How do I change the port VPN uses?

[rcolumb]

My company uses a Cisco VPN 3000 and Microsoft Win2K VPN client. When our consultants are in the field they have difficulty connecting to our VPN due to the customer's firewall not allowing the default VPN port through. We would like to change the port used to 80. Is this possible and how do we do it?

[paqiu]

For Microsoft PPT VPN client , we can not do too much. It is using TCP 1723 and protocol GRE. There is no way to change the port. Even you can change TCP port, how about the protocol GRE which is using to pass traffic ?

If you are using Cisco unity VPN client 3.x , you can choose to use "IPSEC over TCP" feature and change the port to 80 or whatever you like.

http://www.cisco.com/warp/customer/471/vpn3k_ipsec_tcp.html

Best Regards,