How to get Internet on a server using Squid Proxy and SSH port forwarding

Do the setup as follows:

Setup on Host A:

1. Install proxy server Squid on Host A . By default Squid listens on port 3128.
   yum install squid
2. Comment the http_access deny all then add http_access allow all in /etc/squid/squid.conf
3. If Host A itself uses some proxy say 10.140.78.130:8080 to connect to internet then also add that proxy to /etc/squid/squid.conf as follows: refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880 cache_peer 10.140.78.130 parent 8080 0 no-query default never_direct allow all

Setup on Host B:

1. Add the following entries to /etc/environment export http_proxy=http://127.0.0.1:3129 export https_proxy=http://127.0.0.1:3129
2. source /etc/environment

Now our setup is complete.

Creating SSH tunnel with Remote port forwarding

1. Run the follwoing SSH command from Host A
   ssh -R 3129:localhost:3128 user@HostB
2. This will allow Host B to access the internet through Host A.

Checking the internet:

1. Run the following command from Host B
   wget https://google.com

Traffic flow diagram :