Sometimes it is needed to track XML RPC calls which are sent by POA to an external system (e.g. PBA, Sitebuilder, ZKM, COMET, ODIN, etc) or back.
Run the 'tcpdump' utility on POA Management Node with the following options:
tcpdump -pnXs0 host <external.system.ip.address> -w out.file
tcpdump -pnXs0 -i <iface> host <external.system.ip.address> -w out.file
in case you have to specify the exact network interface.
After you captured required packets, check output in the out.file file.
The same way may be used on PBA Management Node as well.