Forum Discussion

cymru81's avatar
cymru81
Icon for Altocumulus rankAltocumulus
Dec 17, 2019

XFF

We have enabled the option to include XFF ip in the header for a VS. We generate alerts from a pool member of one of the VS' that aid debugging etc. When the XFF address comes through, its in this ...
devops
LTM
xff
ohmyguard's avatar
ohmyguard
Icon for Nimbostratus rankNimbostratus
May 20, 2021

 Did you find a solution to this problem? Do you know if M@rk and aaperson:s solutions did work?

 

I have the same issue and I did notice that the XFF-header only comes out as "HTTP_X______________ = xxxxxxxxxxx, xxxxxxxxxxx" when set by the F5. If I manually send a request containing XFF-request header to the server (that does not go via the loadbalancer) the header key/value turns out just fine.

 

To me it seems like this behavior is due to some settings in F5 and not IIS. Unfortunately I do not know whats causing this yet.