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 Post subject: Computer Name Resolution issues this semester
PostPosted: Tue 08-25-2009 11:48PM 
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Joined: Fri 09-14-2007 3:47PM
Posts: 437
Location: Just behind your left shoulder

Source: Sigma Pi
Does anyone know what the deal is with all of the file sharing and/or name resolution and/or (???) problems?

For example, I used to be able to ping computer names and it would both resolve the name to an IP and allow me to connect to their Windows file shares.

This semester, it seems like the only luck I'm having connecting to shares that aren't on my subnet is to somehow obtain the full .device.mst.edu hostname, ping it, grab the IP, and access it via \\131.151.xxx.xxx. If I try doing \\rXXjoeminer.mst.edu, I get some weird "duplicate name exists on the network - change your computer name!" type message (and no, there isn't a duplicate name issue).

So... what gives? Anyone got friends in the IT department that could shed some light on wtf happened?


Last edited by blitzvergnugen on Wed 08-26-2009 10:18AM, edited 1 time in total.

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 Post subject: Re: Computer Name Resolution issues this semester
PostPosted: Wed 08-26-2009 6:44PM 
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Usually nbt query packets don't carry beyond your local subnet. The way windows deals with this is to query a WINS server. Check the output of your "ipconfig /all" to see if dhcp assigned you a WINS server to query. If it does come up, then there might be an issue with their WINS server. I don't live on campus anymore, so this doesn't really effect me, but that is a good place to start looking.

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 Post subject: Re: Computer Name Resolution issues this semester
PostPosted: Wed 08-26-2009 8:01PM 
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Joined: Fri 09-14-2007 3:47PM
Posts: 437
Location: Just behind your left shoulder

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heretic wrote:
Usually nbt query packets don't carry beyond your local subnet. The way windows deals with this is to query a WINS server. Check the output of your "ipconfig /all" to see if dhcp assigned you a WINS server to query. If it does come up, then there might be an issue with their WINS server. I don't live on campus anymore, so this doesn't really effect me, but that is a good place to start looking.


Good call:

Code:
NBLookup Interactive Mode

Type 'help' for a list of commands

Default Server: 131.151.247.43

Current option values:
   timeout=2 seconds
   retry=0 retries
   suffix=20
   recursion is on (recurse)
> cylord1
Recursion is on

Querying WINS Server: 131.151.247.43
NetBIOS Name: cylord1
Suffix: 20

NetBIOS name query request timed out
    timeout was 2 seconds
*** Request to [131.151.247.43] timed-out

>
So, WINS servers (yes, I tried .44 -the backup) failed and/or administratively down?

EDIT: It's gotta be a firewall/router ACL or something, because the WINS servers are accessible from a campus computer (CLC):

Code:
NBLookup Interactive Mode

Type 'help' for a list of commands

Default Server: 131.151.247.43

Current option values:
   timeout=2 seconds
   retry=0 retries
   suffix=20
   recursion is on (recurse)
> cylord2009
Recursion is on

Querying WINS Server: 131.151.247.43
NetBIOS Name: cylord2009
Suffix: 20

Name returned: CYLORD2009
The name requested does not exist.

> bleeding-edge
Recursion is on

Querying WINS Server: 131.151.247.43
NetBIOS Name: other_known_computer_name
Suffix: 20

Name returned: OTHER_KNOWN_COMPUTER_NAME
The name requested does not exist.


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