龙敢 發表於 2008-9-8 18:49:20

FreeBSD双线负载均衡NAT服务器配置方法

# vi /etc/rc.conf<br />
================+==============+=================<br />
defaultrouter=&quot;221.33.88.254&quot;<br />
ifconfig_fxp0=&quot;inet 192.168.0.1 netmask 255.255.255.0&quot;<br />
ifconfig_rl0=&quot;inet 221.33.88.2 netmask 255.255.255.0&quot;<br />
ifconfig_rl1=&quot;inet 202.0.57.1 netmask 255.255.255.0&quot;<br />
pf_enable=&quot;YES&quot;<br />
================+==============+=================
# vi /etc/pf.conf<br />
================+==============+=================<br />
##anchors<br />
lan_net = &quot;192.168.0.0/24&quot;<br />
int_if&nbsp; = &quot;fxp0&quot;<br />
ext_if1 = &quot;rl0&quot;<br />
ext_if2 = &quot;rl1&quot;<br />
ext_gw1 = &quot;221.33.88.254&quot;<br />
ext_gw2 = &quot;61.0.57.254&quot;
##nat outgoing connections on each internet interface<br />
nat on $ext_if1 from $lan_net to any -&gt; ($ext_if1)<br />
nat on $ext_if2 from $lan_net to any -&gt; ($ext_if2)
##default deny<br />
block in&nbsp; from any to any<br />
block out from any to any
##pass all outgoing packets on internal interface<br />
pass out on $int_if from any to $lan_net<br />
##pass in quick any packets destined for the gateway itself<br />
pass in quick on $int_if from $lan_net to $int_if<br />
##load balance outgoing tcp traffic from internal network. <br />
pass in on $int_if route-to \<br />
{ ($ext_if1 $ext_gw1), ($ext_if2 $ext_gw2) } round-robin \<br />
proto tcp from $lan_net to any flags S/SA modulate state<br />
##load balance outgoing udp and icmp traffic from internal network<br />
pass in on $int_if route-to \<br />
{ ($ext_if1 $ext_gw1), ($ext_if2 $ext_gw2) } round-robin \<br />
proto { udp, icmp } from $lan_net to any keep state
##general &quot;pass out&quot; rules for external interfaces<br />
pass out on $ext_if1 proto tcp from any to any flags S/SA modulate state<br />
pass out on $ext_if1 proto { udp, icmp } from any to any keep state<br />
pass out on $ext_if2 proto tcp from any to any flags S/SA modulate state<br />
pass out on $ext_if2 proto { udp, icmp } from any to any keep state
##route packets from any IPs on $ext_if1 to $ext_gw1 and the same for<br />
##$ext_if2 and $ext_gw2<br />
pass out on $ext_if1 route-to ($ext_if2 $ext_gw2) from $ext_if2 to any <br />
pass out on $ext_if2 route-to ($ext_if1 $ext_gw1) from $ext_if1 to any<br />
================+==============+=================
# vi /etc/sysctl.conf<br />
net.inet.ip.forwarding=1
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