[syslog-ng] Lost packets; UDP Checksum (chksum) errors; forwarding - source spoofing; libnet bug

Balazs Scheidler bazsi at balabit.hu
Wed Aug 29 15:06:29 CEST 2007


On Wed, 2007-08-29 at 06:58 -0600, Marvin.Nipper at Stream.com wrote:
> OK… I've only posted here a couple of times, but I've googled this
> list (for help) extensively in the past.  Before I waste everyone's
> time, I just wanted to find out if I'm the only one who "didn't
> already know" that there's a nasty bug in libnet-1.1.2.1, such that
> anybody doing source-spoofed forwarding of UDP-based syslog packets
> will likely end up losing large volumes of packets in the process (in
> my case a 2/3 loss of packets).
> 
> Again… I thought that I had searched the mailing list archives
> properly, and that I didn't see a mention of this issue (as I've been
> fighting my way through figuring this out, over a multi-week period),
> BUT, as this would seem to impact a lot of syslog-ng users, I keep
> thinking that I've just missed something, and everyone else already
> knows about this.  Before I waste time writing a detailed message on
> the topic, I figured that I'd ask first.

I would appreciate if you could write about this. I don't know about
anything related.

-- 
Bazsi



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