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SMB stopped working on windows 2003 server. Macs and scanners using SMB fail to connect

Posted on 2007-08-06
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Last Modified: 2013-12-27
Hello all, I am completely stumped on this one.

I have a domain that is running two windows 2003 SP 2 servers and both servers are domain controllers.
Server1 is the primary windows 2003 small business server and server 2 is windows 2003 enterprise and is used as a file server and a BES server. Server2 has File Server for Macintosh installed and started.

I setup Mac users with a shared folder 2 months ago and it has worked fine until Friday Afternoon at 1:45 PM. The Mac users connect by smb://servername/sharename, they enter their user info domain name  username = domainname/user, and password.

all of a sudden on Friday no users could connect to the server via SMB. This includes Mac's and scanners that connect with SMB.

I went through all the documentation for connecting macs to a share, I have disabled "digitally signed communication" on all the servers.

I can still connect to the server shares with a PC. I can  ping the server from the Macs, I can resolve the server name from the Macs, I also enabled audits on the folders to pickup errors.

on the server I get an error 529 unknown username or bad password.

Hope someone else has seen this same issue

Thanks so much

Peter
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Question by:pjinlaok
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KCTS earned 1500 total points
ID: 19641528
Check that in the Domain Controller Security Policy (as opposed to the Domain security policy), you have disabled "Digitally sign client communication (always)"
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by:pjinlaok
ID: 19642093
Hi KCTS,

Thanks for replying to my question. Yes I have already create a Linked GPO called SMB signing disabled. I made this change about 4 hours ago and then ran gpupdate.exe /flush.  

I have found a work around, but I have no idea why this would have changed in the middle of the day on Friday.

I use the Konica BIZHUB printer/scanner/copier and in the scanner configuration you can setup scanned images to send to a shared folder on the network over SMB. Before I would have to use the username domainname\username and now it will only accept just username.

This also changed on the Macs. I used to have to put the domain name before the username.

I still can't figure out why this would have changed in the middle of the day and I am wondering if it will randomly change back.

What do you think could have caused this?

Thanks

Peter
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