If you have a server at hand and wish to set up a proxy in order to help the Iranian people bypass censorship and net filters, I recommend squid.

For Windows, use the instructions here.

For Mac, use the instructions here.

For a Debian based Linux system use the following commands:

sudo apt-get install squid
sudo nano -w /etc/squid/squid.conf

(if nano is not installed, try the vi editor or install nano with sudo apt-get install nano)

in the nano editor, search (ctrl+w) for “http_access deny all” and replace the line with the following lines:

acl TRUSTED src 62.60.128.0/17 62.193.0.0/19 62.220.96.0/19 77.36.128.0/17 77.77.64.0/18 77.104.64.0/18 77.237.64.0/19 77.237.160.0/19 77.245.224.0/20 78.38.0.0/15 78.109.192.0/20 78.110.112.0/20 78.111.0.0/20 78.154.32.0/19 78.157.32.0/19 78.158.160.0/19 79.127.0.0/17 79.132.192.0/19 79.170.144.0/21 79.175.128.0/18 80.66.176.0/20 80.69.240.0/20 80.71.112.0/20 80.75.0.0/20 80.191.0.0/16 80.242.0.0/20 80.253.128.0/20 80.253.144.0/20 81.12.0.0/17 81.28.32.0/20 81.28.48.0/20 81.31.160.0/20 81.31.176.0/20 81.90.144.0/20 81.91.128.0/20 81.91.144.0/20 82.99.192.0/18 82.115.0.0/19 83.147.192.0/18 84.47.192.0/18 84.241.0.0/18 85.9.64.0/18 85.15.0.0/18 85.133.128.0/17 85.185.0.0/16 85.198.0.0/18 86.109.32.0/19 87.107.0.0/16 87.247.160.0/19 87.248.128.0/19 89.144.128.0/18 89.165.0.0/17 89.221.80.0/20 89.235.64.0/18 91.98.0.0/15 91.184.64.0/19 91.186.192.0/19 91.206.122.0/23 91.208.165.0/24 91.209.242.0/24 91.212.16.0/24 91.212.19.0/24 91.212.252.0/24 92.42.48.0/21 92.50.0.0/18 92.61.176.0/20 92.62.176.0/20 92.242.192.0/19 93.110.0.0/16 93.190.24.0/21 94.74.128.0/18 94.101.128.0/20 94.101.176.0/20 94.101.240.0/20 94.139.160.0/19 94.182.0.0/15 94.184.0.0/17 94.232.168.0/21 94.241.128.0/18 95.38.0.0/16 95.80.128.0/18 95.81.64.0/18 95.82.0.0/18 95.82.64.0/18 95.130.56.0/21 95.130.240.0/21 188.34.0.0/16 188.93.64.0/21 188.121.96.0/19 188.121.128.0/19 188.136.128.0/17 188.158.0.0/15 193.189.122.0/23 194.225.0.0/16 195.146.32.0/19 212.16.64.0/19 212.33.192.0/19 212.50.224.0/19 212.80.0.0/19 212.95.128.0/19 212.120.192.0/19 213.176.0.0/19 213.176.32.0/19 213.176.64.0/18 213.195.0.0/18 213.207.192.0/18 213.217.32.0/19 213.233.160.0/19 217.11.16.0/20 217.24.144.0/20 217.25.48.0/20 217.64.144.0/20 217.66.192.0/20 217.66.208.0/20 217.146.208.0/20 217.172.96.0/19 217.174.16.0/20 217.218.0.0/15

http_access allow TRUSTED

access_log none
cache_store_log none

and save the file. then restart the proxy with

sudo /etc/init.d/squid restart

the proxy will now allow people within an iranian IP range to use your server as a proxy to freely access the web and other HTTP based services. the last two lines prevent your server from logging users of your proxy. this saves resources and privacy.

via Austin Heap