HSA N9344C For remote control over LAN wich port or port range should be granted on firewall. when i use wireshark to find out 111,1024 port must be granted but one port is always changing. Also i need that port range. does have anyone have a similar experience.
That random port is truly random, I don't think it will be in a defined range (it just says, give me the next available port). This is all part of the VXI-11 protocol (which is based ONC/RPC and Portmapper).
An alternative approach is to use the raw TCP Socket interface at TCP port 5025. It only uses one port and allows you to send a receive SCPI commands/data.