Newbie to rules

This is probably because you are testing from a single client and BIG-IP is load balancing once on your first request and creating a single connection over which it passes all subsequent requests.

 

To fix this problem, add:

 

class udp_packet_lb_ports {

 

53

 

}

 

to your bigip.conf.

 

 

This forces BIG-IP to load balance on every packet to port 53 which will execute your rule and create a new connection for every request.