Installation behind a firewall

1. Download `tsocks`:

   wget http://sourceforge.net/projects/tsocks/files/latest/download
   mv download tsocks.tar.gz

2. Tranfer tsocks.tar.gz on the remote host

3. Configure tsocks with the proper directory for the tsocks.conf file:

   tar -zxvf tsocks.tar.gz
   cd tsocks-*
   ./configure --with-conf=${PWD}/tsocks.conf

4. Create the tsocks.conf file with the following content:

   server = 127.0.0.1
   server_port = 10000

5. Create the tsocks library:

   make

6. Start a tsocks ssh tunnel:

   ssh -fN -D 10000 user@external-server.com

7. Add the libtsocks.so.1.8 to the LD_PRELOAD environment variable:

   export LD_PRELOAD="${PWD}/libtsocks.so.1.8"

8. Create a custom curl command to set the tsocks option: open a file named curl, which is accessible from your PATH environment variable before the real curl command, and fill this file with:

   #!/bin/bash
   /usr/bin/curl --socks5 127.0.0.1:10000 $@