Force HTTP communication

You can "hide" the SSL::disable command from the iRule parser and only use the command when the VIP port (TCP::local_port) is HTTPS and the pool is not for HTTPS:

when LB_SELECTED {

    Check if the VIP port is for SSL
    This could be a single port like 443 or multiple ports
   switch [TCP::local_port] {
      443 {
          Check if server port is not SSL
 if {!([LB::server port] == 443)}{
            set ssl_disable_cmd "SSL::disable serverside"
            eval $ssl_disable_cmd
         }
      }
   }
}

If the exact logic isn't correct for your scenario and you want help adjusting the example, please reply with more info on when you want to disable SSL on the serverside connection.

Thanks, Aaron