Server Fault is a question and answer site for system and network administrators. 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

I have a linux openvpn router and a home dsl modem. The dsl modem has port 1234 open and forwards it onto eth0 on the linux router.

I can connect to the router from a remote location no problem. All the traffic is coming through, I can surf the net from the vpn client etc. As a check I opened up wireshark on the client.

If I look at the protocol I can see a lot of UDP traffic, not much else... but I'm not seeing anything (as far as I understand) indicating that the data is being encrypted? Does that sound right or should I be looking at another interface? How is it best to test that the data is being encrypted? Thanks,

share|improve this question
up vote 1 down vote accepted

Well, look at the data? You have wireshark, if you browse to and don't see a DNS request and a HTTP stream opening, and you still see the page being rendered, then it's a pretty big clue. Considering OpenVPN runs on UDP, it makes sense for you to see a ton of UDP traffic instead.

share|improve this answer
Thanks for the reply. The UDP stuff made sense and the lack of DNS did too but I wanted to make sure. Sounds like I'm good. Thanks – Andrew Apr 11 '12 at 17:50
If you're good please mark the answer as the accepted one :) Thanks! – gparent Apr 11 '12 at 19:19

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.