[buug] Musical default gateways

[Bruce Ferrell]

You didn't mention it, but I'm betting your network config comes from 
DHCP.  If so, when the address lease expires and your box requests a 
renewal, the linksys answers and reconfigures your network settings... 
Just a guess

Skip Evans wrote:

> Here's a weird one,
> 
> Last night at the BUUG meeting I showed a couple of 
> people an odd thing going on on my BSD box. 
> 
> Our network has a Flowpoint 2200 as the first thing coming from Earthlink. 
> That in turn connects to a Linksys router. My BSD box comes 
> off the Flowpoint; it is not connected directly to the Linksys.
> 
> In the file rc.comf I have a line that reads:
> defaultrouter="66.47.51.73" 
> 
> As I understand the manual, this value will be used for the gateway at 
> startup.
> 
> It's been working fine for a few weeks, but yesterday
> a friend who is doing some work on the box called
> and said he could no longer access the box. I did
> a netstat -r and it told me the default gateway was
> set to 192.168.1.1 ... The IP address of the Linksys.
> 
> Today I did the following commands to fix it:
> route delete default
> route add default 66.47.51.37
> 
> When I did a netsat -r it showed be the .37
> value as the default gateway. I even rebooted
> the machine to see what it would come up with,
> and it came up with the .37 value.
> 
> Then in the middle of the day today, my friend calls
> up and says he can't get at the box again and lo and 
> behold, the Linksys IP was again the default gateway.
> 
> The machine had not been restarted, and, in fact, no one
> had done anything to it beyond my setting the gateway to
> the proper value.
> 
> I've grepped the /etc directory for any reference to the Linksys
> IP, but it comes up with nothing.
> 
> Anyone have any idea what is happening here?
> 
> Thanks!
> 
> 
> 
> 
> Skip Evans
> Network Project Director
> National Center for Science Education
> 420 40th St, Suite 2
> Oakland, CA 94609
> 510-601-7203
> 510-601-7204 (fax)
> 800-290-6006
> evans at ncseweb.org
>  http://www.ncseweb.org
> 
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