-P option  --  entrance port(s) to the DeleGate
              ==  -Pport[,port]*
        port  ==  [host:]portNum[/udp][/admin][/protocolName]
     portNum  ==  number[-number]

This option specifies on which entrance port DeleGate receives requests from clients. As a typical example, "-P8080" means it accepts request on TCP port numbered 8080 on any network interface belong to the host machine. When the host has multiple interfaces or multiple IP addresses assigned to a single physical interface, you can select one of them with the specification format -Phost:portNum, like "-Plocalhost:8080" for example. A DeleGate server can accept from multiple ports or (limited) multiple network interfaces by -Pport,port,...
When no host is specified, only IPv4 addresses are accepted. That is, -P8080 is the abbreviation of "-P0.0.0.0:8080". To specify IPv6 address here, substitute each colon symbol in the IPv6 address notation with an under score symbol. Fore example, "-P__:8080" means accepting at port 8080 with the wild card address of IPv6 "::". If necessary, a scope-ID can be specified with "%" symbol, like "-Pfe80__12_34%en0:8080" for example.
Note: See SRCIF as to selection of a source address of an outgoing connection.

An entrance port is made as a TCP port by default except UDP based application protocol (dns, icp, cuseeme, udprelay) is specified in SERVER=protocol parameter. And regardless of the protocol specified in SERVER, it can be made as a UDP port with postfix "/udp" like -Pport/udp.

If "/protocolName" is specified, as "-P21/ftp,80/http,1080/socks" for example, the DeleGate will act in the specified application protocol on the specified port, rather than in the default protocol specified in the SERVER parameter.

This option MUST be specified except in following cases. It is ignored when the DeleGate is invoked from inetd(8), or in most case of -Ffunction option, or when running as a tunnel server with SERVER="tunnel1".