mpd, vpn, nat, and pf

[dave]

Hello,
    I've searched the archives, but didn't see any answers for this issue.
I'm trying to get internet pptp clients to connect to a natted pptp server.
The box is protected by a pf firewall running nat as well. I'm getting an
error 619, the specified port is not connected. This is a firewall config
issue, as i set it to pass all and it works fine. I'm wondering if pf can
nat the gre traffic Pf configs available upon request, i'm using a block by
default policy.
Thanks.
Dave.