B) No no, Im talking about the telnet client (so using the -b option) and the netcat client. Also when speaking about SAP the parameter "icm/local_addr" for the ICM affects to the connections as client and does not apply to any server socket.
For sure you are right and this is a requierement that is mandatory for all server applications, but also quite common for client applications. Regarding browsers and email clients I have no idea if this is possible somehow on the configuration, but maybe the requirement is not so common and there is no such possibility.
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