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Date:      Thu, 15 Dec 2005 16:57:13 -0300
From:      "Mario Lobo" <mario.lobo@ipad.com.br>
To:        freebsd-hackers@freebsd.org
Subject:   [OFF TOPIC] Please, see attached TXT file
Message-ID:  <43A1A069.12349.2A94B474@localhost>
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[-- Attachment #1 --]
Please, forgive me for posting this here but I am trying to shoot on every direction to see if
someone can give me any clues or directions on whatīs going on here

I am a true FreeBSDer but this is a system that was dumped right on my lap,
with this problem to be solved.

Again, sorry for this inconvinience and thanks for reading.
--
   //|  //||
  // | // ||
-//--//---|| ARIO LOBO
//  //    ||
---------------------------------
mario.lobo@ipad.com.br
http://www.ipad.com.br


[-- Attachment #2 --]
The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any other MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

   ---- File information -----------
     File:  Problem.txt
     Date:  15 Dec 2005, 16:56
     Size:  5077 bytes.
     Type:  Text

[-- Attachment #3 --]
The setup is as follows:

|  Win XP   |    | linux router    OpenswanVPN  |                        | OpenswanVPN linux router  |     | Win 2000 DB server |
| 15.3.83.2 |----| eth1:15.3.83.201 ppp0/ipsec0 |------{ INTERNET }------| eth0/ipsec0 eth1:10.0.0.8 |-----| 10.0.0.25          |



**** ALL DUMPS are from the 15.3.83.201 machine
**** These dumps are from the login attempt sequence from the XP client app, to the DB server on 2000.

**** From the linux router 15.3.83.201 I can telnet fine to Win 2000 port 1502
**** but from Win XP I canīt. From Win XP I can ping any machine on 10.0.0.0/24 with a packet size of up to 1500 bytes


----- DUMPS -----

*************************************************
>tcpdump -v -i eth1 host 15.3.83.2
>tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 96 bytes
*************************************************

03:50:01.570581 IP (tos 0x0, ttl 128, id 24067, offset 0, flags [DF], proto 6, length: 48) 15.3.83.2.1070 > 10.0.0.25.1502: S [tcp sum ok] 28839154:28839154(0) win 8192 <mss 1460,nop,nop,sackOK>


== This is the line thatīs breaking everything. Why the need to frag a 48 bytes packet (see line (**) bellow) ??

03:50:01.570684 IP (tos 0xc0, ttl  64, id 31027, offset 0, flags [none], proto 1, length: 76) 15.3.83.201 > 15.3.83.2: icmp 56: 10.0.0.25 unreachable - need to frag

== 


03:50:01.623863 IP (tos 0x0, ttl  61, id 12144, offset 0, flags [none], proto 6, length: 48) 10.0.0.25.1502 > 15.3.83.2.1070: S [tcp sum ok] 3456775304:3456775304(0) ack 28839155 win 5840 <mss 1460,nop,nop,sackOK>
03:50:01.623958 IP (tos 0x0, ttl 128, id 24323, offset 0, flags [none], proto 6, length: 40) 15.3.83.2.1070 > 10.0.0.25.1502: R [tcp sum ok] 28839155:28839155(0) win 0


== Another attempt

03:50:07.569872 IP (tos 0x0, ttl 128, id 24579, offset 0, flags [DF], proto 6, length: 48) 15.3.83.2.1070 > 10.0.0.25.1502: S [tcp sum ok] 28839154:28839154(0) win 8192 <mss 1460,nop,nop,sackOK>
03:50:07.569971 IP (tos 0xc0, ttl  64, id 31028, offset 0, flags [none], proto 1, length: 76) 15.3.83.201 > 15.3.83.2: icmp 56: 10.0.0.25 unreachable - need to frag

