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List:       openbsd-misc
Subject:    Re: Change ISAKMP udp port?
From:       Joachim Schipper <j.schipper () math ! uu ! nl>
Date:       2006-09-29 9:01:12
Message-ID: 20060929090109.GA5273 () melpomene ! jschipper ! dynalias ! net
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On Thu, Sep 28, 2006 at 02:28:54PM -0700, Joe wrote:
> Joe wrote:
> >Is it possible to configure ISAKMP (500/udp) to listen on another port, 
> >such as 53/udp?
> >
> >I want to do this because some wireless networks permit outbound port 
> >53/udp and nothing else...
>
> Nevermind. I just realized this won't work. I'll have to take a look at 
> OpenVPN which allows you to run on any UDP port, such as 53.

There also are some IP-over-DNS hacks available; take a look at them, if
you want even more stealth.

Also, IPsec might slip by some misconfigured firewalls.

		Joachim

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