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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110514114827.768b985d@catus \
--to=marek@piasta.pl \
--cc=lists@wildgooses.com \
--cc=netfilter@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.