Strange kernel messages

Erik Trulsson ertr1013 at student.uu.se
Sat May 14 00:35:52 PDT 2005


On Sat, May 14, 2005 at 09:14:20AM +0200, Colin J. Raven wrote:
> Hi all!
> I occasionally get these in my daily security run output (which is 
> worrying in itself)
> 
> Limiting closed port RST response from 1629 to 200 packets per second
> 
> the number of these can range from one or two, to sometimes 25 - 30 
> although the latter case is rarer. Usually there's about six or so. 
> These don't arrive every day, usually about once per week on average.
> 
> Is this an OS response to an attempted attack, limiting potential DDOS 
> damage? That's how I'm reading it, but of course I'm guessing. If that 
> *is* so, what mechanism is doing this?
> 
> FreeBSD 4.11 STABLE


See the FAQ:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/networking.html#ICMP-RESPONSE-BW-LIMIT




-- 
<Insert your favourite quote here.>
Erik Trulsson
ertr1013 at student.uu.se


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