dns 2011 sbs

Sid_F used Ask the Experts™
I have an issue with dns, basically I connect a win7 client up to a wireless network on a different range than the sbs server, the firewall is set to pass all between the two subnets both ways. I set my clients primary dns as the ip of the server. I can rdp to the server fine from the client, I can also smb by ip but I cannot resolve any hostnames on the sbs domain.

Do I need to change something on the sbs 2011 server for this ? is there some security in place to not resolve dns names if the client is on a different subnet?
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Is your Win7 joined to the domain?

You may need to add the domain suffix to the DNS setting in your Windows 7.

In TCP/IP properties, DNS tab, Append these suffixes box.


no my machine is not part of the domain


ah excellent the suffix did the trick thanks, is this because I am not a member of the domain or because I am on a different subnet?
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I'm not 100% sure on that.

Joining a domain will usually cause the DNS on the PC to have the option to append primary connection suffix.... (above the append suffix area), so I always guessed this would search the PC domain (when it is in a domain).

you could assign a domain suffix through DHCP scope option which may help this issue.

If you just ping by name such as Netbios Name COMPUTER then that will generally be a Broadcast type of search.  A broadcast will not get routed to another subnet.

with the DNS suffix it will be a FQDN lookup and use the DNS server.

Then Node Type on the TCP/IP settings has an affect on how name resolution functions.  Such as first try WINS/NETBIOS, BroadCast and DNS last.  

IPCONFIG /all will show the NODE TYPE.  The Node Type can also be assigned via DHCP Scope option.

Without the suffix though, it wouldn't be able to 'assemble' an FQDN.  That's my guess.

Chris DentPowerShell Developer
Top Expert 2010

If it's not a member of the domain it won't automatically get the Primary DNS Suffix. Adding one manually will do as you say, allow it to assemble an FQDN.




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