pppd Hangs on "No response to PAP authenticate-requests"

[Goh Choon Lye]

Hi,

I'm connecting embedded board to GPRS network through GPRS modem
in OpenBSD machine. I have application that sends AT commands to
GPRS modem and wait for result. After that, it will execl the pppd
to negotiate PPP link. Discover that sometimes, pppd will hangs in
"No response to PAP authenticate-requests". If I mannually terminate
pppd and let the application to repeat sending AT commands and execl
pppd again, it can get the IP address.
Does anyone know how to let pppd terminates automatically if
it reaches "No response to PAP authenticate-requests" stage?
My pppd version is 2.3 patch level 5.

My /etc/ppp/options file is
lock
crtscts
nobsdcomp
deflate 0,0
noipdefault
defaultroute
novj
debug
name syslink
asyncmap 0xa0000
pap-max-authreq 3
pap-timeout 5

The pppd debug messages are the following
Mar 25 11:48:04 tiger portsvr: sent [AT+CSQ\r]
Mar 25 11:48:05 tiger portsvr: rcvd [AT+CSQ +CSQ: 14,0 OK ]
Mar 25 11:48:05 tiger portsvr: sent [AT+CGDCONT=1,"IP","shhdb"\r]
Mar 25 11:48:06 tiger portsvr: rcvd [AT+CGDCONT=1,"IP","shhdb" OK ]
Mar 25 11:48:06 tiger portsvr: sent [AT+CGATT=1\r]
Mar 25 11:48:07 tiger portsvr: rcvd [AT+CGATT=1 OK ]
Mar 25 11:48:07 tiger portsvr: sent [ATDT*99***1#\r]
Mar 25 11:48:08 tiger portsvr: rcvd [ATDT*99***1# CONNECT 38400
~^?}#@!}!}!} }6}!}$}%\}"}&} } } } }'}"}(}"}#}$@#&4~]
Mar 25 11:48:09 tiger pppd[24158]: pppd 2.3.5 started by root, uid 0
Mar 25 11:48:09 tiger pppd[24158]: Using interface ppp0
Mar 25 11:48:09 tiger pppd[24158]: Connect: ppp0 <--> /dev/tty03
Mar 25 11:48:09 tiger pppd[24158]: sent [LCP ConfReq id=0x1 <asyncmap
0xa0000> <magic 0x632dfcc5> <pcomp> <accomp>]
Mar 25 11:48:09 tiger pppd[24158]: rcvd [LCP ConfRej id=0x1 <magic
0x632dfcc5>]
Mar 25 11:48:09 tiger pppd[24158]: sent [LCP ConfReq id=0x2 <asyncmap
0xa0000> <pcomp> <accomp>]
Mar 25 11:48:09 tiger pppd[24158]: rcvd [LCP ConfAck id=0x2 <asyncmap
0xa0000> <pcomp> <accomp>]
Mar 25 11:48:11 tiger pppd[24158]: rcvd [LCP ConfReq id=0x1 <mru 1500>
<asyncmap 0x0> <pcomp> <accomp> <auth pap>]
Mar 25 11:48:11 tiger pppd[24158]: sent [LCP ConfAck id=0x1 <mru 1500>
<asyncmap 0x0> <pcomp> <accomp> <auth pap>]
Mar 25 11:48:11 tiger pppd[24158]: sent [PAP AuthReq id=0x1
user="syslink" password="*"]
Mar 25 11:48:14 tiger pppd[24158]: sent [PAP AuthReq id=0x2
user="syslink" password="*"]
Mar 25 11:48:17 tiger pppd[24158]: sent [PAP AuthReq id=0x3
user="syslink" password="*"]
Mar 25 11:48:20 tiger pppd[24158]: No response to PAP
authenticate-requests

Thank you for the advice.

Goh Choon Lye

[joao coelho]

Have you tried adding "updetach" to your options ?
cl...@willowglen.com.sg (Goh Choon Lye) wrote in message news:<21ad597e.0404...@posting.google.com>...