[pptp-server] Win2k - pptp encyption problems -- a solution

[Steven Pritchard]

OK, it gets even better...  I decided to test Windows 2000.  With
"mppe-40" commented out, everything works perfectly.  With it
uncommented, the link doesn't work.

Then I noticed something odd...  I started pinging the other side of
the link.  The connection came up, and this log message appeared:

    Apr  9 20:47:27 ra0 pppd[10021]: Script /etc/ppp/ip-up finished (pid 10023), status = 0x0

The other side of the link responded to pings at this point!

Then the following showed up in the logs:

    Apr  9 20:47:30 ra0 pppd[10021]: sent [CCP ConfReq id=0x3 <mppe 1 0 0 40>]
    Apr  9 20:47:33 ra0 pppd[10021]: sent [CCP ConfReq id=0x3 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfAck id=0x3 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: MPPE 128 bit, stateless compression enabled
    Apr  9 20:47:34 ra0 pppd[10021]: stateless MPPE enforced
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfReq id=0x8 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: sent [CCP ConfReq id=0x4 <deflate 15> <deflate(old#) 15> <mppe 1 0 0 60> <bsd v1 15>]
    Apr  9 20:47:34 ra0 pppd[10021]: sent [CCP ConfAck id=0x8 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfAck id=0x3 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfAck id=0x3 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfRej id=0x4 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
    Apr  9 20:47:34 ra0 pppd[10021]: sent [CCP ConfReq id=0x5 <mppe 1 0 0 60>]
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfNak id=0x5 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: sent [CCP ConfReq id=0x6 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: rcvd [CCP ConfAck id=0x6 <mppe 1 0 0 40>]
    Apr  9 20:47:34 ra0 pppd[10021]: MPPE 128 bit, stateless compression enabled
    Apr  9 20:47:34 ra0 pppd[10021]: stateless MPPE enforced

At this point, the other side of the link stopped responding to pings.

Anyone want to take a guess at what is happening?

Steve
-- 
steve at silug.org           | Southern Illinois Linux Users Group
(618)398-7320             | See web site for meeting details.
Steven Pritchard          | http://www.silug.org/