Re: Routes disappear [WAS Re: Alpha: SYN-cookie problem. routes
Andi Kleen (ak@muc.de)
Sat, 13 Mar 1999 07:05:32 +0100
On Sat, Mar 13, 1999 at 01:53:33AM +0100, Michael Hasenstein wrote:
> ---kuznet@ms2.inr.ac.ru wrote:
> > > Another thing I found not very efficient is that we are not garbage
> > > collecting all the unused routes, but 1 per hash chain. I had only a
> > > fast read to the code so I hope I have understood correctly.
> >
> > It is not another thing, it is exactly this thing 8)8)8)
> >
> > Well, if you want to dig in this, please, get
> > ftp://ftp.inr.ac.ru/ip-routing/kernel-ss* better.
>
> I have done the
> echo 0 > /proc/sys/net/ipv4/route/gc_min_interval
> on the machine. Looks like it's crashed again right now, can't check,
> because I'd have to login ;-) Since it run ok all day and the
> syn-attacks have been going on very regularly for 3 months according
> to the logfiles I guess they're the reason again (which reminds me to
> ask the owner of the machine if he really had the crashes for 3 months
> or if this is new).
Please note that the message does not mean that there is really a syn flood
attack - it only means that for some time there are more connections comming
in than the server can accept, which can be a normal condition on a loaded
server.
-Andi
--
This is like TV. I don't like TV.
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