Selecting which IP address to use for outgoing requests from behind a NAT

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Our organization has several external IP addresses. I am behind 2 layers of NAT and the servers choose which IP address to route my traffic to.

Can I specify which IP address to use when finally leaving the organizations network. I know that source routing can be done in IPv4 by adding some options in the header. But can I configure my PC to add these options automatically.

I have both a Windows and a Linux Machine.

Rohit Banga

Posted 2010-03-12T05:08:53.470

Reputation: 1 814

3Why does it matter which router you exit through? The only practical application for this that I can think of is getting past IP bans on one of the exits... – marcusw – 2010-03-18T17:12:49.983

i want to see if this is possible. is it part of the design of the Internet. just a learning exercise. – Rohit Banga – 2010-03-19T06:04:13.773

Do you have access to the NAT devices? Depending on the configuration there may be no possible way you can manipulate the route solely from a device behind the router. – Zoredache – 2010-03-23T04:21:08.130

Answers

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Depends on your hardware. A proper router will allow you to configure which interface, and thus IP address certain traffic should go out own. Again depending on the hardware, this can mean a virtual interface if the IP addresses you're looking to differentiate between are coming in on the same physical connection.

DHayes

Posted 2010-03-12T05:08:53.470

Reputation: 2 103

Asked: 2010-03-12T05:08:53.470

Viewed: 260 times

Active: 2010-03-19T19:24:35.620