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

Forum Discussion

johns's avatar
johns
Ret. Employee
Jul 11, 2006

Persistence using Source IP and PORT

I have a requirement where clients log into a terminal server farm and initiate https requests to VIP on BIG-IP, and need to persist users based on their source IP and PORT. Currently, it is not poss...
application delivery
dev
devops
irules
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Dec 27, 2015

Hi Joey,

since v10, I wouldn't recommend to use 

persist UIE "[IP::client_addr]:[TCP::remote_port]"
anymore.

Using a CARP based algorythm for this specific scenario would be far more elegant now, since CARP doesn't need to store a session table record for each single client_ip:port combination and doesn't have to remember any timeouts.

when CLIENT_ACCEPTED {
    persist carp "[IP::client_addr]:[TCP::remote_port]"
    pool xyz_pool
}

Cheers, Kai