#4 Port Range forwarding

[Anonymous]

Portfwd has great potential use for a home NAT machine,
but for some services, forwarding individual ports is
extremely tedious. It would be very convenient if
portfwd could work with port ranges. In these cases,
the port number on the destination address could be
considered the "base", so that in this case:

tcp {
100-110 { =>192.168.1.10:1000}
}

ports 100 to 110 would be forwarded to ports 1000 to
1010 on the destination host.

straight iptables rules are capable of accomplishing
this, but iptables is unable to resolve host names, a
very powerful feature on a lan whose IP addresses are
allocated dynamically.