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TOPIC: Checkpoint VPN IP Address Conflict

Checkpoint VPN IP Address Conflict 12 years 4 months ago #3587

  • FreeFall
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We have an office in the Virginia that we're planning to connect via VPN to our office here in Manila. Problem is that our office in Virginia is using 192.168.1.x IP block and one of our other office's in Vietnam which is already connected to use via VPN is already using the same IP block and our Checkpoint firewall is reporting that its seing an IP conflict on our network.

Is there a way to get around this problem?

Thanks in advance for your help.
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Re: Checkpoint VPN IP Address Conflict 12 years 4 months ago #3598

  • tfs
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I'm not sure how you are going to get around the problem.

The VPN tunnel will use both your Private address and your Public address to find out how to address the packets.

The problem is you have something like:

192.168.122.1 via 66.22.15.23 and
192.168.122.1 via 120.5.15.12

But you are asking to connect to 192.168.122.1. The problem is how is the firewall going to know whether you want to go to 66.22.15.23 or 120.5.15.12.

What I would do, since these are private networks, is change one of the LANs (the easiest one) to another subnet. For exampe,using my above subnets, change one of the 192.168.122.x subnets to 192.168.120.x. Unless you have hardcoded something to use the 192.168.122 subnet - it should be pretty clean, especially if you are using DHCP. Then it's a snap.

Hope that helps,
Thanks,

Tom
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Re: Checkpoint VPN IP Address Conflict 12 years 4 months ago #3617

  • FreeFall
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Hi,

Thanks for the reply, and yes your assumption on what I wanted to do is correct. Iwas searching the net for the past two days and stumble on NAT traversal capabilities of Firewalls.

Do you think this would help me solve my problem?


Thanks again in advance
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