[pptp-server] Connecting NT to Linux Poptop with MSCHAP+MPPE

[Nguyen Thanh Phong]

Hi all,

I want to setup VPN between NT & PoPToP servers running on Linux (RH
6.1) with ms-chap & MPPE.

I downloaded Adi's RPM packages, rebuilt and installed. Everything seems
fine. In my /etc/ppp/options on my linux box, I put  the followings

lock
debug
+chapms
+chapms-v2
+MPPE-40
+MPPE-128
+MPPE-stateless

On Windows NT machine, in Security tab of the dial-up entry, I checked the
box "Accept only Microsoft encrypted authentication", without checking the
two boxes below it.

When I make PPTP connection from NT to my Linux box, I got the NT machine
authenticated and registered (?) to the network. On the linux box, I see the
interface up. However I cannot ping each other (errors are 3 last line).

Could someone provide me with some help?

Many thanks.

Phong.


Aug  9 01:20:08 aurora pptpd[2843]: CTRL (PPPD Launcher): Connection speed =
115200
Aug  9 01:20:09 aurora pptpd[2843]: CTRL (PPPD Launcher): local address =
192.168.2.30
Aug  9 01:20:09 aurora pptpd[2843]: CTRL (PPPD Launcher): remote address =
192.168.2.40
Aug  9 01:20:09 aurora pppd[2843]: pppd 2.3.10 started by root, uid 0
Aug  9 01:20:09 aurora pppd[2843]: Using interface ppp0
Aug  9 01:20:09 aurora pppd[2843]: Connect: ppp0 <--> /dev/pts/1
Aug  9 01:20:09 aurora pptpd[2842]: CTRL: Received PPTP Control Message
(type: 15)
Aug  9 01:20:09 aurora pptpd[2842]: CTRL: Ignored a SET LINK INFO packet
with real ACCMs!
Aug  9 01:20:09 aurora pptpd[2842]: CTRL: Ignored a SET LINK INFO packet
with real ACCMs!
Aug  9 01:20:10 aurora pppd[2843]: MSCHAP peer authentication succeeded for
nhdung
Aug  9 01:20:10 aurora pppd[2843]: local  IP address 192.168.2.30
Aug  9 01:20:10 aurora pppd[2843]: remote IP address 192.168.2.40
Aug  9 01:20:10 aurora pppd[2843]: MPPE 40 bit, stateless compression
enabled
Aug  9 01:20:16 aurora pppd[2843]: Unsupported protocol (0x4d40) received
Aug  9 01:20:17 aurora pppd[2843]: Unsupported protocol (0xb511) received
Aug  9 01:20:18 aurora pppd[2843]: Unsupported protocol (0x7a40) received