2

我需要一点帮助。

我的 rc.conf：

gateway_enable="YES"
natd_enable="YES"
natd_interface="xl0"
natd_flags="-f /etc/natd.conf"

ifconfig_xl0="inet 74.92.224.225 netmask 255.255.255.0"
ifconfig_xl0_alias0="inet 74.92.224.227 netmask 255.255.255.255"
ifconfig_xl0_alias1="inet 74.92.224.226 netmask 255.255.255.255"
ifconfig_xl0_alias2="inet 74.92.224.228 netmask 255.255.255.255"
ifconfig_xl0_alias3="inet 74.92.224.229 netmask 255.255.255.255"

ifconfig_re0="up"
ifconfig_re1="up"
cloned_interfaces="lagg0"
ifconfig_lagg0="laggproto loadbalance laggport re0 laggport re1 172.27.240.33 netmask 255.255.0.0"

firewall_client_net="172.27.0.0:255.255.0.0"
firewall_enable="YES"
firewall_logging="YES"
firewall_type="/etc/ipfw.rules"

我的 natd.conf：

interface xl0
use_sockets yes
same_ports yes
redirect_address 172.27.240.44 74.92.224.227

我的 ipfw.rules：

add 50 divert natd log ip4 from any to any via xl0
add 2000 pass all from 172.27.0.0:255.255.0.0 to 172.27.0.0:255.255.0.0 via 172.27.240.33
add 2040 deny log all from any 23 to any
add 2050 deny log all from any to any 23
add 2060 deny log all from any 111 to any
add 2070 deny log all from any to any 111
add 2080 deny log all from any 221 to any
add 2090 deny log all from any to any 221
add 2100 deny log all from any 222 to any
add 2110 deny log all from any to any 222
add 5000 pass all from any to any

一切正常，期望进入 74.92.224.227 不会进入 172.27.240.44 它最终在网关上正常但不在 LAN 上。

thx 在此先感谢。

大学教师

4

1 回答 1

0

据我了解，您想对来自 172.27.240.44 到 74.92.224.227 的所有数据包进行 NAT 转换？另外我认为您在 ipfw 规则文件中的语法不正确。

我宁愿使用ipfw kernel nat：

rc.conf（不要忘记禁用 LRO/TSO，因为目前libalias不能正确使用此选项）：

gateway_enable="YES"
firewall_enable="YES"
firewall_script="/etc/ipfw.rules"
firewall_nat_enable="YES"
firewall_logging="YES"

ifconfig_re0="up -rxcsum -txcsum -tso -lro"
ifconfig_re1="up -rxcsum -txcsum -tso -lro"
ifconfig_xl0="up -rxcsum -txcsum -tso -lro"

ifconfig_xl0="inet 74.92.224.225 netmask 255.255.255.0"
ifconfig_xl0_alias0="inet 74.92.224.227 netmask 255.255.255.255"
ifconfig_xl0_alias1="inet 74.92.224.226 netmask 255.255.255.255"
ifconfig_xl0_alias2="inet 74.92.224.228 netmask 255.255.255.255"
ifconfig_xl0_alias3="inet 74.92.224.229 netmask 255.255.255.255"

cloned_interfaces="lagg0"
ifconfig_lagg0="laggproto loadbalance laggport re0 laggport re1 172.27.240.33 netmask 255.255.0.0"

/etc/ipfw.rules：

#!/bin/sh -

fwcmd="/sbin/ipfw"

${fwcmd} -f flush
${fwcmd} -q flush
${fwcmd} -q table all flush
${fwcmd} -q pipe flush all
${fwcmd} -q queue flush all

${fwcmd} nat 1 config ip 74.92.224.227 same_ports reset deny_in

# Pass local traffic
${fwcmd} add 101 allow all from any to any via lo0

# Apply NAT on external interface
${fwcmd} add 201 nat ip from 172.27.240.44 to any out xmit xl0
${fwcmd} add 202 nat ip from any to 74.92.224.227 in recv xl0

${fwcmd} add 301 allow all from 172.27.0.0/16 to 172.27.0.0/16 via re0

${fwcmd} add 2040 deny log all from any 23 to any
${fwcmd} add 2050 deny log all from any to any 23
${fwcmd} add 2060 deny log all from any 111 to any
${fwcmd} add 2070 deny log all from any to any 111
${fwcmd} add 2080 deny log all from any 221 to any
${fwcmd} add 2090 deny log all from any to any 221
${fwcmd} add 2100 deny log all from any 222 to any
${fwcmd} add 2110 deny log all from any to any 222
${fwcmd} add 5000 allow all from any to any

这里规则 201 会将来自 172.27.240.44 的所有数据包映射到 74.92.224.227。规则 202 将执行相反的操作。

于 2015-06-15T13:26:16.673 回答