I've got a weird problem with outbound PPTP connection. We're using an internal range of workstations, NATing through an Astaro 3.2xx firewall to a Windows 2000 VPN server at another site.
If I try to start a PPTP connection from one of the Windows XP workstations on my internal network, it will attempt to connect and eventually fail with a 721 error. On the other hand, if I start a second PPTP connection from a different Windows XP workstation while the first workstation is still trying to connect, the second workstation will succeed in connecting every time.
The fact that the second will connect under weird conditions makes me think it's not a packet filter problem. The weird part is that the packet filter live will show incoming GRE packets being denied when I'm trying to connect just one PC. I've got rules permitting all outbound traffic of all types from the internal network and there are also rules permitting GRE and PPTP from the outside VPN server.
Any ideas?
Grendel...
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