pptp gre nat

[Leif Larsson <leif_(_dot_)_larsson_(_at_)_l3system_(_dot_)_se>]

We currently connect to a pptp server in London from behind our 
OBSD 2.7 firewall. Our IP:s are private (192.168.0.0) so we use NAT.

Problem:
It seems impossible to make more than one connection at the time.
(I can see ipnat building connection number two although).

Question:
Is there some limitation in ipnat (or ipf), maybe its not possible 
to NAT more than one connection (gre protocol) to the same server ?

I read somewhere that Linux had that limitation, anyway when we run 
Linux on the firewall it worked OK (at least for 3 simultaneous 
connections)


Thanks

Leif

Question 2, a little OT:
Has anyone managed to get MS-SQL manager working with this config:
SQL-Manager -> PGPNET-client -> OBSD-FW -> Internet -> OBSD-FW2 ->
MSSQL-Server

OBSD-FW2 runnning 2.7 and isakmpd.("ipsec server") 
Everything else runs perfect.