indofreebsd#

buat ipnat.rules

indofreebsd#pico /etc/ipnat.rules 

# ------------------------------------------------------------
# Use ipfilter FTP proxy for the firewall doing transfer mode
# active.
# ------------------------------------------------------------
map rl0  0.0.0.0/0 -> 0.0.0.0/32 proxy port ftp ftp/tcp
# ------------------------------------------------------------
# Use ipfilter FTP proxy for hosts behind NAT doing transfer
# mode active.
# ------------------------------------------------------------
map rl0  192.168.0.0/24 -> 0.0.0.0/32 proxy port ftp ftp/tcp
# -----------------------------------------------------------
# Map all internal UDP and TCP traffic to the external IP address
# -----------------------------------------------------------
map rl0  192.168.0.0/24 -> 0.0.0.0/32  portmap tcp/udp 40000:60000
# -----------------------------------------------------------
# Map all other traffic e.g. ICMP to the external IP address
# -----------------------------------------------------------
map rl0  192.168.0.0/24 -> 0.0.0.0/32

lalu save

langkah selanjut nya adalah me restart nya

indofreebsd#reboot

test gateway anda dengan menghubungkan pc client pada gateway tersebut

kalo packet tidak berhasil di lewatkan artinya anda kurang teliti.

demikian langkah langkah pembuatan gateway menggunakan ipfw + ipnat

semoga berhasil.

salam,

ogeb