Proxy settings system wide for Linux Operating Systems

 
 The six (6) simple steps to set the system wide proxy settings,

Step 1: Installing redsocks 

1. Firstly, download the following files: red sock file for 64 bit: redsocks_0.4+dfsg-1_amd64.deb and for 32 bit: redsocks_0.4+dfsg-1_i386.deb 
2. Install redsocks with the command:
• for 64 bit: $ sudo dpkg -i redsocks_0.4+dfsg-1_amd64.deb
• for 32 bit: $ sudo dpkg -i redsocks_0.4+dfsg-1_i386.deb  

Step 2: Installing iptables 

1. install iptables-persistent with the command
• $ sudo apt-get install  iptables-persistent

Step 3: Configuring the redsocks
Create an empty file for redsocks.conf with the path /etc/redsocks.conf as $ sudo /etc/redsocks.conf
Copy the below code into it and also set your login and password

base {
    log_debug = off;
    log_info = off;
    log = "syslog:daemon";
    daemon = on;
    user = redsocks;
    group = redsocks;
    redirector = iptables;
}

redsocks {
    local_ip = 127.0.0.1;
    local_port = 5123;

    ip = 10.201.13.50;
    port = 80;

    type = http-relay;

    login = "user";
    password = "password";
}

redsocks {
    local_ip = 127.0.0.1;
    local_port = 5124;

    ip = 10.201.13.50;
    port = 80;

    type = http-connect;

    login = "user";
    password = "password";
}


Step 4: Configuring the rules v4
Create an empty file for rules.vs with the path /etc/iptables/rules.v4 as $ sudo /etc/iptables/rules.v4

Copy the below code into it,

*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A OUTPUT -d 10.0.0.0/8 -j RETURN
-A OUTPUT -d 127.0.0.0/8 -j RETURN
-A OUTPUT -d 192.168.0.0/16 -j RETURN

 
-A OUTPUT -p tcp --dport 443 -m tcp -j REDIRECT --to-ports 5124
-A OUTPUT -p tcp -m tcp -j REDIRECT --to-ports 5123
-A OUTPUT -p udp -m udp -j REDIRECT --to-ports 5123
COMMIT


Step 5: Setting startup variable to Yes

Change the startup variable to "yes" in the  /etc/defaults/redsocks.

Step 6: Final step
Remove proxy settings at browser or anywhere if you set up early and then restart the system. 


If you need any further help, please comment it below.