redhat 9 - one machine no longer gets network access beyond router

From: Umilla Quant (goojoygoo.20.joek_at_spamgourmet.com)
Date: 12/09/03 

Date: 9 Dec 2003 11:16:46 -0800

Hi,

I have a small home network with 2 machines (desktop and laptop, both
with RedHat 9) and a dlink router/hub/access point. Both machines
access the internet throught ethernet connections to the router. Both
had been working fine with no problems.

Then I put a pcmcia modem on the laptop so I could use it to access
the internet on the road. I disconnected the laptop from the ethernet
and set up KPPP to use the modem to acces the internet. Once I got
this set up, I took out the modem and reattached the laptop to the
ethernet network.

Now, however, the laptop will not access the internet or anything
beyond the router. The laptop can ping the router, and it can ping the
desktop,but when I try to ping a machine on the internet beyond the
router, I get:

$ ping yahoo.com
PING yahoo.com (66.218.71.198) 56(84) bytes of data.

--yahoo.com ping statistics---
20 packets transmitted, 0 received, 100% packet loss

(so the router [which is also the dns server] successfully resolves
the IP address of the remote machine and sends that to the laptop but
the laptop cannot send pings [or receive pings?] to/from the remote
machine)

I can still ping machines on the internet from the desktop machine
with no problem.

So I presume what happened was that setting up kppp changed some
configuration files that had been working so now they don't. I haven't
been able to figure out what, though.

Both machines have similar /sbin/route outputs:

desktop$ /sbin/route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
139.254.0.0 * 255.255.0.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default router 0.0.0.0 UG 0 0 0 eth0
desktop$

laptop$ /sbin/route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
139.254.0.0 * 255.255.0.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default router 0.0.0.0 UG 0 0 0 eth0
laptop$

...and idential resolv.conf files:

$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search localhost.localdomain
nameserver 192.168.0.1
$

Does anybody know what went wrong and how to fix it?

Relevant Pages

  • Re: how do i configure??
    ... possible that if you connect the Internet input of a router to the ICS ... NIC on the laptop, ...
    (microsoft.public.windowsxp.network_web)
  • Re: how do i configure??
    ... the ICS be 'only' be able to access the 'one' necessary site. ... like a router for the other computers. ... 'limited' to what IP address that the laptop is viewing or are the ... be on in order for any of the other computers to access the Internet), ...
    (microsoft.public.windowsxp.network_web)
  • Re: XP SP2, Cant access internet with 1 PC out of 3 updated
    ... w/out the router? ... Uninstall SP2 again and see what happens. ... > I can ping the rounter from this problem PC (Toshiba laptop), ... I can't access the internet from the Toshiba. ...
    (microsoft.public.windowsxp.general)
  • Re: Black Ice and smb
    ... That way you will not get the message from BlackIce. ... behind the router. ... Since you are behind two firewalls with both your machines, ... When you're connected to the Internet ...
    (comp.security.firewalls)
  • Re: how do i configure??
    ... However, it's possible that if you connect the Internet input of a router to the ICS NIC on the laptop, may be able to configure the router to restrict access. ...
    (microsoft.public.windowsxp.network_web)