MY PF.CONF

lan_net = "192.168.24.0/24"
int_if  = "vr0"
ext_if1 = "dc0"
ext_if2 = "dc1"
ext_gw1 = "125.251.99.75"
ext_gw2 = "202.146.38.155"

nat on $ext_if1 from $lan_net to any -> ($ext_if1)
nat on $ext_if2 from $lan_net to any -> ($ext_if2)

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

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

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


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

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

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 

MY NET INTREFACE IP ADD


/etc/hostname.dc0
inet 125.251.99.75 255.255.255.240 NONE 
!route add -mpath default 125.251.99.65

/etc/hostname.dc1
inet 202.146.38.155 255.255.255.128 NONE
!route add -mpath default 202.146.38.129





MY SYSCTL
#	$OpenBSD: sysctl.conf,v 1.42 2007/02/15 20:43:33 reyk Exp $
#
# This file contains a list of sysctl options the user wants set at
# boot time.  See sysctl(3) and sysctl(8) for more information on
# the many available variables.
#
net.inet.ip.forwarding=1	# 1=Permit forwarding (routing) of IPv4 packets
net.inet.ip.multipath=1
net.inet.ip.mforwarding=1	# 1=Permit forwarding (routing) of IPv4 multicast packets
#net.inet6.ip6.forwarding=1	# 1=Permit forwarding (routing) of IPv6 packets
#net.inet6.ip6.mforwarding=1	# 1=Permit forwarding (routing) of IPv6 multicast packets
#net.inet6.ip6.accept_rtadv=1	# 1=Permit IPv6 autoconf (forwarding must be 0)
#net.inet.tcp.rfc1323=0		# 0=Disable TCP RFC1323 extensions (for if tcp is slow)
#net.inet.tcp.rfc3390=0		# 0=Disable RFC3390 for TCP window increasing
#net.inet.esp.enable=0		# 0=Disable the ESP IPsec protocol
#net.inet.ah.enable=0		# 0=Disable the AH IPsec protocol
#net.inet.esp.udpencap=0	# 0=Disable ESP-in-UDP encapsulation
#net.inet.ipcomp.enable=1	# 1=Enable the IPCOMP protocol
#net.inet.etherip.allow=1	# 1=Enable the Ethernet-over-IP protocol
#net.inet.tcp.ecn=1		# 1=Enable the TCP ECN extension
#net.inet.carp.preempt=1	# 1=Enable carp(4) preemption
#net.inet.carp.log=1		# 1=Enable logging of carp(4) packets
#ddb.panic=0			# 0=Do not drop into ddb on a kernel panic
#ddb.console=1			# 1=Permit entry of ddb from the console
#fs.posix.setuid=0		# 0=Traditional BSD chown() semantics
#vm.swapencrypt.enable=0	# 0=Do not encrypt pages that go to swap
#vfs.nfs.iothreads=4		# number of nfsio kernel threads
#net.inet.ip.mtudisc=0		# 0=disable tcp mtu discovery
#kern.usercrypto=0		# 0=disable userland use of /dev/crypto
#kern.splassert=2		# 2=enable with verbose error messages
machdep.allowaperture=2		# See xf86(4)
#machdep.apmwarn=10		# battery % when apm status messages enabled
#machdep.apmhalt=1		# 1=powerdown hack, try if halt -p doesn't work
#machdep.kbdreset=1		# permit console CTRL-ALT-DEL to do a nice halt
#machdep.userldt=1		# allow userland programs to play with ldt,
				# required by some ports
#kern.emul.aout=1		# enable running dynamic OpenBSD a.out bins
#kern.emul.bsdos=1		# enable running BSD/OS binaries
#kern.emul.freebsd=1		# enable running FreeBSD binaries
#kern.emul.ibcs2=1		# enable running iBCS2 binaries
#kern.emul.linux=1		# enable running Linux binaries
#kern.emul.svr4=1		# enable running SVR4 binaries