Comments on: SQL SERVER – FIX ERROR – Cannot connect to . Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. (Microsoft SQL Server, Error: 18452)

By: MW

MW — Fri, 03 May 2013 08:50:55 +0000

Iwas having this problem when connected to VPN. I wanted to use a local copy of a network DB for development and permissions in the DB were domain controlled, so I needed the VPN connection. Adding the local host entries suggested resolved the issue.

127.0.0.1 localhost
127.0.0.1 mycomputername
127.0.0.1 mycomputername localhost

strangely I was only having this prioblem with SSMS 2012, 2008 worked fine?

By: Anonymous

Anonymous — Wed, 30 Jan 2013 16:09:08 +0000

The local host was already in the host file and adding the machine name to the host file did not help either. In my case I found out that VPN software was causing the issue. Since it was a local database and a local excel file I was uploading, I simply closed the VPN connection and it worked.

By: German Masis

German Masis — Fri, 11 Jan 2013 20:54:50 +0000

TThe error message, at least, suggest two things
i. A name resoultion trouble.
ii. lock out account. I had this issue with some
jobs and the problem was the account was lock out.

By: MapleMale

MapleMale — Wed, 09 Jan 2013 19:11:59 +0000

I figured this out…

I was connecting to another name specified in my hosts file as 127.0.0.1

The reason being, I work in a dev enviroment where our SQL Connection strings are all setup as something like my_dev_sqlbox. The entry looked like this:

127.0.0.1 localhost
127.0.0.1 my_dev_sqlbox

my_dev_sqlbox was giving me the error. However, if I enter it like this it works:

127.0.0.1 localhost
127.0.0.1 my_dev_sqlbox localhost

By: MapleMale

MapleMale — Wed, 09 Jan 2013 18:55:48 +0000

Same error here as well. Solution did not work.

By: Jija Dahifale

Jija Dahifale — Fri, 14 Sep 2012 18:09:21 +0000

Dear Sir, I followed your instructions but not resolved. I am getting same error which you have mensioned.
Example, I have 3 machines; windows7, and two machines of windows server 2003. I can connect SQL server from windows server2003 to another windows server 2003 machine and windows7 machine. But problem is I unable to connect SQL Server from windows 7 machine. what should I do??

By: Rohit

Rohit — Tue, 11 Sep 2012 00:22:49 +0000

Hi Pinal

I do not think doing an entry into hostfile is a solution. 127.0.0.1 is loopback IP, it must work without an host file entry. It is working for me on many server.

By: lil_kid

lil_kid — Tue, 11 Sep 2012 00:05:13 +0000

You can keep laughing but there is nothing wrong with using loopback IP (for localhost) in the host file.

By: Anonymous

Anonymous — Thu, 06 Sep 2012 15:18:25 +0000

I was laughing because you put in the loop back IP as your IP. Probably you should do a IPCONFIG and put in that IP as your IP.