Question about "useragent PORT" in 11.6

My ATA has a field that they call “UserAgentPort”. The help for it reads “UDP port for tx/rx sip packets”. It is separate from the Proxy Port. They say changing it to a higher number port or unused port can improve security and reduce sip scanner calls. It is configurable [in fact I think must be different] for each ITSP. Is there an equivalent setting in Asterisk 11.6? I tried the “port” setting in the “individual” sections as opposed to General but could not get it to work. Is the udpbind address with port addition the answer? I didn’t know if it could be specified in each section differently. Thanks.

bindport in general sets the local port number. port in a specific section sets the port being used by the remote side (normally for a static address).