Can't retrieve any external URLs from Fedora 12 host

judgedeath2 · 12-06-2009, 11:28 PM

I have probably the strangest problem I've ever seen in my years with linux. An offsite host running Fedora 12 can't download anything, at all. Not using wget, curl, nothing. Yum is broken (since it can't download anything from the repo's), and I only have ssh access to it, and do everything remotely, so obviously the network interface is working right.

I've rebooted it remotely twice to no avail.

Code:

[root@ks358 ~]# nslookup google.com
Server:         127.0.0.1
Address:        127.0.0.1#53

Non-authoritative answer:
Name:   google.com
Address: 74.125.53.100
Name:   google.com
Address: 74.125.67.100
Name:   google.com
Address: 74.125.45.100

[root@ks358 ~]# ping google.com
ping: unknown host google.com

[root@ks358 ~]# ping  74.125.67.100
PING 74.125.67.100 (74.125.67.100) 56(84) bytes of data.
64 bytes from 74.125.67.100: icmp_seq=1 ttl=55 time=94.7 ms
64 bytes from 74.125.67.100: icmp_seq=2 ttl=55 time=94.7 ms
64 bytes from 74.125.67.100: icmp_seq=3 ttl=55 time=94.8 ms
64 bytes from 74.125.67.100: icmp_seq=4 ttl=55 time=94.6 ms
64 bytes from 74.125.67.100: icmp_seq=5 ttl=55 time=94.7 ms
64 bytes from 74.125.67.100: icmp_seq=6 ttl=55 time=94.7 ms
64 bytes from 74.125.67.100: icmp_seq=7 ttl=55 time=94.9 ms
^C
--- 74.125.67.100 ping statistics ---
8 packets transmitted, 7 received, 12% packet loss, time 7098ms
rtt min/avg/max/mdev = 94.652/94.777/94.904/0.375 ms

[root@ks358 ~]# wget google.com
--2009-12-07 06:17:28--  http://google.com/
Resolving google.com... failed: Temporary failure in name resolution.
wget: unable to resolve host address "google.com"

I can't figure this one out for the life of me, any assistance is greatly appreciated!

paulsm4 · 12-07-2009, 12:19 AM

Hi -

Your DNS name resolution is broken. Networking is fine ... your "nslookup" is apparently able to perform a DNS lookup (74.125.45.100 is indeed a correct address for google.com) ... but your DNS client lookup configuration (/etc/resolv.conf etc) is apparently having problems.

Troubleshoot your DNS client configuration. I'd start with "/etc/resolv.conf" (or whatever equivalent your Fedora 12 might use), end with connectivity to the DNS server(s) you've listed in resolv.conf (who knows - your ISP's DNS server might be going on and off line on you!), and carefully check everything in between.

Good luck .. PSM

judgedeath2 · 12-07-2009, 09:09 AM

thanks paulsm4!

turns out when I upgraded it installed NetworkManager, which blew everything out of my resolv.conf.

added those new spiffy google public dns servs and everything's back to normal

milindlokde · 01-19-2010, 02:24 PM

i am facing same problem in fedora12. i get connected to internet using wvdial but unable to access internet using any browser. kindly tell me the configuration as the file /etc/resolv.conf is empty. i have disabled the firewall.

milindlokde · 01-19-2010, 02:28 PM

also am getting a lot of 'asterisks' in traceroute result though i have disabled firewall.