ping: unknown host / can't resolve any DNS addresses

[Geekay]

Hi all,

I've got a SuSE box running on a network that can not connect out to any websites.

ping google.com
ping: unknown host google.com

ping 74.125.157.104
PING 74.125.157.104 (74.125.157.104) 56(84) bytes of data.

--- 74.125.157.104 ping statistics ---
73 packets transmitted, 0 received, 100% packet loss, time 72019ms

I'm using a static IP for this PC, but also have tried setting it to a dynamic with the same results. The PC is able to ping the router, but that's about as far as it goes.

It can also ping other Windows PC's on the network. Those PC's are also able to ping the SuSE PC. The SuSE PC will not ping out to the ISP's DNS server .. just times out.

Can't see it being an issue with my router, because the Windows PC's will resolve and connect out to the net fine. Kind of at a loss for this one, thanks for any suggestions in advance

[scathefire]

be sure you have a default gateway

route

check your DNS servers

cat /etc/resolv.conf
nslookup www.google.com
dig www.google.com

[Geekay]

Have confirmed my /etc/sysconfig/network/routes file has the correct default gateway.

Also /etc/resolv.conf has correct DNS servers.
cat /etc/resolv.conf
nameserver 192.168.15.10
nameserver 192.168.15.12
hostresorder local bind nis

nslookup google.com
;; connection timed out; no servers could be reached

dig google.com
;; global options: printcmd
;; connection timed out; no servers could be reached

I actually tried with [www] in front of google for both of the commands but can't reply with URL's because my post count is too low

[scathefire]

can you talk to other DNS servers?

nslookup www.google.com 4.2.2.2

[Geekay]

Also a negative.

nslookup google.com 4.2.2.2
;; connection timed out; no servers could be reached

[atreyu]

run the actual route command suggested, so we can see that you do in fact have a default gateway defined.

[Geekay]

SLED10SP2-gk:/home/g# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.187.117.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 0 0 0 eth0
loopback * 255.0.0.0 U 0 0 0 lo
default 10.187.117.2 0.0.0.0 UG 0 0 0 eth0

[atreyu]

So you do have a default route - I assume that ip address (10.187.117.2) is your router, yes?

Can you verify the ip addresses of your DNS servers? You can do that by other logging onto the router itself and looking up DNS info, or by going to another PC on the network that can connect to the internet:

if Windows:

ipconfig /all

if Linux:

cat /etc/resolv.conf

[Geekay]

Yup, verified that earlier.

Have confirmed my /etc/sysconfig/network/routes file has the correct default gateway.

Also /etc/resolv.conf has correct DNS servers.
cat /etc/resolv.conf
nameserver 192.168.15.10
nameserver 192.168.15.12
hostresorder local bind nis

[atreyu]

That's not what I meant by verifying - I should have said "independent verification", meaning, see if other PCs that can get online report using the same DNS info. but i'm sure you triple-checked that already, just grasping at straws...