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#SIMPLE VPN SERVER SOURCE HOW TO#
#SIMPLE VPN SERVER SOURCE SOFTWARE#

The varnish is also extensible – it can be extended using Varnish Modules ( VMODs) and users can write their custom modules or use community provided modules. Varnish uses a flexible configuration language know as the Varnish Configuration Language ( VLC) which among other things enables system administrators to configure how incoming requests should be processed, what content should be served, and from where, and how the request or response should be altered, and much more. It is deployed between a client and an HTTP web server or application server every time a client requests for information or a resource from a web server, Varnish stores a copy of the information, so the next time the client requests for the same information, Varnish will serve it without sending a request to the webserver thus reducing the load on the server and in turn speeding up web content delivery.

#SIMPLE VPN SERVER SOURCE SOFTWARE#

Varnish HTTP Cache (or Varnish Cache or simply Varnish) is a free, open-source, high-performance, and very popular caching reverse-proxy software better known as a web application accelerator, designed to improve HTTP performance using server-side caching.

#SIMPLE VPN SERVER SOURCE HOW TO#

How to Install Nginx Web Server on Ubuntu 20.04.

Useful articles on Nginx web server you might like to read: Additionally, concerning security, it supports SSL/TLS termination and so many other security features. This makes your applications more robust, available and reliable, highly scalable, with response time and throughput. The ngx_http_upstream_module module allows for defining groups of backend servers to distribute the requests coming from clients. Importantly, it supports load balancing and fault tolerance which are vital aspects of large-scale distributed computing systems. NGINX supports accelerated reverse proxying with caching using the ngx_http_proxy_module module, which allows passing requests to another server over protocols other than HTTP, such as FastCGI, uwsgi, SCGI, and memcached. Just like HAProxy, NGINX has an event-driven architecture so it has no problem dealing with tens of thousands of concurrent connections, as it uses HAProxy’s PROXY protocol. NGINX is well known for its high performance, stability, rich feature set, simple and flexible configuration, and low resource consumption (particularly small memory footprint). It also functions as an IMAP/POP3 proxy server. NGINX, a free, open-source, high-performance, and very popular HTTP server and reverse proxy. Related Read: How to Setup HAProxy as Load Balancer for Nginx on CentOS 8 2.

Some of HAProxy’s basic features include proxying, SSL support, monitoring both server states and its own state, high availability, load balancing, stickiness(maintain a visitor on the same server even across various events), content switching, HTTP rewriting, and redirection, server protection, logging, statistics, and much more.

Notably, HAProxy uses the PROXY protocol to pass the client’s connection information to backend or origin servers so that an application gets all the relevant information. It is powered by an event-driven, non-blocking engine that combines a very fast I/O layer with a priority-based, multi-threaded scheduler which enables it to easily deal with tens of thousands of concurrent connections. It is also a protection against DDoS and service abuse.

HAProxy is an HTTP reverse-proxy, a TCP proxy and normalizer, an SSL/TLS terminator/initiator/offloader, a caching proxy, an HTTP compression offloader, a traffic regulator, a content-based switch, a FastCGI gateway, and more. HAProxy ( HAProxy, which stands for High Availability Proxy), a free, open-source, very fast, reliable, and top-notch load balancer and proxying software for TCP and HTTP-based applications, built for high availability.