PPP authentication error and Getting some garbage from modem

Harini1111 · 11-20-2008, 08:26 PM

Hi,

I try to connect net via USB modem using KPPP, my pppd daemon died unexpectedly. The ppp log says “Failed to authenticate ourselves to peer”. If I try to connect second time I get some garbage strings from modem. There is nothing in the PPP log even I didn’t get above failed to authentication message.

My modem is not activated by Internet provider. So I expected that Authentication error but why I am getting some garbage(I don’t know some strings) value from the modem in second and thrid times. If I reset my modem manually then I get that authentication error.

Is this garbage vaule is acceptable from modem after I getting the authentication error?

I am using Ubuntu Linux and kernel version is 2.6.24-19.

Thanks,
harini.

PPP log.
Nov 20 17:51:00 hp-umpc pppd[6885]: The remote system is required to authenticate itself
Nov 20 17:51:00 hp-umpc pppd[6885]: but I couldn't find any suitable secret (password) for it to use to do so.
Nov 20 17:51:00 hp-umpc pppd[6885]: (None of the available passwords would let it use an IP address.)
Nov 20 17:51:19 hp-umpc pppd[6903]: pppd 2.4.4 started by root, uid 0
Nov 20 17:51:19 hp-umpc pppd[6903]: using channel 3
Nov 20 17:51:19 hp-umpc pppd[6903]: Using interface ppp0
Nov 20 17:51:19 hp-umpc pppd[6903]: Connect: ppp0 <--> /dev/ttyUSB0
Nov 20 17:51:19 hp-umpc pppd[6903]: sent [LCP ConfReq id=0x1 <asyncmap 0xa0000> <magic 0x20292134> <pcomp> <accomp>]
Nov 20 17:51:22 hp-umpc pppd[6903]: sent [LCP ConfReq id=0x1 <asyncmap 0xa0000> <magic 0x20292134> <pcomp> <accomp>]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [LCP ConfReq id=0x1 <mru 1500> <asyncmap 0x0> <auth chap MD5> <magic 0xcdbf1786> <pcomp> <accomp>]
Nov 20 17:51:23 hp-umpc pppd[6903]: sent [LCP ConfAck id=0x1 <mru 1500> <asyncmap 0x0> <auth chap MD5> <magic 0xcdbf1786> <pcomp> <accomp>]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [LCP ConfAck id=0x1 <asyncmap 0xa0000> <magic 0x20292134> <pcomp> <accomp>]
Nov 20 17:51:23 hp-umpc pppd[6903]: sent [LCP EchoReq id=0x0 magic=0x20292134]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [CHAP Challenge id=0x1 <b4ff61760476b99a563d7a88264c8636>, name = ""]
Nov 20 17:51:23 hp-umpc pppd[6903]: sent [CHAP Response id=0x1 <e4cdd1e957980556378eaae33cde30c0>, name = " test"]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [LCP EchoRep id=0x0 magic=0xcdbf1786]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [CHAP Failure id=0x1 ""]
Nov 20 17:51:23 hp-umpc pppd[6903]: CHAP authentication failed
Nov 20 17:51:23 hp-umpc pppd[6903]: CHAP authentication failed
Nov 20 17:51:23 hp-umpc pppd[6903]: sent [LCP TermReq id=0x2 "Failed to authenticate ourselves to peer"]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [LCP TermReq id=0x2]
Nov 20 17:51:23 hp-umpc pppd[6903]: sent [LCP TermAck id=0x2]
Nov 20 17:51:23 hp-umpc pppd[6903]: rcvd [LCP TermAck id=0x2]
Nov 20 17:51:23 hp-umpc pppd[6903]: Connection terminated.
Nov 20 17:51:23 hp-umpc pppd[6903]: Exit.

pinniped · 11-22-2008, 06:51 AM

I can't tell what's happening from the information you posted. Your log file says "connection terminated" so presumably the modem should have been put into its waiting state. I can't see from this information why the modem would give you garbage.

Try checking your modem initialization strings. Also, see if any modem control strings are sent after a disconnect (usually not required unless the modem is buggy).