[clug] wierd messages in the syslog

[Joel Pearson]

Hey,

Thanks for the suggestions, it turns out this error was fairly regular
rougly every 15 minutes.  So I got ethereal to monitor the traffic around
about the time the error shows up and it turns out samba is broadcasting
itself to all the interfaces, including the internet one.  So I added an
interfaces = eth1 to the samba conf, and the errors seem to have gone away.

Thanks

-Joel

"Andrew Pollock" <andrew-clug at andrew.net.au> wrote
in message news:20040426060244.GA22060 at daedalus.andrew.net.au...
> Hi Joel,
>
> /usr/include/netinet/ip_icmp.h sez that's destination unreachable, port
> unreachable.
>
> I'd hazard a guess and say that you're getting portscanned (fact of life
on
> the Internet), and you are correctly responding with an ICMP destination
> unreachable, port unreachable, for the UDP ports that you're not listening
> on.
>
> As for why it's getting syslogged ad infinetium, I really don't know. The
> fact that it's sending them to your broadcast address suggests that either
> you've got your subnet mask wrong, and your broadcast address isn't really
> your broadcast address, and whatever you've got set as your broadcast
> address is doing the portscanning (your ISP?), or something else is afoot.
>
> If you have the inclination, you could run Ethereal, and look at the ICMP
> traffic you're sending back, and it'll include information about the
> original packet that it's sending an unreachable response about.
>
> Hope this helps.
>
> regards
>
> Andrew
>
> On Mon, Apr 26, 2004 at 02:18:13AM +1000, Joel Pearson wrote:
> > Hey,
> >
> > I recently installed Fedora Core 1 and my syslog is filling up with lots
of
> > these error messages:
> >
> > 203.16.208.62 sent an invalid ICMP type 3, code 3 error to a broadcast:
> > 203.16.208.63 on eth0
> >
> > sometimes there is only 1 every few minutes other times it is a couple a
> > minute.
> >
> > I'm running bridged adsl and my ifcfg-eth0 script is as follows:
> > [root at office root]# cat
/etc/sysconfig/network-scripts/ifcfg-eth0
> > DEVICE=eth0
> > ONBOOT=yes
> > BOOTPROTO=static
> > IPADDR=203.16.208.62
> > NETMASK=255.255.255.252
> > GATEWAY=203.16.208.61
> >
> > I had a look in google and there were people asking similar questions,
but
> > with no answers.
> >
> > Thanks
> >
> > -Joel
> >
> >
>