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Port 1433
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TCP Port 1433

Common Use

Microsoft SQL Server port used typically for remote connections to the database.

Inbound Scan

Inbound scans are typically looking for Microsoft SQL Server installations with weak password protection and if successful are looking to steal or corrupt data or use some features with SQL Server to compromise the host system.  There are some worms which scan this port but mostly tools.

Outbound Scan

Outbound scans if occurring in volume should be considered an indication of a possible worm infection on the source computer and should be investigated.

Additional Information

Beware Attacks on TCP Port 1433

PortPeeker Capture of SQL Server Connection Attempt

Exploitation of Vulnerabilities in Microsoft SQL Server

Page last updated on February 09, 2004