[pptp-server] linux client encryption

[F. CELSE]

Hi,

we are using the linux pptp server 1.0.0 on a red-Hat 6.1 linux box with both NT and
linux clients. Everythings seems working well but the encryption with the linux
clients.

With an NT client, we have in the server logs :

Jun 18 16:01:21 hades pptpd[2634]: CTRL: Client 213.36.36.105 control connection started
Jun 18 16:01:22 hades pptpd[2634]: CTRL: Starting call (launching pppd, opening GRE)
Jun 18 16:01:22 hades modprobe: can't locate module char-major-108
Jun 18 16:01:22 hades kernel: CSLIP: code copyright 1989 Regents of the University of California
Jun 18 16:01:22 hades kernel: PPP: version 2.3.10 (demand dialling)
Jun 18 16:01:22 hades kernel: PPP line discipline registered.
Jun 18 16:01:22 hades kernel: registered device ppp0
Jun 18 16:01:22 hades pppd[2635]: pppd 2.3.10 started by root, uid 0
Jun 18 16:01:22 hades pppd[2635]: Using interface ppp0
Jun 18 16:01:22 hades pppd[2635]: Connect: ppp0 <--> /dev/pts/1
Jun 18 16:01:23 hades kernel: PPP BSD Compression module registered
Jun 18 16:01:23 hades kernel: PPP MPPE compression module registered
Jun 18 16:01:23 hades kernel: PPP Deflate Compression module registered
Jun 18 16:01:23 hades pppd[2635]: MSCHAP peer authentication succeeded for xxxx
Jun 18 16:01:23 hades pppd[2635]: found interface eth0 for proxy arp
Jun 18 16:01:23 hades pppd[2635]: local  IP address x.x.x.x
Jun 18 16:01:23 hades pppd[2635]: remote IP address x.x.x.2x
Jun 18 16:01:23 hades pppd[2635]: MPPE 40 bit, stateless compression enabled
...

With the linux clients we have :

Jun 18 16:08:44 hades pptpd[2688]: CTRL: Client 213.36.36.125 control connection started
Jun 18 16:08:45 hades pptpd[2688]: CTRL: Starting call (launching pppd, opening GRE)
Jun 18 16:08:45 hades modprobe: can't locate module char-major-108
Jun 18 16:08:45 hades pppd[2689]: pppd 2.3.10 started by root, uid 0
Jun 18 16:08:45 hades pppd[2689]: Using interface ppp0
Jun 18 16:08:45 hades pppd[2689]: Connect: ppp0 <--> /dev/pts/1
Jun 18 16:08:47 hades pptpd[2688]: GRE: Discarding duplicate packet
Jun 18 16:08:48 hades pppd[2689]: MSCHAP-v2 peer authentication succeeded for xxx
Jun 18 16:08:49 hades pppd[2689]: found interface eth0 for proxy arp
Jun 18 16:08:49 hades pppd[2689]: local  IP address x.x.x.x
Jun 18 16:08:49 hades pppd[2689]: remote IP address x.x.x.x
Jun 18 16:08:49 hades pppd[2689]: Deflate (15) compression enabled
Jun 18 16:09:11 hades sshd[2720]: log: Connection from 1.6.101.233 port 1023 Regards.

the encryption seems to be disabled.

The linux client (version 1.0.2) is started with both :

pptp <remote-pptpd-host> debug name <username>
pptp <remote-pptpd-host> debug name <username> mppe-40 (or mppe-128)

and it doesn't change anything.

any idea ?

Regards.

--
Frederic CELSE                              Tel    : (+33) 4 76 41 67 34
Sema Group                                  Fax    : (+33) 4 76 41 47 47
Centre de Grenoble                          mailto:frederic.celse at sema.fr
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