Firewall-1

Re: [FW-1] VPN client through FW-1 NG AI R55

Subject: Re: [FW-1] VPN client through FW-1 NG AI R55
From: Nicola Nicoletti <nicola.nicoletti AT STARVOX DOT IT>
To: FW-1-MAILINGLIST AT AMADEUS.US.CHECKPOINT DOT COM
Date: Wed, 3 Nov 2004 08:49:47 +0100
Hi
You could use hide nat rules on FW1






             "Steven S."
             <ssurdock@ENGINEE
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             @AMADEUS.US.CHECK         [FW-1] VPN client through FW-1 NG
             POINT.COM>                AI R55


             02/11/2004 22.14


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Greetings,

I'm trying to use an AT&T supplied VPN client through our internal FW to
connect to an AT&T controlled VPN server.  The VPN is established but I
can't fully communicate unless I configure a one-to-one NAT.  The client is
configured to use UDP encapsulation, but it's not used by the client.
During the ISAKMP negotiation I see that FW-1 does not changed the source
port of the negotiations (UDP 500  <--> UDP 500).  I believe this is
confusing the remote VPN server (which I suspect is looking for a NAT-T
type
translation) and it is not requesting UDP encapsulation.

Anyone see this before (I've had no luck in the archives.)

Does anyone know of a way to force FW-1 to perform source port translation
on ISAKMP negotiation?

Thanks,

-Steve S.

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