see below... -----Original Message----- From: James Cameron [mailto:james.cameron@xxxxxx] Sent: Wednesday, November 26, 2008 04:06 PM To: tony.chamberlain@xxxxxxxxx Cc: 'ppp, Linux' Subject: Re: pptp failure On Wed, Nov 26, 2008 at 01:47:44PM +0000, tony.chamberlain@xxxxxxxxx wrote: > Box B shows this from debug: > sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x354ce8ff> <pcomp> <accomp>] > rcvd [LCP ConfReq id=0x1 <auth chap MS-v2> <mru 1460> <magic 0x99302d60>] > (then some more sent and receiveds) Looks normal. Nothing unusual. I presume Box B is working fine? You didn't explicitly say. > Box A just show repeat: > sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe58c245e> <pcomp> <accomp>] > sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe58c245e> <pcomp> <accomp>] > Script pptp X.X.X.X --nolaunchpppd finished (pid 18300), status = 0x0 > Modem hangup > Connection terminated. > (I Xed out the actual VPN IP address which is the same as Box B). > > So for some reason, Box A is not getting a response back. This shows pppd is not receiving any data from the peer. Without data, pppd will not succeed. Diagnose this further by verifying the arrival of GRE packets, protocol 47, on the network interface that the TCP port 1723 connection should have established on. If no packets arrive, then the problem is outside your host. > I see it is a different magic number. Could that have anything to do > with it? No. The magic numbers are random. > After > a short time it gets a SIGUSR: > pptpconfig: pppd process terminated by signal 16 (failed) > pptpconfig: SIGUSR1 Should not be relevant. pptpconfig is deprecated, and I'm the author. It is a PHP-GTK wrapper around pppd. pptpconfig has several problems that I'm not fixing, but I don't recall if any of them might cause this symptom. I suggest you try to exclude pptpconfig from your test. > Any idea what is happening? I did recently install cisco vpn client > on Box A, but pptp was working after to that. I don't know what the effect of that software is. Suggest you also reveal version of pppd and version of pptp. Reply CC mailing list. -- James Cameron http://quozl.netrek.org/ HP Open Source, Volunteer http://opensource.hp.com/ PPTP Client Project, Release Engineer http://pptpclient.sourceforge.net/ ======================================================================= Sorry for the awkward-lloking cut and paste. Best I could do with wire shark. I captured just the port you mentioned (TCP/UDP 1723). I thought for privacy I should X out the actual VPN IP address so I replaced it (this output only) with WWW.XX.YYY.ZZ. By the way here are the versions of what you asked: pppd version 2.4.3 pptp version 1.7.1 Linux 2.6.9-78.0.5.ELsmp #1 SMP Wed Oct 8 07:12:03 EDT 2008 i686 i686 i386 GNU/Linux ===== Wireshark output === No. Time Source Destination Protocol Info 138 24.241146 192.168.5.191 WWW.XX.YYY.ZZ TCP 34165 > pptp [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=500664196 TSER=0 WS=2 Frame 138 (76 bytes on wire, 76 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 0, Len: 0 No. Time Source Destination Protocol Info 139 24.259152 WWW.XX.YYY.ZZ 192.168.5.191 TCP pptp > 34165 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 MSS=1460 TSV=1680627876 TSER=500664196 WS=5 Frame 139 (76 bytes on wire, 76 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 0, Ack: 1, Len: 0 No. Time Source Destination Protocol Info 140 24.259222 192.168.5.191 WWW.XX.YYY.ZZ TCP 34165 > pptp [ACK] Seq=1 Ack=1 Win=5840 Len=0 TSV=500664214 TSER=1680627876 Frame 140 (68 bytes on wire, 68 