Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

heybey_329083's avatar
heybey_329083
Icon for Nimbostratus rankNimbostratus
Aug 01, 2017

Application returning Error with possible port communication issue

Hello All,   The application requires port 3033 to communicate from the Application Server to the Control Server. Access to the Control Server is load balanced. There are two Control Servers & a ...
application delivery
big-ip
LTM
security
heybey_329083's avatar
heybey_329083
Icon for Nimbostratus rankNimbostratus
Aug 01, 2017

Yes it does have login to use the application, additional information: the login works well without issues and proceeds then produces the error.

 

The Control Servers are clustered but not sharing login information.

 

Here's the error info: from source application (hosted from app server) to destination control server

 

Reason: connect timed out Remote Host: 100.170.27.43 Remote Port: 3033 vmcid: 0x49421000 minor code: 80 completed: No

 

It seemed like the VIP URL can passthrough the port but unable to truely communicate with the remote host.