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SQL server behind cisco router, what ports needs to be open?

Posted on 2010-11-30
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Last Modified: 2012-05-10
I have Microsoft SQL Express server (IP 10.10.12.51) behind CISCO router and I have no idea why port 1433 or 1434 is not open for outside connections. Here you have a part of the Router cisco 1841 Ver 12.4(13r)  config:

 permit tcp any host xx.xx.xx.xx established
 permit tcp any host xx.xx.xx.xx eq 80 log
 permit tcp any host xx.xx.xx.xx eq 1433 log
 permit tcp any host xx.xx.xx.xx eq 1434 log

where xx.xx.xx.xx is my External IP , strange part is to test it i remove all 3 lines and can't access to my web server, but if put the line " permit tcp any host xx.xx.xx.xx eq 80 log" it worked my web server.(with that test i know that i'm in the correct direction.
is there any other port that needs to be open? or any other line for the cisco router

i tried "telnet xx.xx.xx.xx 1433  getting the "could not open connection to the host, on port 1433: connect failed"

my server is a windows 2003 web server , firewall is off.
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Question by:juanchisv
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SIM50 earned 500 total points
ID: 34240232
I think MS SQL Express is a named instance by the default. Named instances have dynamic port assignments. Only default instances in MS SQL assigned port 1433. You need to manually assign a static port in SQL server configuration or the next time you will restart the server, it will get a new port number and it will be blocked again.
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by:juanchisv
ID: 34258427
thank you.
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