Strange entries in /var/log/messages

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* Strange entries in /var/log/messages
@ 2004-03-01 12:26 Ray Leach
  2004-03-01 12:29 ` Alexis
  2004-03-01 12:31 ` Antony Stone
  0 siblings, 2 replies; 5+ messages in thread
From: Ray Leach @ 2004-03-01 12:26 UTC (permalink / raw)
  To: Netfilter Mailing List

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Hi All

Can anyone explain why a machine on 10.0.0.10/24 would try and
communicate with another machine 10.0.0.4/24 via a router?
Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17562 DF
PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0
Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17563 DF
PROTO=TCP SPT=4602 DPT=158 WINDOW=64240 RES=0x00 SYN URGP=0
Mar  1 14:19:40 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17593 DF
PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0

What is this? Port 158 and 159 apparently belong to
BackupExec/NetBackup. 10.0.0.10 is our backup server, but why does it
try and talk to 10.0.0.4 via the default router?



-- 
--
Raymond Leach <raymondl@knowledgefactory.co.za>
Network Support Specialist
http://www.knowledgefactory.co.za
"lynx -source http://www.rchq.co.za/raymondl.asc | gpg --import"
Key fingerprint = 7209 A695 9EE0 E971 A9AD  00EE 8757 EE47 F06F FB28
--

[-- Attachment #2: This is a digitally signed message part --]
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^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: Strange entries in /var/log/messages
  2004-03-01 12:26 Strange entries in /var/log/messages Ray Leach
@ 2004-03-01 12:29 ` Alexis
  2004-03-01 12:34   ` Alexis
  2004-03-01 12:31 ` Antony Stone
  1 sibling, 1 reply; 5+ messages in thread
From: Alexis @ 2004-03-01 12:29 UTC (permalink / raw)
  To: Ray Leach; +Cc: Netfilter Mailing List

because a more specific static route?



On Mon, 2004-03-01 at 09:26, Ray Leach wrote:
> Hi All
> 
> Can anyone explain why a machine on 10.0.0.10/24 would try and
> communicate with another machine 10.0.0.4/24 via a router?
> Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17562 DF
> PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0
> Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17563 DF
> PROTO=TCP SPT=4602 DPT=158 WINDOW=64240 RES=0x00 SYN URGP=0
> Mar  1 14:19:40 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17593 DF
> PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0
> 
> What is this? Port 158 and 159 apparently belong to
> BackupExec/NetBackup. 10.0.0.10 is our backup server, but why does it
> try and talk to 10.0.0.4 via the default router?
-- 
Tus problemas no se pueden resolver en el mismo
nivel mental que ten√≠as cuando los creaste. 
		Albert Einstein



^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: Strange entries in /var/log/messages
  2004-03-01 12:29 ` Alexis
@ 2004-03-01 12:34   ` Alexis
  0 siblings, 0 replies; 5+ messages in thread
From: Alexis @ 2004-03-01 12:34 UTC (permalink / raw)
  To: Netfilter Mailing List

static or dynamic (learned from a routing protocol) but more specific.


On Mon, 2004-03-01 at 09:29, Alexis wrote:
> because a more specific static route?
> 
> 
> 
> On Mon, 2004-03-01 at 09:26, Ray Leach wrote:
> > Hi All
> > 
> > Can anyone explain why a machine on 10.0.0.10/24 would try and
> > communicate with another machine 10.0.0.4/24 via a router?
> > Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> > SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17562 DF
> > PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0
> > Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> > SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17563 DF
> > PROTO=TCP SPT=4602 DPT=158 WINDOW=64240 RES=0x00 SYN URGP=0
> > Mar  1 14:19:40 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> > SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17593 DF
> > PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0
> > 
> > What is this? Port 158 and 159 apparently belong to
> > BackupExec/NetBackup. 10.0.0.10 is our backup server, but why does it
> > try and talk to 10.0.0.4 via the default router?
-- 
Tus problemas no se pueden resolver en el mismo
nivel mental que ten√≠as cuando los creaste. 
		Albert Einstein



^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: Strange entries in /var/log/messages
  2004-03-01 12:26 Strange entries in /var/log/messages Ray Leach
  2004-03-01 12:29 ` Alexis
@ 2004-03-01 12:31 ` Antony Stone
  2004-03-01 12:50   ` Ray Leach
  1 sibling, 1 reply; 5+ messages in thread
From: Antony Stone @ 2004-03-01 12:31 UTC (permalink / raw)
  To: Netfilter Mailing List

On Monday 01 March 2004 12:26 pm, Ray Leach wrote:

> Hi All
>
> Can anyone explain why a machine on 10.0.0.10/24 would try and
> communicate with another machine 10.0.0.4/24 via a router?
> Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17562 DF
> PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0

Bad routing table / netmask on 10.0.0.10?
Bad ARP cache entry?
10.0.0.4 sending silly ICMP redirects?
Strange network cabling arrangement :) ?

Regards,

Antony.

-- 
The truth is rarely pure, and never simple.

 - Oscar Wilde

                                                     Please reply to the list;
                                                           please don't CC me.



^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: Strange entries in /var/log/messages
  2004-03-01 12:31 ` Antony Stone
@ 2004-03-01 12:50   ` Ray Leach
  0 siblings, 0 replies; 5+ messages in thread
From: Ray Leach @ 2004-03-01 12:50 UTC (permalink / raw)
  To: Netfilter Mailing List

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On Mon, 2004-03-01 at 14:31, Antony Stone wrote:
> On Monday 01 March 2004 12:26 pm, Ray Leach wrote:
> 
> > Hi All
> >
> > Can anyone explain why a machine on 10.0.0.10/24 would try and
> > communicate with another machine 10.0.0.4/24 via a router?
> > Mar  1 14:19:37 firefly kernel: DROP FORWARD INTERNAL: IN=eth2 OUT=eth2
> > SRC=10.0.0.10 DST=10.0.0.4 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=17562 DF
> > PROTO=TCP SPT=4601 DPT=159 WINDOW=64240 RES=0x00 SYN URGP=0
> 
> Bad routing table / netmask on 10.0.0.10?
> Bad ARP cache entry?
> 10.0.0.4 sending silly ICMP redirects?
> Strange network cabling arrangement :) ?
> 
Thanks for the pointers, checked all the above ...

Strange thing is that it (10.0.0.10) is communicating with 10.0.0.15
correctly (i.e. not via the router, but directly).

> Regards,
> 
> Antony.
-- 
--
Raymond Leach <raymondl@knowledgefactory.co.za>
Network Support Specialist
http://www.knowledgefactory.co.za
"lynx -source http://www.rchq.co.za/raymondl.asc | gpg --import"
Key fingerprint = 7209 A695 9EE0 E971 A9AD  00EE 8757 EE47 F06F FB28
--

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[-- Type: application/pgp-signature, Size: 189 bytes --]

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2004-03-01 12:50 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2004-03-01 12:26 Strange entries in /var/log/messages Ray Leach
2004-03-01 12:29 ` Alexis
2004-03-01 12:34   ` Alexis
2004-03-01 12:31 ` Antony Stone
2004-03-01 12:50   ` Ray Leach

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