F5 - Closing And Opening Ports Solution
I have F5 with 4 web servers sitting in front of it and 6 retrieval servers sitting behind it. (Web <--> f5 <--> retrieval server) When web traffic from a WEB-A (web server A) connects to F5, F5 connects to a specific port on RET-A (retrieval server A) to login and gets a license from retrieval server. We have a windows service app that monitors licenses left and if none are left it closes the login port on RET-A so F5 cannot access it. When F5 comes in the next time it finds out that RET-A login port is closed so it redirects traffic to RET-B and so forth. Now, when licenses are available again in RET-A, I want F5 to be aware and put RET-A back into queue of available servers. My question is: how can I alert F5 that RET-A is now available and can service more requests?