Server Drop Down List
Brian Donahue
Posts: 6,590 Bronze 1
Hello,
We get this list of servers from ODBC (some functions of the odbc32.dll). The way that this works is not fully documented as far as I can tell, but I do know that Microsoft SQL Servers respond to broadcast messages from ODBC clients that are trying to discover them.
There is also an option in the SQL Server configuration to hide the server from ODBC, so you may want to ask the DBA if they'd implemented that.
We get this list of servers from ODBC (some functions of the odbc32.dll). The way that this works is not fully documented as far as I can tell, but I do know that Microsoft SQL Servers respond to broadcast messages from ODBC clients that are trying to discover them.
There is also an option in the SQL Server configuration to hide the server from ODBC, so you may want to ask the DBA if they'd implemented that.
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Comments
Can I get back to you on this tomorrow? I'm checking with my colleagues about this.
SQL Server Instance names are transmitted on TCP port 1434. Is there a possibility that you've got a firewall blocking this port?
If Slammer spreads using SQL Server discovery, then it makes sense that sysadmins are blocking the port off at the firewall. I'm sure that viruses probably discover SQL Server instances the same way that we do!