SQLver

Determines the version of MS SQL Server without the need to log into the servers by querying the file, snetlib.dll . SQLVer has been built to utilise the same techniques as SQLPing.NET 1.3 beta, however, does not actually use a UDP packet sent to port 1434 packet to enumerate the MS SQL server version info. This tool in fact uses TCP port 1433 instead.

SQLver is available from here.

Execution:

sqlver <ip_address/hostname> <port_no.>