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Forum Discussion

ioii's avatar
ioii
Icon for Nimbostratus rankNimbostratus
May 18, 2023

How to transparently transmit the IP of the F5 device itself?

The topology map is client-->F5-->backend nginx service Now the nginx service log only has the customer’s real ip, I want the F5’s ip to be recorded in the log, what should I do?
application delivery
devops
JRahm's avatar
JRahm
Icon for Admin rankAdmin
May 19, 2023

As mentioned by Paulius , you could insert a header in an iRule like this:

when HTTP_REQUEST_RELEASE {
  HTTP::header insert X-F5-SOURCE [IP::local_addr]
}

and in your log format on the nginx side, something like:

[f5-ip=$upstream_http_x_f5_source]