On 02/22/2006 07:48 AM, Yannick Deltroo wrote: > One quick question about the PPTP NAT helper: > Does it support multiple PPTP clients connecting to the same PPTP > server from behind a Netfilter NAT router ? Yes, this is probably the most common use for it. > I guess Call-Id could be used to track multiple calls in the same > control connection. Not supported. Each call must have its own control connection. The TCP source port of the control connection is used to NAT the Call-Id. I'm not aware of any clients that use multiple calls.