OPENBSD上的ADSL和防火墙设置

来源：作者：黑客基地出处：巧巧读书 2006-04-21 进入讨论组

　　偶在翻阅了大量网上文档后，实验整理了一下OPENBSD环境中ADSL、PF的配置过程。希望对OPENBSD的初学者有些帮助。下面我用的是OPENBSD 3.6

配置ADSL：
# vi /etc/ppp/ppp.conf
========================ppp.conf=======================

default:
set log Phase Chat IPCP CCP tun command
set redial 15 0
set reconnect 15 10000

pppoe:
set device "!/usr/sbin/pppoe -i rl1"
disable acfcomp protocomp
deny acfcomp
set mtu max 1492
set crtscts off
set speed sync
enable lqr
set lqrperiod 5
set cd 5
set dial
set login
set timeout 0
set authname "sjz681a0156@adsl2"
set authkey 123456
add! default HISADDR
enable mssfixup
========================ppp.conf=======================

建立防火墙代理配置：
# vi /etc/pf.conf
=========================pf.conf=======================
ext_if = "tun0"
int_if = "{ dc0, rl0 }"
int_net = "{ 192.168.0.0/24, 192.168.10.0/24 }"
loop = "lo0"
tcp_services = "{ www, ftp }"
boss_ip = "{ 192.168.10.10, 192.168.10.11, 192.168.10.12, 192.168.10.13, 192.168.10.14, 192.168.10.15 }"
noroute = "{ 127.0.0.1/8, 192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8, 255.255.255.255/32 }"
web_server = "{ 192.168.10.5, 192.168.100.16 }"
set block-policy return
set loginterface $ext_if

set optimization aggressive

scrub in all

altq on $int_if cbq bandwidth 1200Kb queue { dflt, boss }
queue dflt bandwidth 300Kb cbq(default)
queue boss bandwidth 900Kb cbq(borrow)

nat on $ext_if from $int_net to any -> $ext_if

block all

block return
block in quick on $ext_if os NMAP
block in quick on $ext_if from $noroute to any
block out quick on $ext_if from any to $noroute

pass in quick on $ext_if inet proto tcp from any to any port > 60000 keep state
#pass in quick on $ext_if inet proto icmp all icmp-type 8 code 0 keep state
pass in quick on $ext_if inet proto tcp from any to any port $tcp_services flags S/SAFR keep state

pass quick on $loop all
pass in on $int_if from $int_net
pass out on $int_if from any to $int_net
pass out on $int_if from any to $boss_ip queue boss
pass out on $ext_if all keep state

pass in on $ext_if inet proto tcp from any to $web_server port = 80 flags S/SAFR keep state (max 200, source-track rule, max-src-nodes 200, max-src-states 2) queue boss
=========================pf.conf=======================

禁用系统自定义的PF规则

# vi /etc/rc.conf
pf=NO

启用IP转发：
# vi /etc/sysctl.conf
net.inet.ip.forwarding=1

设置开机启动ADSL拨号：

# mkdir /etc/rc.d
# vi /etc/rc.d/adsl.sh
--------------+----------------+---------------+-------------
#!/bin/sh
# /etc/rc.d/adsl.sh
# 7-11-2004
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