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Re: can't ping local 'net, even with no firewall

On Mon, Jul 23, 2001 at 09:11:41AM +0200, Michael Wood wrote:
> Use "route -n" or "netstat -rn" to disable DNS, /etc/hosts,
> /etc/networks lookups.

% netstat -rn        
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface UH       40 0          0 ppp0 UH       40 0          0 eth0   U        40 0          0 eth0   U        40 0          0 eth0         UG       40 0          0 ppp0

Just for clarity, the address of eth0 is, and the other
computer on the LAN is  You can see that I tried to
explicitly add the route to

> About your pinging problem, does it actually time out or does it
> just appear not to do anything?

It looks like it's sending packets, just not receiving them.  And if I
watch the activity lights on my switch, they are flashing.

> If the latter, try "ping -n" to disable DNS lookups.  (Depending
> on your ping it may be trying to resolve your 192.168 IP
> addresses before printing the responses.)

% ping -n
PING ( 56 data bytes

<here's where I wait a while, then press CTRL-C>

--- ping statistics ---
14 packets transmitted, 0 packets received, 100% packet loss

> You could also try running tcpdump on both boxes while pinging
> to see what's going on.

The other box is a Windows NT box (so I'm even more in the dark there :(

Also, I *can* ping localhost (both "ping localhost" and "ping"
work fine), and I can even ping Internet hosts when I have ppp connection

About a week ago this worked: I could ping the other computer, and it
could load pages off my webserver, and I could even get NAT working.

Any more thoughts?


Matt Garman, garman@uiuc.edu
"I'll tip my hat to the new constitution, Take a bow for the new revolution
 Smile and grin at the change all around, Pick up my guitar and play
 Just like yesterday, Then I'll get on my knees and pray..."
            -- Pete Townshend/The Who, "Won't Get Fooled Again"

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