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I'm using psexec and I cannot execute a simple cmd into a machine. The same response it's always the same "incorrect username or incorrect password" (also returning error code 6). This is the command I use:

"c:\program files\psexec\psexec.exe" \\softtestsXP.test.int -u testUser -p xxxxxxx ipconfig

The user exists and I'm able to use this user to remote access. But the strangest part comes here. If I execute the same command line, but changing the machine name by its IP, then the psexec works fine. I checked if softtestsXP.test.int resolves correctly and it works.

EDIT: Forgot to say that both machines are virtual machines into the same hypervisor (ESXI)

Any help is welcome

EDIT: Well, finally resolved by writing an script that makes ping and with the information, it takes the IP. With this IP, I execute psexec correctly. My fear was that if machine changes their IP, an IP hardcoded would be a bad idea, so the script solves my problem.

Thanks to all.

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    What versions of Windows on each end (client and server)? Also, is softtestsXP.test.int the actual HOST (A) record in dns or is it a a CNAME (alias)?
    – squillman
    May 31, 2011 at 14:25
  • The client is a win server 2008 (where psexec is executed) and the server (softtestXP) is a win32 XP SP3. AFAIK, the softtestXP is a HOST, but I'm not completely sure.
    – Killrazor
    May 31, 2011 at 14:33

4 Answers 4

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Do you already have a connection to the server in question open that is using a different username? This could be a mapped drive or any other connection (services.msc, etc.). Running "net use" would most likely show this.

This might be an old Windows issue, that doesn't allow you to connect to a given server with more than one username at a time. The work-around is what you already discovered - to use the IP address.

If you have other connections open, try to disconnect them and see if it works then. If you can't disconnect them then I would just keep using the IP address.

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I would try using the netbios name and the format -u domain\user

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  • The netbios user returns the same "6" errorcode.
    – Killrazor
    May 31, 2011 at 14:39
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Have you checked your hosts file (%windir%\system32\drivers\etc\hosts) on the client machine ? Depending on how you "checked if softtestsXP.test.int resolves correctly" it may or may not fool you (i.e nslookup resolves fine but ping/psexec points to hardcoded ip)

Also the Windows 2008 might be trying to use IPv6 instead of IPv4 to connect to the XP node when you use host name.

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Perhaps you have a stale DNS record. Even if nslookup returns the correct IP address, it will not update the DNS cache.

To purge the DNS cache, run ipconfig /flushdns.

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