AltocumulusWell, the X-Forwarded-For setting is supposed to work out of the box. I've tested myself in my lab here and it works. You should post the output of your HTTP profile configuration:
tmsh list ltm profile http
As well as the configuration of the virtual server you attached it to
tmsh list ltm virtual
And lastly take a sample packet capture on tmm (0.0) interface using a sample client of your choice:
tcpdump -i 0.0:nnnp -s0 -w /shared/tmp/xforwarded-test-v1.pcap -v
Community members might try to help you here but if it gets too complicated I'd advise you to open a case with F5 support as they can request a snapshop of your configuration (called qkview) and have a more thorough view of your system.
Regards, Rodrigo
