Re: [Users] vpn && firewalls

From: Andreas Steffen (andreas.steffen_at_strongsec.net)
Date: Wed Oct 16 2002 - 13:20:49 CEST


You must open the UDP port 500 in order to let through
the IKE (Internet Key Exchange) negotiation protocol plus
IP protocol number 50 for the encrypted ESP (Encapsulating
Security Payload) packets.

Regards

Andreas

coUnt3r_at_gmx.net wrote:
> hi all,
>
> my little question:
>
> which ports on a firewall must be open for vpn with x.509?
>
> my szenario:
>
>
>
>
> roadwariors(dyn.ip e.g. from a hotel)==>
> ==>personal_firewall on the laptop==>
>
> ==>internet==>
>
> ==>corporate firwewall (static ip)==>
> ==>vpn gateway(static ip)==>
>
> ==>LAN(private ip)
>
>
>
> and the same way back to the roadwarrior...
>
> That's quite enough open the few ports (which ports are that?),
> or we must make another necessary adjustments?
>
>
> TIA
> Toby
>
>
>
>
>
>
>
>

-- 
======================================================================
Andreas Steffen                 e-mail: andreas.steffen_at_strongsec.com
strongSec GmbH                  phone:  +41 76 340 25 56
Alter Zürichweg 20              home:   http://www.strongsec.com
CH-8952 Schlieren (Switzerland)
==========================================[strong internet security]==
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