Shorewall users - Sep 2002 - Timeout till next possible connect?

Hi,

I use the pptp daemon (poptop) on a debian 3.0 system.
Everything works like a charm but something is a bit
annoying: When I close the vpn connection to my server I
have to wait several minutes before it accepts a new vpn
connection. The log file shows the same starting sequence
but the client never gets authentificated. Is it a problem
of the pptp daemon? Should I post this again to the
poptop mailing list or has anybody had the same problem
and was able to solve it?

Tia,
Ulf