Yes, you'll need to 'upgrade' your FW-1 software to include the 3DES 
algorithm, for that you'll need to install the 'Strong' edition. You can 
install over the top, but you'll need to be careful with build numbers, you 
might need to revert to a previous SP level. You can download from 
Checkpoint's site if you have a suitable login.

At 09:54 14/11/2000 +0000, you wrote:

>Hi,
>
>Any information or advice on the following would be of great help:-
>
>At present, we have a VPN setup bewteen  us and a third party company. Both
>Firewalls are Firewall-1. The difference is, we are Version 4.0 (Build 4031
>VPN + DES) and their's is  Version 4.1 VPN + DES (I'm not too sure what
>build its got.).
>
>What I want to do is change how the ISAKMP/OAKELY Phase one key exchange is
>encrypted, I  want to amend this from DES to 3DES. The data that the rule
>encrypts I don't want to change - this is set to DES at the moment.
>
>I believe for this to happen I will need a License that supports VPNSTRONG
>on both Firewalls. This is what I was told my my Firewall support area.
>
>I'm still not so sure because the version is  VPN +DES only. I was a bit
>concerned that you need to also install 3Des algorithms.
>
>Has anyone performed a simlalar operation.
>
>Thanks.
>
>
>
>
>Nick Mandis
>Security Services
>
>Level O/1, Goodmans Fields, 74 Alie Street, London E1 8HL
>
>Phone: 78003: 3653 (0171 480 3653)
>work email: [EMAIL PROTECTED]:
>
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