IPSec over TCP

[Byron Sonne]

Hey Folks,

Seems that 500/UDP is the main focus for IPSec. However, I need to be 
able to detect IPSec running over TCP, and of all the things I've played 
around with (gear at work running IPSec, swan, isakmpd, etc.) 500/TCP 
never seems to be open.

I don't need to actually have working communications and info exchange 
between entities, etc. I'm not interested in creating a viable network. 
What I do want to get is a server setup that listens on 500/TCP for 
IPSec stuff so I can attempt to tickle responses out of it, and I'm not 
having any luck.

Can anyone give me some pointers? I'd appreciate it! (or a live IP 
listening on 500/TCP that doesn't mind some heavy probing ;)

Regards,
Byron
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