What is Squid Proxy? Guide to Creating Proxy by Squid Quickly

In today’s digital world, protecting personal information and ensuring online privacy has become increasingly important. Squid Proxy is a crucial network tool that helps you achieve this goal. This article will provide you with a clear understanding of Squid Proxy, offer a quick guide on creating a proxy with Squid, and share important considerations when using this application.

What is Squid Proxy?

Squid Proxy, commonly referred to as “Squid,” is a popular and powerful open-source proxy server used to establish an intermediary connection between users and the Internet. Its primary function is to forward web requests from users to servers and then return responses from servers to users. In this process, Squid Proxy conceals the user’s identity and IP address, safeguarding personal information and enhancing online security.

Squid Proxy finds wide applications, including safeguarding personal information, bypassing geographical restrictions, and controlling Internet access in organizations and businesses, among many others. Importantly, Squid Proxy is flexible and can be customized to meet the specific needs of users and organizations.

What is Squid Proxy? Guide to Creating Proxy by Squid Quickly

Why Should You Use Squid Proxy?

Protect Personal Information

Using Squid Proxy helps protect your personal information from potential network threats. Your data is encrypted and secure when transmitted through the proxy connection, preventing potential attacks from third parties.

Bypass Geographical Restrictions

Squid Proxy allows you to change your IP address to that of another country. This enables you to access geographically restricted content or bypass network barriers imposed by specific countries.

Control Internet Access

For businesses, using Squid Proxy provides the capability to monitor and control employees’ Internet access. This ensures that Internet usage within the organization occurs safely and in compliance with regulations.

Accelerate Web Access

Squid Proxy offers the ability to temporarily store web content, minimizing page load times and accelerating access for users.

Reduce Load on the Internal Network

Squid Proxy can cache web pages, reducing Internet bandwidth and alleviating the load on internal networks, providing a smoother experience for users.

These reasons are just a few basic examples of why Squid Proxy is a valuable choice for many users and organizations. Depending on specific needs, Squid Proxy can offer various other benefits for your online experience.

Squid Proxy là gì Hướng dẫn tạo Proxy bằng Squid nhanh chóng — What is Squid Proxy? Guide to Creating Proxy by Squid Quickly

Quick Guide to Using Squid to Create Proxy

Squid is a popular and powerful open source proxy application. It offers many powerful and flexible features, making it an ideal choice for creating a proxy server. Below are basic instructions for creating a proxy using Squid

Request:

VPS: 1vCPU – 1GB RAM – 20GB HDD – 1 IPv4

Step 1

Start by updating the operating system, cleaning all buggy packages, and installing Squid from the CentOS repository.

yum update -y
yum clean all
yum -y install squid
systemctl start squid && systemctl enable squid
systemctl status squid

Step 2

# Disable firewalld
systemctl stop firewalld
systemctl mask --now firewalld

Step 3: Install the httpd-tools package to perform user authentication via web browser

# Install gói httpd-tools
yum -y install httpd-tools
touch /etc/squid/passwd
chown squid /etc/squid/passwd
cp /etc/squid/squid.conf /etc/squid/squid.conf.bak

Step 4: Configure Squid to act as a public proxy forwarder

vi /etc/squid/squid.conf

If the server has multiple IPs, you need to specify which IP to use for the squid and the port to connect to the squid server.

http_port 146.196.64.135:31280

Make sure that when Squid is enabled, it reads user information from the /etc/squid/passwd file and forces users to authenticate when logging into the proxy.

auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd
auth_param basic children 5
auth_param basic realm Squid Basic Authentication
auth_param basic credentialsttl 2 hours
acl auth_users proxy_auth REQUIRED
http_access allow auth_users

Be sure to enable the DNS v4 option so that Squid prioritizes using IPv4 for traffic.

dns_v4_first on

Step 5: Create a user that allows login authentication via proxy.

Htpasswd uses MD5 encryption to encrypt the password string and saves it to the file /etc/squid/passwd.

htpasswd -b -m /etc/squid/passwd new_username new_passwd

After configuration is complete, install the Foxy Proxy utility on Firefox browser to test (on Chrome, you can use the SwitchyOmega Proxy extension which also has the same feature). Next, fill in the previously declared IP, Port, Username and Password information sequentially and select Save.

What is Squid Proxy? Guide to Creating Proxy by Squid Quickly

Notes when using Squid Proxy

When using Squid Proxy, please note the following:

Password security

Make sure that the password to access the proxy server is confidential and not disclosed to anyone.

Check logs regularly

Monitor proxy server activity logs to detect and prevent untrusted activities.

Updated frequently

Ensure that Squid Proxy and other related components are updated to the latest versions to ensure security.

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