This parameter specifies the port number of the RADIUS,
Radsec, or TACACS+ client that receives the request. It supports both IPv4
and IPv6. You can use an exact, alternation, or regular expression match.
Here are examples of using different matches:
RecvPort=1812
RecvPort=/164./
Tip
In Handler clauses, it can be
useful to provide special handling of requests received by a specific
port: