subnet access to a proxy

What were the unexpected results / behavior that you are trying to work around?

I'm guessing Port Translation?

I think that your problem is that your trying to specify a connection to the server using [TCP::server_port]. Your trying to retrieve the port number to a node that you haven't established a connection with yet.

[TCP::server_port] = The serverside part of the LTM<->server connection.

I think that you should try changing it to use [TCP::client_port]. This would take the incoming connection port from the user (80, 443, etc) and send the traffic to the destination IP Address using that port.

[TCP::client_port] = The clientside part of the client<->LTM connection.

Another shortcut to that is to specify Port 0, which is the LTM's default 1 to 1 mapping for ports.

 
when CLIENT_ACCEPTED { 
if { [matchclass [IP::client_addr] equals $::poc_proxy_test] } {
 IronPort Address
node 216.64.12.215 0
}
 }