Problem with DNS resolution

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Level 1

0 points

Problem with DNS resolution

Hi All,

I am facing a strange problem with the name resolution in mac os x. I have a Lan with a cisco switch and a cisco router that serves as DHCP and DNS server.

In the router I have setup some static host names with the relevant IPs in the local Lan. When ever I try to ping or browse, from within OS X, using the names, I get "unknown host" error. The problem is only with the static hosts I have setup. The strange part is that nslookup and dig give back the correct IP as it is assigned in the Cisco router. When I use my iPhone or iPad everything works fine.

Any help would be appreciated.

MacBook Pro, Mac OS X (10.6.8)

Posted on Jul 14, 2011 3:44 PM

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Answer 1

RoryMac

Level 3

814 points

Jul 14, 2011 4:44 PM in response to barsam

How is your DNS Server set up on the Mac? Manually or does it pull a DNS server when it connects to the dhcp server?

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Answer 2

barsam Author

Level 1

0 points

Jul 15, 2011 1:35 AM in response to RoryMac

It is setup through the DHCP automatically.

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Answer 3

barsam Author

Level 1

0 points

Jul 15, 2011 2:58 AM in response to barsam

Another strange discovery...

If I add a dot (.) at the end of the name, the ip is resolved correctly 😕

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Answer 4

Prr0

Level 1

9 points

Aug 16, 2011 2:02 PM in response to barsam

Hi Barsam, did you solve this issue?

I have something similar happening to me, I can ping, traceroute, nslookup even use entourage to send and receive emails, but can browse the web with any browser (safari, firefox and chrome)

Last night farefox was working, today I upgrade to the latest firefox version and now firefox stop working saying that can resolve the name, the same error as safari and chrome

I flush the cache, reboot, manually enter DNS, change DNS servers to public ones, but still can't surf the web

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Answer 5

Prr0

Level 1

9 points

Aug 24, 2011 8:57 AM in response to Prr0

Hi Guys,

This is the final update for this issue, because rely on the AP, don't know why, but the error appear when the macbook connect to certain model of AP.

So I will assume that there some kind of incompatibility between OS X Lion and some AP

Thanks to all that send notes

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Answer 6

Prr0

Level 1

9 points

Oct 21, 2011 8:27 AM in response to barsam

Hi,

With the help of Dr Venture and CSound1 we determine that there's some issue surfing the web went you have a non linksys router and the IP address is not 192.168.xxx.xxx

If you experience surfing problems check the IP your are using, for me should be in the 192.168 net to allow my Macbook to surf the web

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