sql server port security

we have two instances of sql server 2005. Recently we have blocked the ports over the network and kept 1433 open for the sql server. but sometimes it is observed that SQL server is not connecting. What could be the reason for this? Specially incase when we are trying to connect through crystal reports.
salmanfazalAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Chris MConsulting - Technology ServicesCommented:
Sometimes SQL server 2005 is setup with dynamic port configuration, meaning that port 1433 might not be assigned to the service when it's restarted.

Investigate which port SQL server is running on when your applications fail to connect.

Secondly, there could be something that blocks you from connecting to port 1433. So do a virus scan on your client machines.

I have seen some people who fail to connect to SQL after virus attacks before.
The options are many but the best time to diagnose this is when the issue arises again.

Also check your logs (history) to see if there are any messages which coudl help you trouble shoot this faster. Just bear in mind that the causes can be many.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
salmanfazalAuthor Commented:
thnx
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server 2005

From novice to tech pro — start learning today.