Forum Discussion

Nimbostratus

Jan 05, 2021

Need help with insert true-client-ip to X-Forwarded-For rule on F5 LTM

Hi, Additional INFO: First of I will represent the access as it is done from the client to the F5 CLIENT --> Cloudflare --> F5 Service client try to access to the following hostname tha...

application delivery

iRules

Enes_Afsin_Al

MVP

Jan 05, 2021

Hi Prasad4u,

iRule:

when HTTP_REQUEST {
	if { [HTTP::header exist True-Client-IP] } {
		# Client --> CloudFlare --> F5
		HTTP::header replace X-Forwarded-For [HTTP::header True-Client-IP]
	}
	else {
		# Client --> F5
		HTTP::header replace X-Forwarded-For [IP::client_addr]
	}
}

Additional note: In this scenario, don't use source_addr persistence.