[pptp-server] Martian packets and NetBIOS problems

[Leo Torio]

Matt:

Hi. Thanks for replying.

Here's what I'm using:
Client: Win2K Pro (using default VPN settings)
Server: Red Hat Linx 7.1 (with a stock 2.4.2-2 kernel) running a modified
ppp (ppp-mppe-2.4.0-4 from http://pptpclient.sourceforge.net/) and pptp
1.0.1. All were installed via RPM.

When you ask if I'm patched for 128-bit encryption, you mean the client or
the server? If it's the client, then yes. Win2K is already patched for
128-bit encryption. If you mean the server, I'm guess it is.

About pinging with encryption disabled, do I disable it on the server or the
client. If you mean the client, I can't. Win2K defaults to using the highest
encryption available on the server and there is no option to lower it (maybe
I just can't find it).

Here is the most recent log I've made using suggestions from other users:

Oct 24 09:44:55 neptune ipchains: Flushing all chains: succeeded
Oct 24 09:44:55 neptune ipchains: Removing user defined chains: succeeded
Oct 24 09:44:55 neptune ipchains: Resetting built-in chains to the default
ACCEPT policy succeeded
Oct 24 09:45:20 neptune pptpd[17964]: CTRL: Client 149.99.98.43 control
connection started
Oct 24 09:45:20 neptune pptpd[17964]: CTRL: Starting call (launching pppd,
opening GRE)
Oct 24 09:45:20 neptune pppd[17965]: pppd 2.4.0 started by root, uid 0
Oct 24 09:45:20 neptune pppd[17965]: Using interface ppp1
Oct 24 09:45:20 neptune pppd[17965]: Connect: ppp1 <--> /dev/pts/5
Oct 24 09:45:20 neptune pptpd[17964]: GRE: Bad checksum from pppd.
Oct 24 09:45:20 neptune pptpd[17964]: GRE: Discarding duplicate packet
Oct 24 09:45:23 neptune pptpd[17964]: CTRL: Ignored a SET LINK INFO packet
with real ACCMs!
Oct 24 09:45:23 neptune pppd[17965]: MSCHAP-v2 peer authentication succeeded
for leo
Oct 24 09:45:23 neptune pppd[17965]: found interface eth1 for proxy arp
Oct 24 09:45:23 neptune pppd[17965]: local  IP address 192.168.1.51
Oct 24 09:45:23 neptune pppd[17965]: remote IP address 192.168.1.86
Oct 24 09:45:23 neptune pppd[17965]: MPPE 128 bit, stateless compression
enabled
Oct 24 09:50:43 neptune pppd[17965]: LCP terminated by peer
(^CM--/M-E^@<M-Mt^@^@^@^@)
Oct 24 09:50:43 neptune pppd[17965]: Modem hangup
Oct 24 09:50:43 neptune pppd[17965]: Connection terminated.
Oct 24 09:50:43 neptune pppd[17965]: Connect time 5.4 minutes.
Oct 24 09:50:43 neptune pppd[17965]: Sent 9285 bytes, received 21089 bytes.
Oct 24 09:50:43 neptune pptpd[17964]: CTRL: Error with select(), quitting
Oct 24 09:50:43 neptune pptpd[17964]: CTRL: Client 149.99.98.43 control
connection finished
Oct 24 09:50:43 neptune pppd[17965]: Exit.

I don't get the martian packets anymore (others told me to change the remote
and local IP addresses). I did that before and got the same result. I did it
again and now the packets are gone.

My problem now is that I can't ping anything from the client.

I try to browse the network and I get:

WORKGROUP is not accessible.

The list of servers for this workgroup is not currently available.

Any thoughts? Thanks.

Leo

-----Original Message-----
From: Matt Gavin [mailto:mattgav at tempo.com.au]
Sent: Tuesday, October 23, 2001 5:54 PM
To: Leo Torio
Subject: RE: [pptp-server] Martian packets and NetBIOS problems


What is the client?
What is the servers OS/Kernel/PPPD/PPTPD?
Have you patched for 128-Bit encryption?
Can you ping when Encryption is disabled?

Matt.