I've never seen a packet bounce between routers due to a filter. As a
matter-o-fact, even if the host was down the router shouldn't pass the
packet back. In most cases a router only passes a packet back when it
doesn't know how to get to the network the host is on and the router has a
default gateway pointing back to the router that sent the packet to him.
Just to make sure I'm right, I asked one of our CCIE routing bubbas and he
basically agreed with me. I may only have a CCNA but I know my routing.
David Ishmael, CCNA, IVCP
Senior Network Management Engineer
Windward Consulting Group, Inc.
Phone: (703) 283-7564
Pager: (888) 910-7094
eFax: (425) 969-4707
Fax: (703) 351-9428
mailto:[EMAIL PROTECTED]
mailto:[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of David Lang
Sent: Thursday, February 15, 2001 1:32 PM
To: David Ishmael
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED];
[EMAIL PROTECTED]; [EMAIL PROTECTED];
[EMAIL PROTECTED]
Subject: RE:
this type of traceroute can also result from a router that blocks the
traceroute packets. if this is the case you can still get to the machine
even though traceroute never finishes.
David Lang
On Thu, 15 Feb 2001, David Ishmael
wrote:
> Date: Thu, 15 Feb 2001 11:02:11 -0500
> From: David Ishmael <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED], [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED], [EMAIL PROTECTED],
> [EMAIL PROTECTED]
> Subject: RE:
>
> hahahaha, routing loop. Courtesy call the ISP and let em know they
screwed
> up a route between 211.103.56.1 and 211.103.56.2. I always love seeing
> stuff like that...job security.
>
> David Ishmael, CCNA, IVCP
> Senior Network Management Engineer
> Windward Consulting Group, Inc.
> Phone: (703) 283-7564
> Pager: (888) 910-7094
> eFax: (425) 969-4707
> Fax: (703) 351-9428
> mailto:[EMAIL PROTECTED]
> mailto:[EMAIL PROTECTED]
>
>
>
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of
> [EMAIL PROTECTED]
> Sent: Wednesday, February 14, 2001 12:44 PM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED];
> [EMAIL PROTECTED]
> Subject:
>
>
> I recently ran a tracert on a IP that had been scanning some of the
systems
> I am
> responsible for and received some strange results.
> I was wondering if any of you could shed some light on this Issue.
>
> -------------------------------------------------------------------------
> From a Windows system:
> Tracing route to 211.103.59.95 over a maximum of 30 hops
> 1 ...
> 2 ...
> 3 ...
> 4 ...
> 5 ...
> 6 ...
> 7 ....
> 8 <10 ms <10 ms <10 ms 195.at-0-0-0.TR1.DCA8.ALTER.NET
> [152.63.32.158]
> 9 63 ms 94 ms 78 ms 115.at-6-1-0.TR3.SCL1.ALTER.NET
> [152.63.3.194]
> 10 78 ms 78 ms 78 ms 399.ATM6-0.XR1.PAO1.ALTER.NET
[152.63.48.217]
> 11 63 ms 78 ms 78 ms 189.ATM5-0.GW7.PAO1.ALTER.NET
[152.63.49.153]
> 12 62 ms 78 ms 94 ms hkt-gw2.customer.ALTER.NET
[157.130.197.190]
> 13 63 ms 79 ms 93 ms g1-0.paix04.hkt.net [202.84.128.172]
> 14 1313 ms 1297 ms 1296 ms p5-0.yckbr03.hkt.net [202.84.128.221]
> 15 1266 ms 1297 ms 1265 ms 202.84.140.1
> 16 1265 ms 1282 ms 1265 ms pos7-0.tmhstcbr01.hkt.net [207.176.97.129]
> 17 1266 ms 1265 ms 1344 ms 207.176.96.68
> 18 1359 ms 1359 ms 1375 ms 207.176.98.38
> 19 1485 ms 1375 ms 1375 ms 211.103.6.146
> 20 1391 ms 1375 ms 1421 ms 211.103.56.2
> 21 1375 ms 1375 ms 1360 ms 211.103.56.1
> 22 1360 ms 1390 ms 1344 ms 211.103.56.2
> 23 1328 ms 1328 ms 1375 ms 211.103.56.1
> 24 1406 ms 1407 ms 1406 ms 211.103.56.2
> 25 1422 ms 1453 ms 1484 ms 211.103.56.1
> 26 1312 ms 1281 ms 1219 ms 211.103.56.2
> 27 1157 ms 1140 ms 1141 ms 211.103.56.1
> 28 1141 ms 1125 ms 1109 ms 211.103.56.2
> 29 1125 ms 1125 ms 1110 ms 211.103.56.1
> 30 1203 ms 1188 ms 1187 ms 211.103.56.2
>
> --------------------------------------------------------------------------
--
> ----------
> Brett J. Carpenter
>
>
>
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