# vi /etc/rc.conf

================+==============+=================

defaultrouter="221.33.88.254"

ifconfig_fxp0="inet 192.168.0.1 netmask 255.255.255.0"

ifconfig_rl0="inet 221.33.88.2 netmask 255.255.255.0"

ifconfig_rl1="inet 202.0.57.1 netmask 255.255.255.0"

pf_enable="YES"

================+==============+================= # vi /etc/pf.conf

================+==============+=================

##anchors

lan_net = "192.168.0.0/24"

int_if = "fxp0"

ext_if1 = "rl0"

ext_if2 = "rl1"

ext_gw1 = "221.33.88.254"

ext_gw2 = "61.0.57.254" ##nat outgoing connections on each internet interface

nat on $ext_if1 from $lan_net to any -> ($ext_if1)

nat on $ext_if2 from $lan_net to any -> ($ext_if2) ##default deny

block in from any to any

block out from any to any ##pass all outgoing packets on internal interface

pass out on $int_if from any to $lan_net

##pass in quick any packets destined for the gateway itself

pass in quick on $int_if from $lan_net to $int_if

##load balance outgoing tcp traffic from internal network.

pass in on $int_if route-to

{ ($ext_if1 $ext_gw1), ($ext_if2 $ext_gw2) } round-robin

proto tcp from $lan_net to any flags S/SA modulate state

##load balance outgoing udp and icmp traffic from internal network

pass in on $int_if route-to

{ ($ext_if1 $ext_gw1), ($ext_if2 $ext_gw2) } round-robin

proto { udp, icmp } from $lan_net to any keep state ##general "pass out" rules for external interfaces

pass out on $ext_if1 proto tcp from any to any flags S/SA modulate state

pass out on $ext_if1 proto { udp, icmp } from any to any keep state

pass out on $ext_if2 proto tcp from any to any flags S/SA modulate state

pass out on $ext_if2 proto { udp, icmp } from any to any keep state ##route packets from any IPs on $ext_if1 to $ext_gw1 and the same for

##$ext_if2 and $ext_gw2

pass out on $ext_if1 route-to ($ext_if2 $ext_gw2) from $ext_if2 to any

pass out on $ext_if2 route-to ($ext_if1 $ext_gw1) from $ext_if1 to any

================+==============+================= # vi /etc/sysctl.conf

net.inet.ip.forwarding=1