【标题】：OpenBSD 3.8 + PF + PFSYNC + CARP
【关键字】：OpenBSD,3.8,PF,PFSYNC,CARP
【来源】：http://www.cublog.cn/u/6402/showart.php?id=189033

OpenBSD 3.8 + PF + PFSYNC + CARP

OpenBSD 3.8 + PF + PFSYNC + CARP
日期:2005.12.1
作者:congli

参考:http://www.countersiege.com/doc/pfsync-carp/
参考:pfsync 及 carp 手册

实验环境:
VMWare 5.5,虚拟三台BSD,两台OpenBSD,一台FreeBSD.每台OpenBSD均有三块网卡.
虚拟机1:
名称:OpenBSD(GZ)
网卡pcn0:192.168.0.110/24 (接外网 vmnet0 桥接 192.168.0.0/24)
网卡pcn1:192.168.20.110/24 (接内网 vmnet2 NAT 192.168.20.0/24)
网卡pcn2:192.168.30.110/24 (pfsync vmnet3 NAT 192.168.30.0/24)
网关:192.168.0.254

虚拟机2:
名称:OpenBSD(PY)
网卡pcn0:192.168.0.120/24 (接外网 vmnet0 桥接 192.168.0.0/24)
网卡pcn1:192.168.20.120/24 (接内网 vmnet2 NAT 192.168.20.0/24)
网卡pcn2:192.168.30.120/24 (pfsync vmnet3 NAT 192.168.30.0/24)
网关:192.168.0.254

虚拟机3:
名称:FreeBSD
网卡lnc0:192.168.20.10/24 (接内网 vmnet2 NAT 192.168.20.0/24)
网关:192.168.20.200

图片附件: OpenBSD_PF_PFSYNC_CARP.jpg (2005-12-2 09:16, 22.64 K)

设置:
1./etc/pf.conf(两台OpenBSD使用相同的规则),下面的规则非常简单,只用于测试.

CODE:

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ext_if = "pcn0"
int_if = "pcn1"
sync_if = "pcn2"
loop_if = "lo0"

nat on $ext_if from $int_if:network to any -> $ext_if

pass quick on { $sync_if } proto pfsync
pass on { $ext_if $int_if } proto carp keep state

pass in quick all keep state
pass out quick all keep state

2.在OpenBSD(GZ)和OpenBSD(PY)中,分别增加下面文件.
# vi /etc/hostname.carp0

CODE:

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vhid 1 pass foo 192.168.0.200 255.255.255.0

# vi /etc/hostname.carp1

CODE:

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vhid 2 pass bar 192.168.20.200 255.255.255.0

# vi /etc/hostname.pfsync0

CODE:

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syncpeer 192.168.30.200 syncdev pcn2

# vi /etc/rc.conf.local

CODE:

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pf=YES

3.设置FreeBSD
# vi /etc/rc.conf

CODE:

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defaultrouter="192.168.20.200"
ifconfig_lnc0="inet 192.168.20.10 netmask 255.255.255.0"

# vi /etc/resolv.conf

CODE:

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nameserver 202.96.128.68
nameserver 202.96.134.133

4.设置完毕之后,重启三台虚拟机.

5.简单测试:
在FreeBSD虚拟机中,ping一个Internet上的真实IP,随便关闭那一台OpenBSD都可以.

附ifconfig
1.OpenBSD(GZ)

CODE:

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lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33224
      groups: lo
      inet 127.0.0.1 netmask 0xff000000
pcn0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
      lladdr 00:0c:29:fe:67:4b
      groups: egress
      media: Ethernet autoselect (autoselect)
      inet 192.168.0.110 netmask 0xffffff00 broadcast 192.168.0.255
pcn1: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
      lladdr 00:0c:29:fe:67:55
      media: Ethernet autoselect (autoselect)
      inet 192.168.20.110 netmask 0xffffff00 broadcast 192.168.20.255
pcn2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      lladdr 00:0c:29:fe:67:5f
      media: Ethernet autoselect (autoselect)
      inet 192.168.30.110 netmask 0xffffff00 broadcast 192.168.30.255
pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33224
pfsync0: flags=0<> mtu 1348
      pfsync: syncdev: pcn2 syncpeer: 192.168.30.200 maxupd: 128
enc0: flags=0<> mtu 1536
carp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      carp: BACKUP carpdev pcn0 vhid 1 advbase 1 advskew 0
      groups: carp
      inet 192.168.0.200 netmask 0xffffff00 broadcast 255.255.255.0
carp1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      carp: BACKUP carpdev pcn1 vhid 2 advbase 1 advskew 0
      groups: carp
      inet 192.168.20.200 netmask 0xffffff00 broadcast 255.255.255.0

2.OpenBSD(PY)

CODE:

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lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33224
      groups: lo
      inet 127.0.0.1 netmask 0xff000000
pcn0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
      lladdr 00:0c:29:cc:f5:37
      groups: egress
      media: Ethernet autoselect (autoselect)
      inet 192.168.0.120 netmask 0xffffff00 broadcast 192.168.0.255
pcn1: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
      lladdr 00:0c:29:cc:f5:41
      media: Ethernet autoselect (autoselect)
      inet 192.168.20.120 netmask 0xffffff00 broadcast 192.168.20.255
pcn2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      lladdr 00:0c:29:cc:f5:4b
      media: Ethernet autoselect (autoselect)
      inet 192.168.30.120 netmask 0xffffff00 broadcast 192.168.30.255
pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33224
pfsync0: flags=0<> mtu 1348
      pfsync: syncdev: pcn2 syncpeer: 192.168.30.200 maxupd: 128
enc0: flags=0<> mtu 1536
carp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      carp: MASTER carpdev pcn0 vhid 1 advbase 1 advskew 0
      groups: carp
      inet 192.168.0.200 netmask 0xffffff00 broadcast 255.255.255.0
carp1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      carp: MASTER carpdev pcn1 vhid 2 advbase 1 advskew 0
      groups: carp
      inet 192.168.20.200 netmask 0xffffff00 broadcast 255.255.255.0

3.FreeBSD

CODE:

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# ifconfig
lnc0: flags=108843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
      inet 192.168.20.10 netmask 0xffffff00 broadcast 192.168.20.255
      inet6 fe80::20c:29ff:fe1d:bbda%lnc0 prefixlen 64 scopeid 0x1
      ether 00:0c:29:1d:bb:da

[ 本帖最后由 congli 于 2005-12-2 09:18 编辑 ]

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