https://aspenever.amebaownd.com/posts/19173148. In this tutorial, we will learn how to install and configure the squid proxy and caching server on Ubuntu Linux. The term proxy is generally combined with two different terms, one is forward proxy and the other is reverse proxy.

Mar 30, 2021 It is available for install on many Linux distributions like Ubuntu 16 in this guide, but also on Debian 8 and CentOS 7 systems. HAProxy is particularly suited for very high traffic websites and is therefore often used to improve web service reliability and performance for multi-server configurations. I need to set proxypass for some specific loacation. Locally in react I'm using proxy-middleware and my config looks like this app.use( '/firebase';, createProxyMiddleware(.

Jun 18, 2021 In this guide, we will show you how to install Centrifugo on Ubuntu 20.04 server. A server running Ubuntu 20.04. A root password is configured on the server. Getting Started. Before starting, you will need to update your system packages to the latest version. You can update them using the following command: apt-get update -y. When selecting a computer system for use as a dedicated Squid caching proxy server for many users ensure it is configured with a large amount of physical memory as Squid maintains an in-memory cache for increased performance. At a terminal prompt, enter the following command to install the Squid server: sudo apt install squid.

Most of the time when we talk about proxy it generally refers to forward proxy. A forward proxy server works on behalf of clients and hide the client IP address from the internet.

A reverse proxy server is the exact opposite of a forward proxy server. Reverse proxy server is worked behalf of the server and protects servers from the outside world.

Today we are going to configure forward proxy on Ubuntu using Squid3. To install and configure Squid on Ubuntu Server 16.04, we have to take the following steps:

Install the squid3 package.
Configure web caching.
Configure Access Control List(ACL).

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We can easily install Squid as usual from the Ubuntu software repositories. Open the command line and install squid3 package.

Open the /etc/squid/squid.conf file:

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Uncomment the cache_dir directive to add a disk cache directory:

Restart the Ubuntu squid server:

Squid server by default listens to TCP port 3128, So Make sure that you have allowed the TCP port 3128 on your firewall.

The default cache size is 100MB. To change cache size edit the cache_dir directive. The following example sets squid cache size to 500MB:

Control Access to the Ubuntu Proxy server with Access Control List (ACL)

You can limit users’ ability to browse the Internet with access control lists (ACLs). by default, the Ubuntu Squid.conf file is configured with ACL lines that will deny access to everything except the localhost. So now we need to set the list of IP addresses allowed to use squid.

Following example will allow IP address 192.168.1.10 to connect to the internet through the proxy server.

Add the following line at the bottom of the acl section of /etc/squid/squid.conf (under the TAG: acl):

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Then, add the following line at the top of the http_access section of the /etc/squid/squid.conf (under the TAG: http_access):

Finally, Restart the squid server:

In the above example, we added IP address 192.168.1.10 to the ACL group called allow_clients.

Then, we enabled http access to the allow_clients group.

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Now the client with IP address 192.168.1.10 can browse the internet through the Ubuntu proxy server.

You can add multiple IPs to the ACL group as follows:

Manage Squid Proxy Server

You can manage squid on Ubuntu with systemctl command. To view server status, Type:

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To start the squid service, Type:

https://aspenever.amebaownd.com/posts/19173156. Set squid server to start at system reboot (default):

Run netstat command to make sure that the squid is listening on port 3128:

Summary

In this tutorial we learned squid proxy server configuration in Ubuntu step by step.

We start by installing the Squid3 package on Ubuntu.
Once the squid3 is installed, we edit the configuration file to enable web caching by uncommenting the cache_dir directive.
Then, we learned how to control access to the proxy server with Access Control List (ACL).