==

03:50:07.623128 IP (tos 0x0, ttl  62, id 12145, offset 0, flags [none], proto 6, length: 48) 10.0.0.25.1502 > 15.3.83.2.1070: S [tcp sum ok] 3462772533:3462772533(0) ack 28839155 win 5840 <mss 1460,nop,nop,sackOK>
03:50:07.623229 IP (tos 0x0, ttl 128, id 24835, offset 0, flags [none], proto 6, length: 40) 15.3.83.2.1070 > 10.0.0.25.1502: R [tcp sum ok] 28839155:28839155(0) win 0


*************************************************
>tcpdump -v -i eth1 host 10.0.0.25
>tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 96 bytes
*************************************************

03:50:51.524370 IP (tos 0x0, ttl 128, id 25603, offset 0, flags [DF], proto 6, length: 48) 15.3.83.2.1071 > 10.0.0.25.1502: S [tcp sum ok] 28892097:28892097(0) win 8192 <mss 1460,nop,nop,sackOK>

== (**)

03:50:51.588365 IP (tos 0x0, ttl  62, id 12147, offset 0, flags [none], proto 6, length: 48) 10.0.0.25.1502 > 15.3.83.2.1071: S [tcp sum ok] 3497515622:3497515622(0) ack 28892098 win 5840 <mss 1460,nop,nop,sackOK>

==

03:50:51.588529 IP (tos 0x0, ttl 128, id 25859, offset 0, flags [none], proto 6, length: 40) 15.3.83.2.1071 > 10.0.0.25.1502: R [tcp sum ok] 28892098:28892098(0) win 0

== Another attempt

03:50:54.464291 IP (tos 0x0, ttl 128, id 26115, offset 0, flags [DF], proto 6, length: 48) 15.3.83.2.1071 > 10.0.0.25.1502: S [tcp sum ok] 28892097:28892097(0) win 8192 <mss 1460,nop,nop,sackOK>
03:50:54.515038 IP (tos 0x0, ttl  62, id 12148, offset 0, flags [none], proto 6, length: 48) 10.0.0.25.1502 > 15.3.83.2.1071: S [tcp sum ok] 3500451534:3500451534(0) ack 28892098 win 5840 <mss 1460,nop,nop,sackOK>

==

03:50:54.515157 IP (tos 0x0, ttl 128, id 26371, offset 0, flags [none], proto 6, length: 40) 15.3.83.2.1071 > 10.0.0.25.1502: R [tcp sum ok] 28892098:28892098(0) win 0
03:51:00.463564 IP (tos 0x0, ttl 128, id 26627, offset 0, flags [DF], proto 6, length: 48) 15.3.83.2.1071 > 10.0.0.25.1502: S [tcp sum ok] 28892097:28892097(0) win 8192 <mss 1460,nop,nop,sackOK>
03:51:00.516300 IP (tos 0x0, ttl  62, id 12149, offset 0, flags [none], proto 6, length: 48) 10.0.0.25.1502 > 15.3.83.2.1071: S [tcp sum ok] 3506451385:3506451385(0) ack 28892098 win 5840 <mss 1460,nop,nop,sackOK>
03:51:00.516420 IP (tos 0x0, ttl 128, id 26883, offset 0, flags [none], proto 6, length: 40) 15.3.83.2.1071 > 10.0.0.25.1502: R [tcp sum ok] 28892098:28892098(0) win 0
03:51:12.462154 IP (tos 0x0, ttl 128, id 27139, offset 0, flags [DF], proto 6, length: 48) 15.3.83.2.1071 > 10.0.0.25.1502: S [tcp sum ok] 28892097:28892097(0) win 8192 <mss 1460,nop,nop,sackOK>
03:51:12.517629 IP (tos 0x0, ttl  62, id 12150, offset 0, flags [none], proto 6, length: 48) 10.0.0.25.1502 > 15.3.83.2.1071: S [tcp sum ok] 3518448416:3518448416(0) ack 28892098 win 5840 <mss 1460,nop,nop,sackOK>
03:51:12.517756 IP (tos 0x0, ttl 128, id 27395, offset 0, flags [none], proto 6, length: 40) 15.3.83.2.1071 > 10.0.0.25.1502: R [tcp sum ok] 28892098:28892098(0) win 0
help

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