1#!/sbin/ipnat -f - 2# 3# THIS EXAMPLE IS WRITTEN FOR IP FILTER 3.3 4# 5# ppp0 - (external) PPP connection to ISP, address a.b.c.d/32 6# 7# ed0 - (internal) network interface, address w.x.y.z/32 8# 9# If we have only 1 valid IP address from our ISP, then we do this: 10# 11# To make ftp work, using the internal ftp proxy, use: 12# 13map ppp0 w.x.y.z/24 -> a.b.c.d/32 proxy port ftp ftp/tcp 14# 15# For normal TCP/UDP and other IP protocols 16# 17map ppp0 w.x.y.z/24 -> a.b.c.d/32 portmap tcp/udp 40000:60000 18map ppp0 w.x.y.z/24 -> a.b.c.d/32 19# 20# if we get a different dialup IP address each time, then we would use: 21# 22#map ppp0 w.x.y.z/24 -> 0/32 portmap tcp/udp 40000:60000 23#map ppp0 w.x.y.z/24 -> 0/32 24# 25# If we have a class C address space of valid IP#'s from our ISP, then we can 26# do this: 27# 28#map ppp0 w.x.y.z/24 -> a.b.c.d/24 portmap tcp/udp 40000:60000 29#map ppp0 w.x.y.z/24 -> a.b.c.d/24 30# 31# or, if we only have a small number of PC's, this: 32# 33#map ppp0 w.x.y.v/32 -> a.b.c.E/32 portmap tcp/udp 40000:60000 34#map ppp0 w.x.y.v/32 -> a.b.c.E/32 35#map ppp0 w.x.y.u/32 -> a.b.c.F/32 portmap tcp/udp 40000:60000 36#map ppp0 w.x.y.u/32 -> a.b.c.F/32 37#map ppp0 w.x.y.t/32 -> a.b.c.G/32 portmap tcp/udp 40000:60000 38#map ppp0 w.x.y.t/32 -> a.b.c.G/32 39#map ppp0 w.x.y.s/32 -> a.b.c.H/32 portmap tcp/udp 40000:60000 40#map ppp0 w.x.y.s/32 -> a.b.c.H/32 41#map ppp0 w.x.y.r/32 -> a.b.c.I/32 portmap tcp/udp 40000:60000 42#map ppp0 w.x.y.r/32 -> a.b.c.I/32 43#map ppp0 w.x.y.q/32 -> a.b.c.J/32 portmap tcp/udp 40000:60000 44#map ppp0 w.x.y.q/32 -> a.b.c.J/32 45#map ppp0 w.x.y.p/32 -> a.b.c.K/32 portmap tcp/udp 40000:60000 46#map ppp0 w.x.y.p/32 -> a.b.c.K/32 47