PPTP to a PIX

I've read of a few PPTP problems in the group but none that quite shed
any light for me. Hopefully someone can point me in the right
direction, or at least clear things up a bit.

I'm ultimately trying to NAT from my internal lan through the linux
server to a remote network via PPTP. The PPTP service works to several
XP machines but consistently fails on my rh9 machines. It is currently
running 2.4.20-8, so please let me know if there is a known ppp or
mppe error there.

Using pptp-php-gtk-setup, I've created a tunnel as Client to LAN and
added a route to the remote network I ultimately wish to access. It
seems to auth correctly and I get the remote IP after adding
noipdefault, ipcp-accept-local, and ipcp-accept-remote to the profile.
(ppp session output is below) After connecting the outbound counters
crank up really fast and ultimately pppd exits and dies. In the
meantime, if I try to ping the remote network I never see a packet get
dropped into the tunnel on the local side. tcpdump shows no GRE
packets leaving my local machine, so I'm not sure if it just doesn't
get processed by tcpdump, or if the packet just never gets sent on its
way.

Thanks. Any insight is appreciated.





using channel 10
Using interface ppp0
pptp-php-gtk: monitoring interface ppp0
Connect: ppp0 <--> /dev/pts/4
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x11f61bd3> <pcomp>
<accomp>]
rcvd [LCP ConfReq id=0x0 <auth chap MS>]
sent [LCP ConfAck id=0x0 <auth chap MS>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x11f61bd3> <pcomp>
<accomp>]
rcvd [CHAP Challenge id=0x1 <92e0ba503feaa141>, name = ""]
sent [CHAP Response id=0x1
<0000000000000000000000000000000000000000000000004 42c1fd2bff8c168cc4f4094938b6b0022e97b2c56a5997a01> ,
name = "someuser"]
rcvd [CHAP Challenge id=0x2 <726085413bfca42c>, name = ""]
sent [CHAP Response id=0x2
<000000000000000000000000000000000000000000000000f cff40454a2973d32db3e78c251271bc7d2c6e56d4b8d50301> ,
name = "someuser"]
rcvd [CHAP Success id=0x2 ""]
CHAP authentication succeeded
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]
rcvd [IPCP ConfReq id=0x0 <addr PPTP-SERVER-ADDRESS>]
sent [IPCP ConfAck id=0x0 <addr PPTP-SERVER-ADDRESS>]
rcvd [CCP ConfReq id=0x0 <mppe +H -M +S +L -D -C>]
sent [CCP ConfReq id=0x1]
sent [CCP ConfRej id=0x0 <mppe +H -M +S +L -D -C>]
rcvd [CCP ConfAck id=0x1]
rcvd [CCP ConfReq id=0x1]
sent [CCP ConfAck id=0x1]
rcvd [CCP TermReq id=0x2]
CCP terminated by peer
sent [CCP TermAck id=0x2]
Compression disabled by peer.
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]
rcvd [IPCP ConfReq id=0x1 <addr PPTP-SERVER-ADDRESS>]
sent [IPCP ConfAck id=0x1 <addr PPTP-SERVER-ADDRESS>]
rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01>]
sent [IPCP ConfReq id=0x2 <addr 0.0.0.0>]
rcvd [IPCP ConfNak id=0x2 <addr 172.16.51.1>]
sent [IPCP ConfReq id=0x3 <addr 172.16.51.1>]
rcvd [IPCP ConfAck id=0x3 <addr 172.16.51.1>]
local IP address 172.16.51.1
remote IP address PPTP-SERVER-ADDRESS
pptp-php-gtk: pppd process exit status 0
route add -net '172.16.0.0/16' dev 'ppp0'
pptp-php-gtk: routes added to remote networks
pptp-php-gtk: connected
pptp-php-gtk: restoring routing and DNS configuration
route del -net '172.16.0.0/16' dev 'ppp0'
pptp-php-gtk: routing and DNS configuration restored