* Re: pptp failure
2008-11-26 13:47 pptp failure tony.chamberlain
2008-11-26 22:06 ` James Cameron
@ 2008-12-02 14:22 ` tony.chamberlain
2008-12-02 22:56 ` James Cameron
2 siblings, 0 replies; 4+ messages in thread
From: tony.chamberlain @ 2008-12-02 14:22 UTC (permalink / raw)
To: linux-ppp
see below...
-----Original Message-----
From: James Cameron [mailto:james.cameron@hp.com]
Sent: Wednesday, November 26, 2008 04:06 PM
To: tony.chamberlain@lemko.com
Cc: 'ppp, Linux'
Subject: Re: pptp failure
On Wed, Nov 26, 2008 at 01:47:44PM +0000, tony.chamberlain@lemko.com 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 WinX40 Len=0 MSS\x1460 TSVP0664196 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 WinW92 Len=0 MSS\x1460 TSV\x1680627876 TSERP0664196 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 WinX40 Len=0 TSVP0664214 TSER\x1680627876
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\x157 Winh80 Len=0 TSV\x1680627878 TSERP0664214
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\x157 Ack\x157 WinX40 Len=0 TSVP0664235 TSER\x1680627878
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] Seq25 Ack\x189 WinX40 Len=0 TSVP0665240 TSER\x1680627978
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\x189 Ack25 Winy36 Len=0 TSV\x1680628542 TSERP0665240
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] Seq41 Ack\x190 WinX40 Len=0 TSVP0670874 TSER\x1680628542
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\x190 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\x190 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
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