I am still working on the same problem, I was able to get 2 ISPs load
balanced and even got the bandwidth aggregated. Now i am trying to
balance 3 ISPs and even with the multipath routing enabled and
cofigureed i am not able to even browse anything. Here is my pf.conf
lan_net = "10.15.0.0/16"
int_if = "fxp0"
ext_if1 = "em0"
ext_if2 = "em1"
ext_if1 = "em1"
ext_gw1 = "192.168.5.1"
ext_gw2 = "192.168.6.1"
ext_gw3 = "10.7.0.253"
nat on $ext_if1 from $lan_net to any -> ($ext_if1)
nat on $ext_if2 from $lan_net to any -> ($ext_if2)
nat on $ext_if3 from $lan_net to any -> ($ext_if3)
block in from any to any
block out from any to any
pass out on $int_if from any to $lan_net
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 $ext_gw2)
, ($ext_if3 $ext_gw3) } 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
$ext_gw2), ($ext_if3 $ext_gw3) } round-robin proto { udp, icmp } from
$lan_net to any keep state
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_if3 proto tcp from any to any flags S/SA modulate state
pass out on $ext_if3 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 $ext_if1 route-to ($ext_if3 $ext_gw3) from $ext_if3 to any
pass out on $ext_if2 route-to ($ext_if1 $ext_gw1) from $ext_if1 to any
pass out on $ext_if2 route-to ($ext_if3 $ext_gw3) from $ext_if3 to any
pass out on $ext_if3 route-to ($ext_if1 $ext_gw1) from $ext_if1 to any
pass out on $ext_if3 route-to ($ext_if2 $ext_gw2) from $ext_if2 to any
This setup is not working and the odd thing is i am not even able to
ping the local interfaces with this configurting.
Thanks for the help
Manpreet
