Revision 7.10
2/28/2012
(i) Cable plugged in?
(ii) You have right IP number?
(iii) Is the network configuration on your computer correct?
(iv) Consult your Network Administrator or Network Guru
12.8.4.2 Confirm DNS Configuration
Determine your NameServer:
[you@client ~]$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search yourdomain.com
nameserver 10.20.31.2
Network Connectivity to NameServer?
[you@client ~]$ ping -c 3 10.20.31.2
PING 10.20.31.2 (10.20.31.2) 56(84) bytes of data.
64 bytes from 10.20.31.2: icmp_seq=1 ttl=64 time=0.949 ms
64 bytes from 10.20.31.2: icmp_seq=2 ttl=64 time=0.600 ms
64 bytes from 10.20.31.2: icmp_seq=3 ttl=64 time=1.00 ms
--- 10.20.31.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.600/0.850/1.001/0.178 ms
If you can't ping the NameServer: consult Network Administrator.
NameServer configured properly?
host dockserver.yourdomain.com
dockserver.yourdomain.com has address 10.20.30.40
;; connection timed out; no servers could be reached
(i) You have right IP number for NameServer?
(ii) DNS running on the NameServer computer?
(iii) Some firewall blocking DNS service on port 53?
Host dockserver.yourdomain.com not found: 3(NXDOMAIN)
The NameServer not properly configured. Consult Network Administrator.
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