration.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Removing HSTS Policies in Chrome<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Google Chrome uses HSTS (HTTP Strict Transport Security), which automatically redirects HTTP requests to HTTPS. This can cause an error when accessing localhost if the local server is not configured to handle HTTPS requests. To resolve this issue, you must manually remove the localhost entry from the dynamic HSTS policy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chrome provides a special policy management tool for this purpose, available at:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>chrome:\/\/net-internals\/#hsts<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">In the \u201cDomain Security Policy\u201d section, enter \u201clocalhost\u201d in the field to remove the domain and apply the changes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"317\" src=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-4-1024x317.png\" alt=\"Localhost Not Working - Removing HSTS Policies in Chrome | HostPro blog\" class=\"wp-image-728\" srcset=\"https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-4-1024x317.png 1024w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-4-300x93.png 300w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-4-768x238.png 768w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-4-1536x476.png 1536w, https:\/\/hostpro.com\/blog\/wp-content\/uploads\/2026\/08\/image-4.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">After that, you\u2019ll need to restart the browser for the changes to take effect. This will prevent http:\/\/localhost from being automatically redirected to https:\/\/localhost and help you verify whether the issue was indeed related to Chrome\u2019s security policy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Disabling HTTPS-only mode in Firefox<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Firefox may also have a mode enabled that forces the use of HTTPS connections even for local resources, including localhost. This behavior can cause an error when attempting to open a local site that does not support SSL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To check whether this mode is the cause of the error, you can temporarily disable it. In the browser settings, go to the \u201cPrivacy &amp; Security\u201d section, find the \u201cHTTPS-only mode\u201d option, and select \u201cDo not enable HTTPS-only mode.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After making these changes, it is recommended that you restart your browser for the changes to take effect. This will allow you to load pages via a standard HTTP connection and determine whether the issue is specifically related to the forced use of HTTPS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The \u201cLocalhost rejected the connection\u201d error can occur for various reasons\u2014ranging from malfunctioning services and firewall blocks to incorrect settings in the hosts file or port conflicts. It\u2019s important to systematically check each potential factor, starting with diagnosing server and service activity, monitoring firewall access, and verifying the accuracy of local DNS records, and ending with checking the browser.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using basic commands to check open ports, analyze logs, clear the DNS cache, and properly configure the hosts file will help you quickly pinpoint the problem and resolve it. It\u2019s also important to consider the specific characteristics of different operating systems to correctly apply diagnostic and troubleshooting methods.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By following the recommendations described in this article, even users with basic knowledge will be able to successfully resolve the issue of being unable to connect to localhost and restore stable operation of local web services.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The message \u201cLocalhost refused the connection\u201d indicates that the server was unable to establish an internal connection with the required service that processes user requests.<\/p>\n","protected":false},"author":5,"featured_media":732,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-723","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides-how-tos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.3 - 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