Bandwidth limit exceeded error: how can I fix it?

Bandwidth limit exceeded error is often the most common web errors seen on cPanel powered websites. It happen often in the last days of the month, when lot of websites reach their bandwith limits. What does Bandwidth limit exceeded error mean? It means your website reached it’s bandwidth limit. The result is a suspension of the entire website, it doesn’t allow… Read more »

How to Specify a Vary: Accept-Encoding header in Nginx?

A few days ago I was working optimizing one of our company blogs. I was using a public performance test tool to find out which aspects of the web performance I needed to improve to get better speed. One of the bottlenecks I found was this warning: Specify a Vary: Accept-Encoding header What does this mean? This means the  web server… Read more »

How can I block IP ranges using CSF Firewall?

CSF Firewall is one of the most complete server security suites around. It can help you to harden the security of your cPanel server up to the max. CSF is an iptables based firewall, and as such, it allows the server administrator to block offending incoming connections. One of the advanced things it allows is the ability to block IP… Read more »

How can I calculate IP address on Specific CDIR Subnet Ranges?

In the web hosting world, the networking and IP stuff are present in the¿ day to day talking for most system administrators and developers. But some of them get confused about IP ranges and how many IPs are available on each CDIR range. Sometimes we can question ourselves about: How many ips are in a /24 range? How many ips… Read more »

How to Find Out Nginx Web Server Version

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How can I print Nginx web server version from the Linux terminal? In order to find out Nginx version, you need to pass the -v or -V options to the nginx binary: Example: nginx -v Output: [root@server.cpaneltips.com:~]nginx -v nginx version: nginx/1.11.7 The -v option passed to Nginx shows only the nginx version number, but we can get more details from… Read more »

Linux: How can I Restart Nginx WebServer?

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How can I restart nginx web server on Linux? In order restart nginx web server, you can use any of the next commands. Make sure you run this commands with root privileges: service nginx restart or /etc/init.d/nginx restart However, be aware that restarting Nginx webserver may interrupt all active connections. For this case, it is better to reload nginx, instead… Read more »

WordPress Error: The Jetpack server was unable to communicate with your site [HTTP 404]

A few days ago on of our customers reported that Jetpack stoppped working on his wordpress website. The exact error was: The Jetpack server was unable to communicate with your site [HTTP 404]. Immediately one thing came to my mind: this is happening because of some XML-RPC protections against attacks. How can I fix “The Jetpack server was unable to communicate with… Read more »