We currently have a sonicwall firewall on our network which is forwarding PPTP (port 1723) requests to a local Windows 2000 Remote Access server. This is allowing clients to create a VPN connection through the firewall to the server. This appears to be the only rule on the firewall relating to VPN's.
We are trying to swap this firewall with an Avaya SG 203 firewall - I have replaced the sonicwall and set the 203 up in exactly the same way (same ip addresses, port forwarding rules etc). However when I try to connect a VPN client, it gets as far as verifying username and password and then fails with error 628 (the client is windows 98).
Any idea what I'm doing wrong?
Thanks in advance,