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Port numbers 1433 and 1434

  • August 7, 2012 at 11:05 am

    #392908

    Hi DBA's

    why there are two ports 1433 and 1434 for SQL Server.

    whts the purpose of two?

    how are they different?

    I came to know 1433 is for TCP\IP

    1434 for UDP what does this mean ?

    Thanks in advance!

  • August 7, 2012 at 11:07 am

    #1522735

    Sqlism (8/7/2012)

    Hi DBA's

    why there are two ports 1433 and 1434 for SQL Server.

    whts the purpose of two?

    how are they different?

    I came to know 1433 is for TCP\IP

    1434 for UDP what does this mean ?

    Thanks in advance!

    The default instance of SQL Server listens on Port 1433. Port 1434 is used by the SQL Browser Service which allows connections to named instances of SQL Server that use dynamic ports with out having to know what port each named instance is using, especially since this can change between restarts of the named instance.

    Books Online should provide more details.

  • August 7, 2012 at 11:48 am

    #1522752

    Hi,

    When SQL Server 2000 and SQL Server 2005 clients request SQL Server resources on a named instance, the client network library sends a UDP message to the server using port 1434

    Please go through with the below URL for detail

    http://msdn.microsoft.com/en-us/library/ms175483(v=sql.90).aspx

    Thanks,

    Mohammed

  • August 7, 2012 at 11:50 am

    #1522756

    Mohammedr_mcts (8/7/2012)

    Hi,

    When SQL Server 2000 and SQL Server 2005 clients request SQL Server resources on a named instance, the client network library sends a UDP message to the server using port 1434

    Please go through with the below URL for detail

    http://msdn.microsoft.com/en-us/library/ms175483(v=sql.90).aspx

    Thanks,

    Mohammed

    Let's make it easier for others:

    http://msdn.microsoft.com/en-us/library/ms175483(v=sql.90).aspx

  • August 7, 2012 at 3:01 pm

    #1522856

    Sqlism (8/7/2012)

    Hi DBA's

    why there are two ports 1433 and 1434 for SQL Server.

    whts the purpose of two?

    how are they different?

    I came to know 1433 is for TCP\IP

    1434 for UDP what does this mean ?

    Thanks in advance!

    you don't have to use TCP\UDP 1434, you can just connect using IP,portnumber

    e.g.

    10.10.10.45, 1528

    -----------------------------------------------------------------------------------------------------------

    "Ya can't make an omelette without breaking just a few eggs" 😉

  • August 7, 2012 at 9:13 pm

    #1522939

    One more note. By default , DAC uses 1434 port.

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    #1640619

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