[pptp-server] Further news re: PopTop behind NAT

[Christopher Kalos]

	This is the syslog dump (edited slightly to protect hostnames) that I got
as of last night when I tried to connect remotely.  This is what I got when
trying to connect from a Win2000 machine to the VPN server.

pppd 2.3.11 started by root, uid 0
pppd[1493]: Using interface ppp0
pppd[1493]: Connect: ppp0 <--> /dev/pts/0
pppd[1493]: MSCHAP-v2 peer authentication succeeded for gothamftp
pppd[1493]: found interface eth0 for proxy arp
pppd[1493]: local  IP address 192.168.200.240
pppd[1493]: remote IP address 192.168.200.251
pppd[1493]: MPPE 128 bit, stateless compression enabled
pppd[1493]: MPPE 128 bit, stateless compression enabled
pppd[1493]: LCP terminated by peer (gM-^AZg^@<M-Mt^@^@^@^@)
pppd[1493]: Modem hangup
pppd[1493]: Connection terminated.
pppd[1493]: Connect time 0.4 minutes.
pppd[1493]: Sent 1558 bytes, received 4073 bytes.
pppd[1493]: Exit.

Other times, I'll just get this:
pppd[1771]: pppd 2.3.11 started by root, uid 0
pppd[1771]: Using interface ppp0
pppd[1771]: Connect: ppp0 <--> /dev/pts/0
pppd[1771]: LCP: timeout sending Config-Requests
pppd[1771]: Connection terminated.
pppd[1771]: Exit.

	The configuration goes through a FreeBSD 4.3 firewall, over natd, to get to
the VPN server.  These are the current flags to natd:

redirect_proto gre 192.168.200.65
redirect_port tcp 192.168.200.65:pptp pptp

	I may need more than this, but I know that 3.4 didn't need anything beyond
a port redirect and a pptpalias flag.  pptpalias, however, is no longer an
option for the FreeBSD natd implementation.

	Any help or pointers would be appreciated.

Thank you,
Christopher Kalos
Systems Administrator
Gotham Broadband
212.206.9620 x340