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 1, Ack: 1, Len: 0 No. Time Source Destination Protocol Info 141 24.259596 192.168.5.191 WWW.XX.YYY.ZZ PPTP Start-Control-Connection-Request Frame 141 (224 bytes on wire, 224 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 1, Ack: 1, Len: 156 Point-to-Point Tunnelling Protocol No. Time Source Destination Protocol Info 142 24.280101 WWW.XX.YYY.ZZ 192.168.5.191 TCP pptp > 34165 [ACK] Seq=1 Ack=157 Win=6880 Len=0 TSV=1680627878 TSER=500664214 Frame 142 (68 bytes on wire, 68 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 1, Ack: 157, Len: 0 No. Time Source Destination Protocol Info 143 24.280488 WWW.XX.YYY.ZZ 192.168.5.191 PPTP Start-Control-Connection-Reply Frame 143 (224 bytes on wire, 224 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 1, Ack: 157, Len: 156 Point-to-Point Tunnelling Protocol No. Time Source Destination Protocol Info 144 24.280506 192.168.5.191 WWW.XX.YYY.ZZ TCP 34165 > pptp [ACK] Seq=157 Ack=157 Win=5840 Len=0 TSV=500664235 TSER=1680627878 Frame 144 (68 bytes on wire, 68 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 157, Ack: 157, Len: 0 No. Time Source Destination Protocol Info 151 25.261703 192.168.5.191 WWW.XX.YYY.ZZ PPTP Outgoing-Call-Request Frame 151 (236 bytes on wire, 236 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 157, Ack: 157, Len: 168 Point-to-Point Tunnelling Protocol No. Time Source Destination Protocol Info 152 25.285458 WWW.XX.YYY.ZZ 192.168.5.191 PPTP Outgoing-Call-Reply Frame 152 (100 bytes on wire, 100 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 157, Ack: 325, Len: 32 Point-to-Point Tunnelling Protocol No. Time Source Destination Protocol Info 153 25.285503 192.168.5.191 WWW.XX.YYY.ZZ TCP 34165 > pptp [ACK] Seq=325 Ack=189 Win=5840 Len=0 TSV=500665240 TSER=1680627978 Frame 153 (68 bytes on wire, 68 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 325, Ack: 189, Len: 0 No. Time Source Destination Protocol Info 180 30.918488 WWW.XX.YYY.ZZ 192.168.5.191 TCP pptp > 34165 [FIN, ACK] Seq=189 Ack=325 Win=7936 Len=0 TSV=1680628542 TSER=500665240 Frame 180 (68 bytes on wire, 68 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 189, Ack: 325, Len: 0 No. Time Source Destination Protocol Info 181 30.918669 192.168.5.191 WWW.XX.YYY.ZZ PPTP Call-Clear-Request Frame 181 (84 bytes on wire, 84 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 325, Ack: 190, Len: 16 Point-to-Point Tunnelling Protocol No. Time Source Destination Protocol Info 182 30.918827 192.168.5.191 WWW.XX.YYY.ZZ TCP 34165 > pptp [FIN, ACK] Seq=341 Ack=190 Win=5840 Len=0 TSV=500670874 TSER=1680628542 Frame 182 (68 bytes on wire, 68 bytes captured) Linux cooked capture Internet Protocol, Src: 192.168.5.191 (192.168.5.191), Dst: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ) Transmission Control Protocol, Src Port: 34165 (34165), Dst Port: pptp (1723), Seq: 341, Ack: 190, Len: 0 No. Time Source Destination Protocol Info 183 30.939478 WWW.XX.YYY.ZZ 192.168.5.191 TCP pptp > 34165 [RST] Seq=190 Win=0 Len=0 Frame 183 (62 bytes on wire, 62 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 190, Len: 0 No. Time Source Destination Protocol Info 184 30.939693 WWW.XX.YYY.ZZ 192.168.5.191 TCP pptp > 34165 [RST] Seq=190 Win=0 Len=0 Frame 184 (62 bytes on wire, 62 bytes captured) Linux cooked capture Internet Protocol, Src: WWW.XX.YYY.ZZ (WWW.XX.YYY.ZZ), Dst: 192.168.5.191 (192.168.5.191) Transmission Control Protocol, Src Port: pptp (1723), Dst Port: 34165 (34165), Seq: 190, Len: 0 -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
