problem with FTP access on BIG IP V11.2.0 HF1

Hi dechir, i just found this topic. At this time I am working on a project for one of our customers and experience the same (almost) FTP problem. In my case the FTP communication flows from internal to the Internet (GTM link load balancing). In order to troubleshoot this problem I built a test environment using v.11.2.0 (NO HF1), this gives no problem. The problem starts with HF1.

 

 

I made some tcpdumps in internal as well as external interface and can clearly see that the BIG-IP is modifying the response of the server after the client sends a passive request.

 

 

This looks like some problem we had in the past with other releases.

 

 

Have you allready submitted a service request with F5 ?