# port 21 ftp proxy mapping:
map tun0 192.168.0.0/24 -> 0/32 proxy port ftp ftp/tcp
# port 1337 ftp proxy mapping:
map tun0 192.168.0.0/24 -> 0/32 proxy port 1337 ftp/tcp
# map out the 256 addresses in 192.168.0.0/24 to non-service ports:
map tun0 192.168.0.0/24 -> 0/32 portmap tcp/udp 1025:65535
# finally map all from 192.168/24 to tun0/32:
map tun0 192.168.0.0/24 -> 0/32