Server 2012 Linked Server From An Instance

Question

I have 3 SQL Server 2012 Instances, 2 on SiteA on the same server SiteAServer. I have 1 on SiteB on server SiteBServer.

SiteADefaultInstance, SiteASecondInstance

SiteBDefaultInstance

• SiteBDefaultInstance can create a linked server to SiteADefaultInstance and SiteASecondInstance.
• SiteADefaultInstance can create a linked server to SiteBDefaultInstance.
• SiteASecondInstance CANNOT create a linked server to SiteBDefaultInstance.

I get the error

"Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON"

I am setting the security to be made using the current context.

I have ran setSPN for SiteAServer and SiteBServer. You don't have to change the commands if you have more than one instance do you? I am in the role sysadmin.

I have never experienced where it only worked one way before. Any suggestions where to look?

Answer 1

Comments were very useful in leading to the solution. After running SQL Server Kerberos Configuration Manager I saw that while the first was on 1433 for SiteADefaultInstance and the second instance of the database was listening on a dynamic port for SiteASecondInstance.

Went into SQL Server Configuration Manager > SQL Server Network Configuration > Protocols for SiteASecondInstance > TCP/IP and change IPALL TcpPort to a different port, say 9999.

SetSPN -s "MSSQLSvc/SiteAServer:9999" "user"

After this could create a linked server.