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Linux system wide proxy settings

One  of the biggest mishaps in your sysadmin or researcher career is when you are forced to use proxy. This way simple things became complex and complex things impossible.

User settings via environment variable in your .bashrc

If you are lucky your application might work with proper environment settings. Please note that large corporations might have several proxies with some more permissive then others. You need to find the one that works for you.

Use the following commands to configure your proxy for http and ftp traffic on the command line

export http_proxy=http://<proxy host or IP>:<proxy port >
export ftp_proxy=http://<proxy host or IP>:<proxy port >

If your proxy requires login/authentication, you can use the format:

export http_proxy=http://username:password@:<proxy host or IP>:<proxy port >

To have this applied every time you log in, place these lines in your .bashrc in your home (~) directory.

export http_proxy=http://<proxy host or IP>:<proxy port > 
export ftp_proxy=http://<proxy host or IP>:<proxy port >

System-Wide Proxy Settings can be set in your /etc/profile

Procedure is the same as in your home directory. Please note that your home directory setting  in .bashrc will overwriting system wide setting in /etc/profile as your bashrc file will be sourced after /etc/profile.

Some applications and commands will not pick up the system wide proxy settings, so you have to configure each program you use. Below are some common examples.

Firefox

Occasionally, Firefox does not pick up the operating system proxy setting. You can manually set up the Firefox proxy in Options menu. Go to Options > Advanced > Settings.

Yum Package Manager

yum proxy settings can be found in the file system at /etc/yum.conf

If they do not exist yum tries to use setting from the environment.

Add a line to the file with the following information:

proxy=http://<proxy IP>:<proxy port >

The next time you run yum, it will pick up that proxy.

See also


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RedHat RHEL 6 system wide proxy settings

April 27, 2012

When you need to have proxy connection available to whole system, so dont bother with settings for firefox, yum proxy and similar, its simple as just plain file

Just copy & paste following code to terminal window. if you need other shell , like csh , just add another file with csh extension.

This should work for every user on system.

/bin/cat <<EOF > /etc/profile.d/proxy.sh
export http_proxy=http://host.name:port/
export ftp_proxy=http://host.name:port/
export HTTP_PROXY=http://host.name:port/
export FTP_PROXY=http://host.name:port/
export no_proxy=.localdomain.com
EOF

In case , that you want enable proxy access to only specific user, just add lines to his bash-profile file

echo "export http_proxy=http://hostname.or.ip:port" >> /user_home/.bash_profile > hope it helps

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