linux-kernel - Re: How to find a sick router with 2.6.17+ and tcp_window

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Sat, 19 Aug 2006 18:42:18 +0200
From:	Ralf Hildebrandt <Ralf.Hildebrandt@...rite.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: How to find a sick router with 2.6.17+ and tcp_window_scaling enabled

* Mark Reidenbach <m.reidenbach@...rytruckjob.com>:
> I had made an earlier post concerning very poor network performance 
> after upgrading to 2.6.17 and later kernels.  The solution provided by 
> the e1000 developers was that it was in fact a change to the default tcp 
> window scaling settings and that there was a router somewhere between my 
> computer and its destination.

Are you looking for a traceroute-/mtr-like tool that sends specially
crafted packets and finally comes up with a message like "the router
between x and y is broken"?

-- 
Ralf Hildebrandt (i.A. des IT-Zentrums)         Ralf.Hildebrandt@...rite.de
Charite - Universitätsmedizin Berlin            Tel.  +49 (0)30-450 570-155
Gemeinsame Einrichtung von FU- und HU-Berlin    Fax.  +49 (0)30-450 570-962
IT-Zentrum Standort CBF                 send no mail to spamtrap@...rite.de
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/