Rewriting the host and port in the request and response to the server

Hey guys.
I'm trying to perform the host and port rewrite but it still doesn't work. 

BIG-IP 16.1.2.2 Build 0.0.28 Point Release 2

The scenario is:
Two pairs of App1 and App2 servers. App1 Service Provider and App2 Identity Provider.
Outside users must access via IP. The internal network users by name.
The application does not allow the exchange to configure access by IP and FQDN at the same time.
When accessing App1, the user is redirected to App2, after authentication and redirected to App1.
In summary, I would like that in all communication between the user and the servers the FQDN:PORTA is replaced by IP:PORTA.

I'm using iRules for this, but without success. I create one rule per block.

PAM_REQUEST_FQDN_to_IP
when HTTP_REQUEST {
if { [HTTP::uri] starts_with "app1.dnf.local:443" } {
set uri [string map -nocase {"app1.dnf.local:8282" "10.20.110.6"} [HTTP::uri]]
HTTP::uri $uri
}
}

MFA_REQUEST_FQDN_to_IP
when HTTP_REQUEST {
if { [HTTP::uri] starts_with "app2.dnf.local:443" } {
set uri [string map -nocase {"app2.dnf.local:9251" "10.20.110.7"} [HTTP::uri]]
HTTP::uri $uri
}
}

PAM_RESPONSE_FQDN_to_IP
when HTTP_RESPONSE {
if { [HTTP::uri] starts_with "app1.dnf.local:443" } {
set uri [string map -nocase {"app1.dnf.local:8282" "10.20.110.6"} [HTTP::uri]]
HTTP::uri $uri
}
}

MFA_RESPONSE_FQDN_to_IP
when HTTP_RESPONSE {
if { [HTTP::uri] starts_with "app2.dnf.local:443" } {
set uri [string map -nocase {"app2.dnf.local:9251" "10.20.110.7"} [HTTP::uri]]
HTTP::uri $uri
}
}

Thanks a lot for the help