natpmpd(8) System Manager's Manual natpmpd(8)

natpmpd — NAT Port mapping daemon.

natpmpd [-d] [-k mssclamp] [-x/y privateIfName] publicIfName

natpmpd is a daemon implementing NAT-PMP. NAT-PMP is a protocol for handling port forwarding requests from clients behind a NAT. It is normally invoked by InternetSharing(8)

The options are as follows:

publicinterface
The private interfaces that need the use the service.

com.apple/100.InternetSharing/natpmp PF anchor is required for this daemon to correctly function.

InternetSharing(8), pf.conf(5)

March 16, 2011 Darwin