I can ping the google.com ip addresses (209.85.231.104) but can't ping the FQDN, obviously DNS is broken.
I can also ping the nameserver ip addresses specified in /etc/resolv.conf.
Greetings,
On Mon, Mar 8, 2010 at 11:04 AM, Gaurav Nangla gaurav.knangla@gmail.com wrote:
I can ping the google.com ip addresses (209.85.231.104) but can't ping the FQDN, obviously DNS is broken.
I can also ping the nameserver ip addresses specified in /etc/resolv.conf.
Just a thought: why don't you try google nameserver 8.8.8.8 in resolv.conf as the only server.
Regards,
Rajagopal
Gaurav Nangla wrote:
I can ping the google.com http://google.com ip addresses (209.85.231.104) but can't ping the FQDN, obviously DNS is broken.
I can also ping the nameserver ip addresses specified in /etc/resolv.conf.
well, the DNS servers given by your resolv.conf output seem valid from here.. I recommend doing some more debugging with `host` or similar DNS diagnostic tools.
note regular DNS lookups like these tend to use UDP rather than TCP, if you're behind a NAT firewall which doesn't allow outbound udp port 53 and connection track the response, then things might not work well.
$ host google.com 208.67.220.220 Using domain server: Name: 208.67.220.220 Address: 208.67.220.220#53 Aliases:
google.com has address 74.125.19.105 google.com has address 74.125.19.99 google.com has address 74.125.19.103 google.com has address 74.125.19.106 google.com has address 74.125.19.147 google.com has address 74.125.19.104 google.com mail is handled by 400 google.com.s9b2.psmtp.com. google.com mail is handled by 200 google.com.s9a2.psmtp.com. google.com mail is handled by 300 google.com.s9b1.psmtp.com. google.com mail is handled by 100 google.com.s9a1.psmtp.com.
$ host google.com 208.67.222.222 Using domain server: Name: 208.67.222.222 Address: 208.67.222.222#53 Aliases:
google.com has address 74.125.19.105 google.com has address 74.125.19.147 google.com has address 74.125.19.99 google.com has address 74.125.19.103 google.com has address 74.125.19.104 google.com has address 74.125.19.106 google.com mail is handled by 400 google.com.s9b2.psmtp.com. google.com mail is handled by 200 google.com.s9a2.psmtp.com. google.com mail is handled by 300 google.com.s9b1.psmtp.com. google.com mail is handled by 100 google.com.s9a1.psmtp.com.
John R Pierce wrote:
Gaurav Nangla wrote:
I can ping the google.com http://google.com ip addresses (209.85.231.104) but can't ping the FQDN, obviously DNS is broken.
I can also ping the nameserver ip addresses specified in /etc/resolv.conf.
well, the DNS servers given by your resolv.conf output seem valid from here.. I recommend doing some more debugging with `host` or similar DNS diagnostic tools.
note regular DNS lookups like these tend to use UDP rather than TCP, if you're behind a NAT firewall which doesn't allow outbound udp port 53 and connection track the response, then things might not work well.
$ host google.com 208.67.220.220 Using domain server: Name: 208.67.220.220 Address: 208.67.220.220#53 Aliases:
google.com has address 74.125.19.105 google.com has address 74.125.19.99 google.com has address 74.125.19.103 google.com has address 74.125.19.106 google.com has address 74.125.19.147 google.com has address 74.125.19.104 google.com mail is handled by 400 google.com.s9b2.psmtp.com. google.com mail is handled by 200 google.com.s9a2.psmtp.com. google.com mail is handled by 300 google.com.s9b1.psmtp.com. google.com mail is handled by 100 google.com.s9a1.psmtp.com.
$ host google.com 208.67.222.222 Using domain server: Name: 208.67.222.222 Address: 208.67.222.222#53 Aliases:
google.com has address 74.125.19.105 google.com has address 74.125.19.147 google.com has address 74.125.19.99 google.com has address 74.125.19.103 google.com has address 74.125.19.104 google.com has address 74.125.19.106 google.com mail is handled by 400 google.com.s9b2.psmtp.com. google.com mail is handled by 200 google.com.s9a2.psmtp.com. google.com mail is handled by 300 google.com.s9b1.psmtp.com. google.com mail is handled by 100 google.com.s9a1.psmtp.com. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
please try: dig www.google.com @IPofyourDNSserver and send me the output
I tried everything you put forward, but didn't work.
I had openSUSE 11.1 installed in a VM as well, DNS worked fine with it.
Best Regards, Gaurav
On Mon, Mar 8, 2010 at 11:19 AM, John R Pierce pierce@hogranch.com wrote:
Gaurav Nangla wrote:
I can ping the google.com http://google.com ip addresses (209.85.231.104) but can't ping the FQDN, obviously DNS is broken.
I can also ping the nameserver ip addresses specified in
/etc/resolv.conf.
well, the DNS servers given by your resolv.conf output seem valid from here.. I recommend doing some more debugging with `host` or similar DNS diagnostic tools.
note regular DNS lookups like these tend to use UDP rather than TCP, if you're behind a NAT firewall which doesn't allow outbound udp port 53 and connection track the response, then things might not work well.
$ host google.com 208.67.220.220 Using domain server: Name: 208.67.220.220 Address: 208.67.220.220#53 Aliases:
google.com has address 74.125.19.105 google.com has address 74.125.19.99 google.com has address 74.125.19.103 google.com has address 74.125.19.106 google.com has address 74.125.19.147 google.com has address 74.125.19.104 google.com mail is handled by 400 google.com.s9b2.psmtp.com. google.com mail is handled by 200 google.com.s9a2.psmtp.com. google.com mail is handled by 300 google.com.s9b1.psmtp.com. google.com mail is handled by 100 google.com.s9a1.psmtp.com.
$ host google.com 208.67.222.222 Using domain server: Name: 208.67.222.222 Address: 208.67.222.222#53 Aliases:
google.com has address 74.125.19.105 google.com has address 74.125.19.147 google.com has address 74.125.19.99 google.com has address 74.125.19.103 google.com has address 74.125.19.104 google.com has address 74.125.19.106 google.com mail is handled by 400 google.com.s9b2.psmtp.com. google.com mail is handled by 200 google.com.s9a2.psmtp.com. google.com mail is handled by 300 google.com.s9b1.psmtp.com. google.com mail is handled by 100 google.com.s9a1.psmtp.com. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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Gaurav Nangla -
John R Pierce -
Pitshou Asingalembi -
Rajagopal Swaminathan