OpenBSD PF負載均衡，奇怪現象.....

gofans

今天無聊！！


openbsd 4.2
openbsd 4.0


把原來雙線策略的網關，改為負載均衡！！

用的是 pf-faq裏面的規則http://openbsd.org/faq/pf/pools.html

lan_net = "192.168.0.0/24"
int_if  = "dc0"
ext_if1 = "fxp0"
ext_if2 = "fxp1"
ext_gw1 = "68.146.224.1"
ext_gw2 = "142.59.76.1"

#  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


之前也做過測試，當時沒有這方面的需要，沒有認真做過測試！

今天有空把它再拿出來用用！！ 其它的網頁，QQ，msn等很正常
測試下載，也算正常！！
問題來了
web迅雷，迅雷，FlashGet等, 把正在下載的東西，停止，過一兩秒再開，反復幾次！就沒流量！ ssh斷開，網頁打不開，ping 網關，正常！
在openBSD的控制台上用ifstat 可以看到，各個網卡出去的流量為0
ping 兩個網關，正常！！
於是重新加載pf規則
pfctl -Fa
pfctl -f /etc/pf.conf
無效，一樣

於是打上
sh /etc/netstart

終於有反映了，正常使用！！
再下載東西測試，結果還是一樣


那位有這方面的經驗，出來說說

hiler

怪事年年有,今年格外多
我用PF做重定向的情况是,中转服务器可以把客户端转给目标服务器,目标服务器回应给客户端,但是客户端收不到回应

gofans

就沒人碰到過！！！！
:wink: :wink: :wink: :wink:

cqyyhm

可能是内存池中用于流量整形的数据包参数值过低！！