Why do packets to 127.255.255.255 cause dial-up?
dot at dotat.at
Fri Mar 31 02:25:51 BST 2000
Nik Clayton <nik at freebsd.org> wrote:
> Ah, indeed. I hate it when I can't see the wood for the trees. Nothing
> a quick
> route add -net 127 lo0
> can't solve. This then gives the expected:
> Destination Gateway Flags Refs Use Netif Expire
> default 188.8.131.52 UGSc 20 668 tun0
> 127 lo0 USc 0 0 lo0
> 127.0.0.1 127.0.0.1 UH 0 0 lo0
> lines. And no packets wending their way down tun0 by mistake.
> The more interesting question is why is this happening?
There is explicit code in the kernel code for ifconfig that says "Oh,
this is a loopback address so you don't want a network route." I had
to remove that in the NETALIAS patch (PR#12071) because the loopback
interface is where NETALIAS interfaces are usually configured :-)
f.a.n.finch fanf at demon.net dot at dotat.at
278 shower from the clocktower
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