Networks

Ask something
Question Locked

nslookup

0 helpful
6 replies

by raju.reddy009

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.
Sir i am doing as IT-Asst. i tried nsllokup command to know system names in my network.but it is saying correct only server name and ip remaining systems it is saying wrong or last released ip address. i am using this command in client machine in user level only.but one thing there is no chance for DNS errors coz i checked in event viewr and some thing.what is the reason plsss.

6 replies

by tg2

system name resolution requires that the machines have registered their names with a DNS server/service.

If the machines are not registering themselves, and if there is no reverse ip dns set up, then you won't get the names.

Additionally, this is different from the WINS names that many machines may know from listening and caching WINS (netbios info).

So, first, check the DNS server, make sure its allowing updates, make sure it has forward and reverse zones, and check the machines, make sure they are set to update the server.

by raju.reddy009

Sir,
this is one site (Branch office) which is connected to main office and Our seniours configured the server like auto upgrade in DNS means when we add new system it will add automatically if we demote a old system from domain it will automatically delete from DNS entries.So no problem with dns.

So where the problem presist.

by tg2

Check the hosts file? lmhosts file?

c:\windows\system32\drivers\etc\
(or winnt for older than xp)

Other than the hosts file and any DNS servers that the machine is going to use, where else would this machine get its DNS response from?

The only other possibility is rogue DNS.

Spy/adware installed on the pc could redirect to external DNS servers

someone between your machine and the dns server in question could redirect dns queries (networking dept might want a local cache used, etc)

you could see if your network people can watch traffic from your machine's ip (via firewall & router) to see if its sending DNS requests outside and where too.. etc.

Its more likely that your local IT / Admins would be able to better follow the actions of the machine, rather than shots in the dark..

by raju.reddy009

Sir,

Pls give me your mail id to me then it is possible to send the printscrn see that. i have some doughts also sir.plsssss could you?

by tg2

click my "TG2" name next to the "by" ... it will take you to my profile.

upper right side is the option to "Send private message"

-T

This discussion is closed to new replies.