[pptp-server] Linux PPTP client and WatchGuard FireBox II firewall

[Max Enders]

Greetings,

I've been trying for a few hours now to get the Linux PPTP client to work. 
I'm connecting to a WatchGuard FireBox II...a firewall that has a PPTP 
daemon. It supports MS-CHAPv2, MPPE, and all that other stuff. I get 
connected fine using 1.0.2 of the client and ppp 2.3.8, patched. Below, you 
can see a snippit of my ifconfig, some logs, and my routing table. I'm 
connecting using the following command line:

pptp <ip of server> name <username> remotename watchguard

It gets connected, but I'm not able to ping 192.168.42.70. It gives me some 
errors in the logs about unsupported protocols and I also get a lot of 
discarded GRE warnings from the PPTP client. I'm just connecting to the 
Internet with a 33.6 modem -- it's been working for
everything else. Also, I should mention that the Windows 98 PPTP client 
functions with this same dial-up account to the same firewall. Anyhow, let 
me know if there's anything else you need to know.

Snippit from ifconfig:

ppp1      Link encap:Point-to-Point Protocol
          inet addr:192.168.42.72  P-t-P:192.168.42.70  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:338  Metric:1
          RX packets:312 errors:0 dropped:0 overruns:0 frame:0
          TX packets:313 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10

Snippit from /var/log/messages:

Jul 13 19:31:02 gateway (unknown)[828]: 
log[pptp_dispatch_ctrl_packet:pptp_ctrl.
c:637]: Outgoing call established.
Jul 13 19:31:03 gateway pppd[833]: pppd 2.3.8 started by root, uid 0
Jul 13 19:31:03 gateway pppd[833]: Using interface ppp1
Jul 13 19:31:03 gateway pppd[833]: Connect: ppp1 <--> /dev/ttya0
Jul 13 19:31:07 gateway pppd[833]: Remote message: 
S=8018413c6d2de418f47843c4886
b9d4182a5a1ef
Jul 13 19:31:08 gateway modprobe: can't locate module ppp-compress-18
Jul 13 19:31:09 gateway last message repeated 2 times
Jul 13 19:31:09 gateway pppd[833]: local  IP address 192.168.42.72
Jul 13 19:31:09 gateway pppd[833]: remote IP address 192.168.42.70
Jul 13 19:31:09 gateway modprobe: can't locate module ppp-compress-18
Jul 13 19:31:28 gateway last message repeated 37 times
Jul 13 19:31:28 gateway pppd[833]: Protocol-Reject for unsupported protocol 
0x21
45
Jul 13 19:31:29 gateway modprobe: can't locate module ppp-compress-18

Snippit from route:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
209.162.144.5   *               255.255.255.255 UH    0      0        0 ppp0
192.168.42.70   *               255.255.255.255 UH    0      0        0 ppp1
10.0.0.254      *               255.255.255.255 UH    0      0        0 eth0
10.0.0.0        *               255.255.255.0   U     0      0        0 eth0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         209.162.144.5   0.0.0.0         UG    0      0        0 ppp0

Warnings from the client:

warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order
warn[decaps_gre:pptp_gre.c:239]: discarding out-of-order

Thanks!

Max Enders
menders at hotmail.com


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