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What protocols must router permit for VPN on firewall?

We have a Cisco router connected to the outside interface of a PIX506 firewall running v6. It works fine for SMTP mail and access from inside to Internet, and I now want to set up VPN to it from clients using Cisco VPN Client 3.

The ISP asks what ports and protocols I need opened on the router. I don't know! What ones do I need for clients to run normal Windows operations including a telnet into a UNIX host?

Michael Burnford

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Re: What protocols must router permit for VPN on firewall?

In addition, the Cisco documentation seems to say that the router must support IKE Mode Config, and my ISP says their router (Cisco2500) does not.

Can I still get the VPNClient3 to initiate a connection (presumably using an IP address from the "ip local pool" range)?

If not, how do I do it?

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