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Re: DHCP & reverse DNS in Linksys LAN environment



On Sun, Jun 02, 2002 at 11:28:51AM -0500, Jamin W. Collins wrote:
> On Sun, 2 Jun 2002 11:12:59 -0500
> "Judith Elaine Bush" <debian@grey-cat.com> wrote:
> 
> > We have a home LAN behind a Linksys DSL router (model BEFSER41). 
> (snip)
> > The Debian box can ping a laptop on the LAN successfully (by IP
> > address); it cannot ping the outside world. A laptop can ping the
> > Debian box successfully (by IP address), as well as anywhere else in
> > the outside world .
> (snip)
> > I've commented out all his nameservers from
> > resove.conf and confirmed I my ISP's nameserver specified. 
> 
> So, you're using the Linksys DSL router to provide NAT'd access out to the
> Internet, correct?  All DHCP assigned systems can ping internal and
> external hosts, correct?  

Yes & yes.

> Sounds like the statically assigned Debian
> system doesn't have a default gateway assigned.  What does "/sbin/route
> -n" return on the Debian system?

The answer is below. Should the Gateway be the IP address of the
Linksys box? I'll be trying that before I leave in 15 minutes. Thanks
very much for the quick pointer.

judith


Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         192.168.1.250   0.0.0.0         UG    0      0        0 eth0


When I looked at this a few weeks ago I noticed the loopback wasn't
there. I added it by hand so the output of route -n was as follows,
but had the same problems (not surprisingly).

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
127.0.0.1       0.0.0.0         255.255.255.255 UH    0      0        0 lo
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         192.168.1.250   0.0.0.0         UG    0      0        0 eth0

And FYI...

$/sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:A0:CC:64:6B:97
          inet addr:192.168.1.30  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6115 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3797 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          Interrupt:10 Base address:0x9000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:49 errors:0 dropped:0 overruns:0 frame:0
          TX packets:49 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0



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