The 502 Bad Gateway error is an HTTP status code that means that one server received an invalid response from another server. In more technical words, A 502 Bad Gateway means that the proxy (gateway) server wasn’t able to get a valid or any response from the upstream server.
If you are seeing a 502 bad gateway error on a website, it means that the origin server sent out an invalid response to another server that acted as a gateway or proxy. It can be a tricky investigation to locate what and where is the process which caused the issue. However, there are some general troubleshooting steps that you can follow to get it solved.
For example, if you use Nginx as the webserver and you encounter this issue, it could be that Nginx is unable to communicate with the upstream server, this upstream server could be PHP-FPM or other application that you want to access through Nginx, like Odoo, NodeJS, etc. (more…)
In this tutorial, we will show you how to create an SSH Tunnel using Putty and Firefox. SSH tunnel is an encrypted tunnel created through an SSH protocol. SSH Tunnel will be used to transfer unencrypted data over a network through an encrypted channel. If your service provider or some organization has blocked certain sites using their proxy filter you can bypass them with a SOCKS 5 proxy tunnel. In general, SOCKS is a protocol that establishes a TCP connection and exchanges network packets between a client and a server through a proxy server. If you can connect to an external SSH server, you can create an SSH tunnel to forward a port on your local machine to a port in the other machine which will be the other end of the tunnel.
Speeding up a website is a very important process because most of the visitors will leave a slow website and visit a competitor’s website instead of suffering a delay. Also, they would not return to a website with poor loading speed. A faster page load speed gives visitors a better user experience. The impact of website speed is huge on search engine rankings too. If you strive to achieve good rankings on search engines, make sure to optimize your website for speed. Before we start working on improving the website speed, it is a good idea to know what is an acceptable web page speed. In general, the best practice is around three seconds.
Mahara is a free and open-source electronic portfolio management system written in PHP. It is a web-based application mainly used in academic institutions to provide a platform to share their knowledge. It helps you to create a digital classroom and organize a student’s progress. You can also create a blog, build a resume, file repository, and a competency framework using Mahara. Compared to other Learning Management Systems, Mahara is distributed and user-focused.
Elasticsearch is an open-source platform for full-text search and analytics engines. It allows you to store, search, and analyze a large amount of data in real-time. It is a popular search engine designed for applications that have complex search requirements. With Elasticsearch, you can build a complex search functionality similar to the Google search engine.