Odd networking problem

William Park opengeometry-FFYn/CNdgSA at public.gmane.org
Sat Mar 19 03:36:05 UTC 2011


On Fri, Mar 18, 2011 at 11:22:33PM -0400, Peter King wrote:
> Here's one for the experts.
> 
> I have a netbook running OS X. The ethernet connection to my router is reported
> to be good, but I can't ping the router, much less connect to the net. Nor can I
> see the netbook from other computers on the LAN.
> 
> Normally, I'd think this was a DNS problem. As far as I can tell (I don't know 
> much about OS X), it isn't; the nameservers work for all the other computers on
> the network, so they should be okay.
> 
> Routing? Well, according to netstat -nr, the default route does have the IP address
> of the router. I tried adding the default route manually anyway, just to see, but
> no difference.
> 
> At this point I'd suspect the cables or the hardware. The cables work fine with
> other computers, though. To check the hardware on the netbook I put sysrescuecd
> on a USB stick and booted from that. The ethernet connection runs perfectly with
> no fuss or feathers at all.
> 
> Now I'm at that place known to us all: Wit's End. Any suggestions for what to try
> next? (Other than "install Linux instead of OS X" -- it's my daughter's computer,
> not mine, otherwise I would have done that long ago.)

Firewall?  Try 'traceroute'.
-- 
William
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