02-11-2002 12:46 PM - edited 02-20-2020 09:58 PM
Hi there,
We have been using VPN client 3.1. What is the difference (advantages and disadvantages) between "IPSec over UDP" and "IPSec over TCP"?
Thanks.
05-16-2002 09:41 PM
Depending on where your clients are located, the TCP option is usually simpler and more palatable if your clients are going to be situated behind a firewall. We do this through a number of stateful inspection firewalls with NAT/PAT etc, as well as some proxying firewalls (with a few limitations)
05-17-2002 06:07 AM
I was unable to use Ipsec/UDP or TCP going through a MS Proxy to a VPN3005. I can authenticate the group and user but after that the client hangs on. Could you do that? thanks.
06-25-2002 04:13 AM
You can not do IPSE over UDP or TCP through MS proxy server.
Because MS proxy is not PAT/NAT, it is using application layer proxy service.
When we are doing IPSEC over UDP or TCP, we re-encapsulate the IPSEC packet into a new UDP or TCP packet, using UDP or TCP port 10000 ( can be changed to anything else).
This is reason why IPSEC/UDP or TCP can pass Microsoft internet connection share (ICS) but not proxy service.
Because ICS is PAT but MS proxy is another story.
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