How to change Port of Squid Proxy Server
Squid proxy server runs on port 3128 by default. Changing squid proxy server port to a non-standard port is a good idea as it will protect your proxy server from abusers and hackers.
Method 1
You can use the sed command to replace the port number
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sudo sed -i 's/^http_port.*$/http_port NEW_PORT_HERE/g' /etc/squid/squid.conf |
In the above command, replace NEW_PORT_HERE with the port number you need.
For example, to run squid proxy on port 5555, run
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sudo sed -i 's/^http_port.*$/http_port 5555/g' /etc/squid/squid.conf |
Now restart Squid Proxy server
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sudo systemctl restart squid |
If you have a firewall, you will need to open the port in the firewall.
Method 2: Manual Configuration Change
Edit Squid configuration file with vi or nano editor.
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sudo vi /etc/squid/squid.conf |
In the file, find http_port, it should look like
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http_port 3128 |
Change 3128 to whatever port number you like. Save and exit the editor.
Restart Squid Proxy server with the command
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sudo systemctl restart squid |
Open Port in firewall
If you have a firewall, you need to open the port in the firewall.
CentOS/AlmaLinux/RHEL
If you are using firewalld, you can use the command
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sudo firewall-cmd --permanent --zone=public --add-port=8000/tcp sudo firewall-cmd --reload |
Replace 8000 with your squid prox port.
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