From: Marek Kierdelewicz <marek@piasta.pl>
To: Ed W <lists@wildgooses.com>
Cc: Netfilter <netfilter@vger.kernel.org>
Subject: Re: High accuracy bandwidth accounting?
Date: Sat, 14 May 2011 11:48:27 +0200 [thread overview]
Message-ID: <20110514114827.768b985d@catus> (raw)
In-Reply-To: <4DC8775D.1080007@wildgooses.com>
Hi,
Firstly I'd like to say you have an interesting use case.
>An example seems to be to cause a name lookup via dnsmasq. For whatever
>reason this does two simultaneous dns requests to both configured dns
>servers. One reply comes back slightly quicker than the other and the
>slower reply appears to cause a local ICMP unreachable response to be
>generated. Everything is logged *except* the data for the ICMP
>unreachable response?
You should consider disabling icmp responses:
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
... and/or limiting/disabling unreachable responses:
echo 1 > /proc/sys/net/ipv4/icmp_ratelimit
Agressive ratelimiting will cause your router as a hop in traceroute to
show near 100% loss, but other then that you'll save bandwidth.
Best regards,
Marek Kierdelewicz
prev parent reply other threads:[~2011-05-14 9:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-09 14:12 High accuracy bandwidth accounting? Ed W
2011-05-09 21:45 ` Andrew Beverley
2011-05-09 22:07 ` Ed W
2011-05-09 22:16 ` Andrew Beverley
2011-05-09 22:49 ` Ed W
2011-05-11 14:30 ` Ed W
2011-05-12 0:01 ` Andrew Beverley
2011-05-12 22:17 ` Ed W
2011-05-12 22:27 ` Andrew Beverley
2011-05-09 23:23 ` Ed W
2011-05-14 9:23 ` Andrew Beverley
2011-05-14 13:36 ` Ed W
2011-05-14 16:29 ` Andrew Beverley
2011-05-14 22:33 ` Jan Engelhardt
2011-05-15 7:23 ` Andrew Beverley
2011-05-15 9:08 ` Jan Engelhardt
2011-05-16 6:43 ` Andrew Beverley
2011-05-16 7:23 ` Jan Engelhardt
2011-05-22 21:22 ` Andrew Beverley
2011-05-16 14:35 ` Ed W
2011-05-16 14:59 ` Jan Engelhardt
2011-05-16 16:53 ` Ed W
2011-05-14 9:48 ` Marek Kierdelewicz [this message]
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