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тАО01-13-2012 10:19 AM
тАО01-13-2012 10:19 AM
DNS resolution issue
Hello Everyone,
I am setting up sendmail and I am having a problem with DNS resolving.
If I do a nslookup for like www.yahoo.com, it comes back with the error "Name Server 128.1.1.6 Not Found"
From the nslookup prompt if I issue the command "server 128.1.1.6" and then try to look up www.yahoo.com, it works just fine. am i missing something in my resolv.conf file?
Any help would be greatly appreciated!
Tim
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тАО01-13-2012 11:44 AM
тАО01-13-2012 11:44 AM
Re: DNS resolution issue
Can you please post your /etc/resolv.conf and /etc/nsswitch.conf files?
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тАО01-13-2012 01:32 PM
тАО01-13-2012 01:32 PM
Re: DNS resolution issue
# vi /etc/resolv.conf
"/etc/resolv.conf" 2 lines, 49 characters
domain thnajackson.com
nameserver 192.168.101.10
уАА
#
# vi /etc/nsswitch.conf
"/etc/nsswitch.conf" [Read only] 1 line, 105 characters
hosts: files [NOTFOUND=continue UNAVAIL=continue] dns [NOTFOUND=return UNAVAIL=c
ontinue TRYAGAIN=return]
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тАО01-13-2012 01:36 PM
тАО01-13-2012 01:36 PM
Re: DNS resolution issue
oops sent the information from the wrong server...
# vi /etc/resolv.conf
"/etc/resolv.conf" 2 lines, 49 characters
domain rc.ghbcoleman.com
nameserver 128.1.1.6
уАА
#
# vi /etc/nsswitch.conf
"/etc/nsswitch.conf" [Read only] 1 line, 105 characters
hosts: files [NOTFOUND=continue UNAVAIL=continue] dns [NOTFOUND=return UNAVAIL=c
ontinue TRYAGAIN=return]
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тАО01-13-2012 01:51 PM
тАО01-13-2012 01:51 PM
Re: DNS resolution issue
your resolv.conf file looks ok.
can you resolve your nameserver or other internal servers? Maybe a routing issue (check netstat -r)?
-Bob
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тАО01-15-2012 02:47 PM
тАО01-15-2012 02:47 PM
Re: DNS resolution issue
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тАО01-15-2012 05:20 PM - edited тАО01-15-2012 05:21 PM
тАО01-15-2012 05:20 PM - edited тАО01-15-2012 05:21 PM
Re: DNS resolution issue
>oops sent the information from the wrong server...
(You can delete your bogus post by using the post Options menu.)
Is the "wrong" server on the same network?
>If I do a nslookup for like www.yahoo.com, it comes back with the error "Name Server 128.1.1.6 Not Found"
It appears to not like that line in your /etc/resolv.conf.
>who might be able to divine what was in your "resolv.conf" file?
It was provided (twice :-). Note the "nameserver 128.1.1.6" entry and again from the error message.
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тАО01-16-2012 04:18 AM
тАО01-16-2012 04:18 AM
Re: DNS resolution issue
Hi ..
Simple thinks to check:
more /etc/resolving :
nameserver yy.yy.yy.yy
nameserver xx.xx.xx.xx
You should have two domain server for redundancy. Check the connectivity:
pin yy.yy.yy.yy
Check if you can resolv the names in your network.
If everything is ok.
This I guess it may by a firewall rule that stop the DNS request to out-side your network.
Regards.