[NTLUG:Discuss] disappearing default route

[Chris Cox]

jeremyb at univista.com wrote:
>   hey folks,
>   I have a REdHAt 7.1 i386 machine on a LAN with the following simple route
> table.
> 
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface
> 192.168.1.0     0.0.0.0         255.255.255.0   U        40 0          0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U        40 0          0 lo
> 0.0.0.0         192.168.1.1     0.0.0.0         UG       40 0          0
> eth0
> 
>    up until last night it had a static IP of 192.168.1.3 and was completely
> behind my linksys router.
>   I changed eth0 to use DHCP last night using netconfig AND placed the
> machine in the
> linksys "DMZ" using the "DMZ port" on the router. 

I really didn't think Linksys supported the idea of a DMZ'd dhcp host.
I'd assign it something static.

> Everything seemed to work
> fine until about 10 minutes ago when I suddenly had had no available
> internet connection.
> It wasn't too hard to figure out the problem was no default route.  
> yes,  I said no default route....  it was there before and haven't been
> monkeying with 
> the table or the NIC.  My QUESTION IS, why might it disappear like that?
> I added it back without issue.

Configure yourself statically.  Hardcode your gateway.
Hope you know what you're doing placing the machine in the DMZ.
Happy hacking (literally).