[pptp-server] ppp_mppe seems to die

[Harald Scharf]

Hello to all,
i have a problem, when i connect to pptpd with
Micro$oft encryption enabled.
The connection is up for several seconds, or minutes, and then
it breaks without any error message.
I tried to locate the error with comparing the Routing Tables on Client
and Server, but they seem to be ok.
This is the Output from the Syslog :

Dec 15 12:13:48 fwneu pptpd[31081]: CTRL: Starting call (launching pppd, opening GRE)
Dec 15 12:13:48 fwneu pppd[31082]: pppd 2.3.8 started by root, uid 0
Dec 15 12:13:48 fwneu pppd[31082]: Using interface ppp1
Dec 15 12:13:48 fwneu pppd[31082]: Connect: ppp1 <--> /dev/pts/2
Dec 15 12:13:48 fwneu pptpd[31081]: GRE: Discarding duplicate packet
Dec 15 12:13:50 fwneu pptpd[31081]: CTRL: Ignored a SET LINK INFO packet with real ACCMs!
Dec 15 12:13:50 fwneu pppd[31082]: MSCHAP-v2 peer authentication succeeded for hs
Dec 15 12:13:50 fwneu pppd[31082]: Cannot determine ethernet address for proxy ARP
Dec 15 12:13:50 fwneu pppd[31082]: local  IP address 192.168.3.1
Dec 15 12:13:50 fwneu pppd[31082]: remote IP address 192.168.2.236
Dec 15 12:13:50 fwneu pppd[31082]: MPPE 40 bit, stateless compression enabled

I tried the Setup on two different Linux Systems.
SuSE Linux 6.3 and RedHat Linux 6.1, both with
Kernel Release 2.2.15.
pptpd Version : 0.9.17
pppd Version 2.3.8 with mppe Patches.
Clients : Windows 2000, Windows 98 or Windows NT

My pptpd.conf :

debug
speed 115200
localip 192.168.3.1
remoteip 192.168.2.234-238
name fwneu


My ppp options File :

require-chap
+chap
+chapms
+chapms-v2
auth
mppe-40
mppe-128
mppe-stateless
proxyarp
debug

If MPPE is disabled, the connection is stable.
Any idea ?

Harald
Enns, Austria


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