Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This is my situation: I want to connect to an OpenVPN server from my office (we're using a proxy, only ports 80 and 443 are allowed).

Server IP address is:

My static IP address is:

Is possibile to forward the 843 TCP port to the 443 port using IPFW? (I'm on OSX).

Thanks for the answers.

share|improve this question
if you are behind a proxy, you have to involve the proxy in your project. maybe this way for openvpn: openvpn via proxy – xx4h Feb 14 '13 at 6:49

If the office proxy only allows outgoing connections to ports 80 and 443 and that can't be changed, you need a forwarder in the internet (outside the office intranet, behind its proxy).

Simplest would be to change the server to listen on port 443 instead or on both 843 and 443. The latter could be achieved by adding a port forwarding rule on the server itself.

If you can't change the proxy or the server, a forwarding rule on any internet server you have access to would do the job. That would be no security problem since it just handles encrypted data. The only drawback is traffic on the forwarding server and maybe its limiting bandwidth.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.