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slow network connection through site-to-site vpn with checkpoint.

hi team.

Recently, We've got concern regarding site-to-site vpn between cisco ios rotuer(2600) and checkpoint firewall vpn.

The main issue is slow network connection through vpn. I don't know why it is too slow.

It is too hard to modify checkpoint firewall. we can modify cisco ios router only.

So, could you give some advice to clear this issue?

We think the main issue is MTU, so, we are going to change mtu size in router interface.

Is it ok if we configure only router not in checkpoint?

and could you give us any idea to kick out this issue? any vpn feature could be ok.

Cisco Employee

Re: slow network connection through site-to-site vpn with checkp

You can lower the MSS size on the IOS router.

On the LAN interface, you can lower it using the following command:

ip tcp adjust-mss 1300

Hope that helps.

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