We have confirmed the same from the development team that there is no such setting for the max. no of connections allowed to the ports. Moreover from our analysis point of view the no. 300 may not be hard coded because everytime the no. of established connection varies before the ports get into hanged status, but everytime it is > 300.

Few quick questions for better understanding of the issue:-

1.Is there any other workaround available to analyze from OS point of view before throwing the ball to the application developers court?

2.Please let me know what may be the possible reason or the scenarios where ports remain in ESTABLISHED status.

3. Is there any system timeout variable/parameter from AIX point of view where we can mention the time after which the established connection will get automatically closed.

4. Does established connection for a long time mean an IDLE conection?

5. Is there any possibility that due to some never ending processes these connections are getting created with time?

Being very much new to the platform, asked you all the above questions for better understanding of the issue. Thanks in advance.