[pptp-server] DTE problems with PoPToP ?

[Paulo Pinto]

Hi there.

I'm having some real *weird* problems with PoPToP.
The setup is a Win95 machine with MSDun1.3 and a RedHat 6.0 Linux box (ppp
2.3.8, plain vannilla pptp.conf and /etc/ppp/options - i.e., like in the
howto examples except for the IP's of course.)
Using ethernet (100Mb) I am able to connect to the Linux box using PPTP.
Disconnecting the Win95 machine from the ethernet and using a Internet
connection, the PPTP seems to get stuck ... a sample from the log :

Jul 19 18:38:29 mts01lin02 pptpd[5339]: CTRL: Client 195.22.18.131 control
connection started
Jul 19 18:38:30 mts01lin02 pptpd[5339]: CTRL: Starting call (launching
pppd, opening GRE)
Jul 19 18:38:30 mts01lin02 pppd[5340]: pppd 2.3.8 started by root, uid 0
Jul 19 18:38:30 mts01lin02 pppd[5340]: Using interface ppp0
Jul 19 18:38:30 mts01lin02 pppd[5340]: Connect: ppp0 <--> /dev/pts/4
Jul 19 18:38:30 mts01lin02 pppd[5340]: sent [LCP ConfReq id=0x1 <asyncmap
0x0> <auth chap MD5> <magic 0xaf6e1e3c> <pcomp> <accomp>]
Jul 19 18:38:36 mts01lin02 last message repeated 2 times
Jul 19 18:38:39 mts01lin02 pptpd[5339]: CTRL: Error with select(), quitting
Jul 19 18:38:39 mts01lin02 pptpd[5339]: CTRL: Client 195.22.18.131 control
connection finished
Jul 19 18:38:39 mts01lin02 pppd[5340]: Modem hangup
Jul 19 18:38:39 mts01lin02 pppd[5340]: Connection terminated.
Jul 19 18:38:39 mts01lin02 pppd[5340]: Exit.

Sometimes (this is the *funny* part), changing the DTE speed on the modem
from, for example, 115200 to 57600 or to 19200 I am able to log in ... but
only sometimes.
I can't seem to find a pattern here... any clues ?

BTW.. is the line 'CTRL: Error with select(), quitting' something of
concern ? or is it just an effect of this error ?

P.S. the boss mumbled something about 'the alternative is goin' to
N(o)T(rust)' ... help PLEASE  ;)

Paulo Pinto
SRD - Sonae Redes de Dados
pspinto at srd.pt