The MiniUPnP project is a library and a daemon.
The library is aimed to enable applications to use
the capabilities of a UPnP Internet Gateway Device present on the network to forward ports. The daemon adds the UPnP Internet Gateway Device functionality to a NAT gateway running
OpenBSD/NetBSD/FreeBSD/Solaris with PF/IPF or Linux 2.4.x/2.6.x with netfilter. One of its most
interesting features is to enforce some
permissions to allow or deny redirections,
bringing some security to UPnP. Newer versions also support the NAT-PMP protocol from Apple.
