Re: [gentoo-user] Gentoo router: Conntrack table full

["Andrey Falko" <ma3oxuct@gmail.com>]

On Sat, Mar 22, 2008 at 11:16 PM, Dan Cowsill <danthehat@gmail.com> wrote:
> Hi folks,
>
>  Today I had some really serious problems with my Gentoo router.  I
>  could ping it, and all the network connections were in place and
>  functional, but no outside access.  I looked into it and found that
>  the syslog was flooded with this:
>
>
>  Mar 22 21:25:55 localhost kernel: nf_conntrack: table full, dropping packet.
>  Mar 22 21:26:00 localhost kernel: printk: 11 messages suppressed.
>  Mar 22 21:26:00 localhost kernel: nf_conntrack: table full, dropping packet.
>  Mar 22 21:26:05 localhost kernel: printk: 16 messages suppressed.
>
>
>  These messages spanned a full 20 hours of the log.  I understand that
>  conntrack is the connection tracking system that iptables uses.  I
>  also understand that its maximum is something on the order of 65000
>  simultaneous connections.  For a simple home network, I think we can
>  agree that I would probably never approach this number of connections
>  with normal use.
>
>  So my question is this:  what could have caused the router's
>  connection tracker to overflow?
>  --
>  Dan Cowsill
>  http://www.danthehat.net
>  --
>  gentoo-user@lists.gentoo.org mailing list
>
>

What type of 'net services do you run between your home network and
the outside? Is there a possibility that someone out have put a denial
of service attack on you?
-- 
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