Hi all
I am trying to connect my pptp client Linux (ubuntu) to a pptp server using modem but no success.

Observing the following log I found it’s may be due to MPPE Support configuration mismatch in pppd, pppd (linux client) is refusing to accept MPPE encryption.

Can anyone tell me to have that support what to do? I can only tweak ppp linux side.

pppd[24545]: pppd 2.4.5 started by root, uid 0
chat[24547]: abort on (NO CARRIER)
chat[24547]: abort on (NO DIALTONE)
chat[24547]: abort on (ERROR)
chat[24547]: abort on (NO ANSWER)
chat[24547]: abort on (BUSY)
chat[24547]: send (+++++++++++++++++++++++++++++++++++++++++++++++++ +++^M)
chat[24547]: send (+++++++++++++++++++++++++++++++++++++++++++++++++ +++^M)
chat[24547]: send (+++AT^M)
chat[24547]: send (ATHn^M)
chat[24547]: expect (OK)
chat[24547]: ^M^MAT^M^M
chat[24547]: OK
chat[24547]: -- got it
chat[24547]: send (AT&D2^M)
chat[24547]: expect (OK)
chat[24547]: ^M
chat[24547]: ATHn^M^M
chat[24547]: OK
chat[24547]: -- got it
chat[24547]: send (AT&K3^M)
chat[24547]: expect (OK)
chat[24547]: ^M
chat[24547]: AT&D2^M^M
chat[24547]: OK
chat[24547]: -- got it
chat[24547]: send (AT+CBST=71,0,1^M)
chat[24547]: send (AT+CLCC?^M)
chat[24547]: expect (+CLCC:006)
chat[24547]: ^M
chat[24547]: AT&K3^M^M
chat[24547]: OK^M
chat[24547]: AT+CBST=71,0,1^M^M
chat[24547]: OK^M
chat[24547]: AT+CLCC?^M^M
chat[24547]: +CLCC:006
chat[24547]: -- got it
chat[24547]: send (^M)
chat[24547]: timeout set to 100 seconds
chat[24547]: expect (OK)
chat[24547]: ^M
chat[24547]: ^M
chat[24547]: 000^M
chat[24547]: ^M
chat[24547]: OK
chat[24547]: -- got it
chat[24547]: send (ATDT XXXXXXXXXXXX^M)
chat[24547]: expect (CONNECT 19200)
chat[24547]: ^M
chat[24547]: ^MATDT 008816000025^M^M
chat[24547]: CONNECT 19200
chat[24547]: -- got it
chat[24547]: send ()
pppd[24545]: Script /usr/sbin/chat -v -f /etc/ppp/chat-modem1 finished (pid 24546), status = 0x0
pppd[24545]: Serial connection established.
pppd[24545]: using channel 19
pppd[24545]: Using interface ppp0
pppd[24545]: Connect: ppp0 <--> /dev/ttyS0
pppd[24545]: Warning - secret file /etc/ppp/pap-secrets has world and/or group access
pppd[24545]: sent [LCP ConfReq id=0x1 <asyncmap 0xa0000> <magic 0xd953febc> <pcomp> <accomp>]
pppd[24545]: rcvd [LCP ConfReq id=0x92 <asyncmap 0xa0000> <auth chap MD5> <magic 0x1e724e3e> <pcomp> <accomp>]
pppd[24545]: sent [LCP ConfNak id=0x92 <auth pap>]
pppd[24545]: rcvd [LCP ConfAck id=0x1 <asyncmap 0xa0000> <magic 0xd953febc> <pcomp> <accomp>]
pppd[24545]: rcvd [LCP ConfReq id=0x93 <asyncmap 0xa0000> <auth pap> <magic 0x1e724e3e> <pcomp> <accomp>]
pppd[24545]: sent [LCP ConfAck id=0x93 <asyncmap 0xa0000> <auth pap> <magic 0x1e724e3e> <pcomp> <accomp>]
pppd[24545]: Warning - secret file /etc/ppp/pap-secrets has world and/or group access
pppd[24545]: sent [PAP AuthReq id=0x1 user="abcd" password=<hidden>]
pppd[24545]: rcvd [PAP AuthAck id=0x1 ""]
pppd[24545]: PAP authentication succeeded
pppd[24545]: sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
pppd[24545]: sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]
pppd[24545]: rcvd [IPCP ConfReq id=0x1 <addr 192.168.13.254>]
pppd[24545]: sent [IPCP ConfAck id=0x1 <addr 192.168.13.254>]
pppd[24545]: rcvd [CCP ConfReq id=0x1 <mppe -H -M -S -L -D +C>]pppd[24545]: sent [CCP ConfRej id=0x1 <mppe -H -M -S -L -D +C>]
pppd[24545]: rcvd [CCP ConfRej id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]

pppd[24545]: sent [CCP ConfReq id=0x2]
pppd[24545]: rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01>]
pppd[24545]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0>]
pppd[24545]: rcvd [CCP ConfReq id=0x2 < 17 06 00 01 02 00>]
pppd[24545]: sent [CCP ConfRej id=0x2 < 17 06 00 01 02 00>]
pppd[24545]: rcvd [CCP ConfAck id=0x2]
pppd[24545]: rcvd [IPCP ConfReq id=0x2 <addr 192.168.13.254>]
pppd[24545]: sent [IPCP ConfAck id=0x2 <addr 192.168.13.254>]
pppd[24545]: rcvd [IPCP ConfNak id=0x2 <addr 192.168.13.54>]
pppd[24545]: sent [IPCP ConfReq id=0x3 <addr 192.168.13.54>]
pppd[24545]: rcvd [CCP ConfReq id=0x3 < 11 05 00 01 01>]
pppd[24545]: sent [CCP ConfRej id=0x3 < 11 05 00 01 01>]
pppd[24545]: rcvd [IPCP ConfAck id=0x3 <addr 192.168.13.54>]
pppd[24545]: not replacing existing default route via 166.130.109.1
pppd[24545]: local IP address 192.168.13.54
pppd[24545]: remote IP address 192.168.13.254
pppd[24545]: Can't execute /etc/ppp/ip-up: Invalid argument
pppd[24545]: rcvd [CCP ConfReq id=0x4 < 11 05 00 01 03>]
pppd[24545]: sent [CCP ConfRej id=0x4 < 11 05 00 01 03>]
pppd[24545]: sent [CCP ConfReq id=0x2]
pppd[24545]: rcvd [CCP ConfReq id=0x5 <predictor 1>]
pppd[24545]: sent [CCP ConfRej id=0x5 <predictor 1>]
pppd[24545]: rcvd [CCP ConfAck id=0x2]
pppd[24545]: rcvd [CCP TermReq id=0x6]
pppd[24545]: sent [CCP TermAck id=0x6]
pppd[24545]: sent [CCP ConfReq id=0x2]
pppd[24545]: rcvd [CCP TermReq id=0x7]
pppd[24545]: sent [CCP TermAck id=0x7]
pppd[24545]: sent [CCP ConfReq id=0x2]
pppd[24545]: last message repeated 8 times
pppd[24545]: CCP: timeout sending Config-Requests

Any Help will be appricieated

Thanks

Murad.