Date: Fri, 28 Jan 2000 06:41:44 -0800 (PST) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: mistwolf@mushhaven.net (Jamie Norwood) Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Odd DoS Message-ID: <200001281441.GAA81362@gndrsh.dnsmgr.net> In-Reply-To: <20000128063240.A80784@mushhaven.net> from Jamie Norwood at "Jan 28, 2000 06:32:41 am"
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> Whooooops! My bad. *hangs head in shame* Hee. S'what I get for
> posting a half hour before my last shift of the week ends. Didn't
> read far enough. But I bet, still, that what I said is what he
> was thinking. ;)
Yea.. and it would explain arp having lots of trouble tooo... oh..
and I just found another way to generate arplookup errors that I
had forgotten about.
Sharing a hub/switch with routers running multicast routing protocols
can lead to these if you have 2 subnets sharing the same logical
network link layer and try to run say something like ospf on both
subnet address ranges.
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
arplookup B.B.B.x failed: host is not on local network
Seen on a A.A.A.x box caused by starting ospf on a B.B.B.x box
sharing a hub with an ospf allready running on A.A.A.x but I
doubt that this is his problem, I think we found it above with
the missuse of dest-addr on ethernet maybe...
> Jamie
>
>
> On Fri, Jan 28, 2000 at 06:33:09AM -0800, Rodney W. Grimes wrote:
> > Not on epX it ain't!!!
> >
> >
> > >From man ifconfig:
> > dest_address
> > Specify the address of the correspondent on the other end of a
> > point to point link.
> >
> > gndrsh:root {1327}# !1324
> > ifconfig de0 inet 194.134.130.170 194.134.128.1 netmask 255.255.252.0
> > gndrsh:root {1328}# Jan 28 06:30:34 gndrsh gated[108]: if_rtup: UP route for interface de0 194.134.130.170/255.255.252
> >
> > gndrsh:root {1328}# ifconfig -a
> > de0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> > inet 194.134.130.170 netmask 0xfffffc00 broadcast 194.134.128.1
> > ^^^^^^^^^^^^^
> > ether 00:c0:f0:04:2c:d4
> > media: autoselect (10base5/AUI) status: active
> > supported media: autoselect 10base5/AUI 10base2/BNC 10baseT/UTP <full-duplex> 10baseT/UTP
> >
> > ...
> > That 194.134.128.1 actual screws up the broadcast address, which is what
> > the second argument to the underlying ioctl gets used for when it is
> > set!!!
> >
> >
> > --
> > Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net
>
--
Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net
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