OS: 2.x
配置網卡的IP地址：
# vi /etc/ifconfig.rtk0
inet 192.168.0.1 netmask 255.255.255.0
# vi /etc/ifconfig.tlp0
inet 192.168.1.2 netmask 255.255.255.0
配置主機名：
# vi /etc/myname
netbsd
# vi /etc/hosts
127.0.0.1 localhost netbsd
配置DNS解析：
# vi /etc/resolv.conf
nameserver 202.99.160.68
nameserver 202.99.168.8
配置網關：
# vi /etc/mygate
192.168.0.10
配置主機本地解析：
# vi /etc/hosts
192.168.0.10 win2k
配置SSHD服務：
# vi /etc/defaults/rc.conf
sshd=YES
# vi /etc/ssh/sshd_config
PermitRootLogin yes
安裝配置ADSL:
# pkg_add rp-pppoe-3.5.tgz
# mkdir /etc/ppp
# cp /usr/pkg/share/examples/rp-pppoe/pppoe.conf /etc/ppp/pppoe.conf
# adsl-start
配置防火牆代理上網：
# vi /etc/ipf.conf
=================================/etc/ipf.conf==============================
# +-----------+ +------------------------------+ +------------------+
# | ADSL-Modem|---| ppp0 tlp0 NAT+IPF rtk0 |---| Internal Network |
# +-----------+ +------------------------------+ +------------------+
#
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# Interface: all
# Block all incoming and outgoing packets unless they're allowed later.
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
block in all
block out all
# Possibly dangerous: packets with ip-options, short and fragmented packets
block in log quick on ppp0 proto icmp from any to any
block in log quick all with short
block in log quick all with ipopts
block in log quick all with frag
block in log quick all with opt lsrr
block in log quick all with opt ssrr
# Local network traffic is allowed
pass out quick on lo0
pass in quick on lo0
pass out quick on rtk0
pass in quick on rtk0
# Block faked or unlikely "local" addresses
block in log body quick on ppp0 from 192.168.0.0/16 to any
block in log body quick on ppp0 from 172.16.0.0/12 to any
block in log body quick on ppp0 from 10.0.0.0/8 to any
block in log body quick on ppp0 from 192.0.2.0/24 to any
block in log body quick on ppp0 from 0.0.0.0/8 to any
block in log body quick on ppp0 from 127.0.0.0/8 to any
block in log body quick on ppp0 from 169.254.0.0/16 to any
block in log body quick on ppp0 from 224.0.0.0/3 to any
block in log body quick on ppp0 from 204.152.64.0/23 to any
# Blocking of outgoing faked or unlikely "internal" addresses
block out log body quick on ppp0 from any to 192.168.0.0/16
block out log body quick on ppp0 from any to 172.16.0.0/12
block out log body quick on ppp0 from any to 10.0.0.0/8
block out log body quick on ppp0 from any to 127.0.0.0/8
block out log body quick on ppp0 from any to 0.0.0.0/8
block out log body quick on ppp0 from any to 169.254.0.0/16
block out log body quick on ppp0 from any to 192.0.2.0/24
block out log body quick on ppp0 from any to 204.152.64.0/23
block out log body quick on ppp0 from any to 224.0.0.0/3
# The pass rules to enable Services
pass in on ppp0 proto tcp from any to any port = 20 flags S keep state
pass in on ppp0 proto tcp from any to any port = 21 flags S keep state
pass in on ppp0 proto tcp from any to any port = 22 flags S keep state
pass in on ppp0 proto tcp from any to any port = 25 flags S keep state
pass in on ppp0 proto tcp from any to any port = 80 flags S keep state
pass in on ppp0 proto tcp from any to any port = 110 flags S keep state
pass in on ppp0 proto tcp from any to any port = 443 flags S keep state
pass in on ppp0 proto tcp from any to any port 55000 >;< 56000 flags S keep state
# The general pass rules.
pass out quick on ppp0 proto tcp from any to any flags S/SAFR keep state keep frags
pass out quick on ppp0 proto udp from any to any keep state keep frags
pass out quick on ppp0 proto icmp from any to any keep state keep frags
=================================/etc/ipf.conf==============================
# vi /etc/sysctl.conf
net.inet.ip.forwarding=1
net.inet.tcp.mss_ifmtu=1
# vi /etc/ipnat.conf
map ppp0 192.168.0.0/24 ->; 0/32 proxy port ftp ftp/tcp mssclamp 1440
map ppp0 192.168.0.0/24 ->; 0/32 portmap tcp/udp auto mssclamp 1440
map ppp0 192.168.0.0/24 ->; 0/32 mssclamp 1440
啟用防火牆設置:
# vi /etc/defaults/rc.conf
ipfilter=YES # uses /etc/ipf.conf
ipnat=YES # uses /etc/ipnat.conf
ipfs=YES ipfs_flags="" # save/load ipnat and ipf states
ifwatchd=YES
配置動態域名更新：
# wget http://www.3322.org/dyndnspage/ez-ipupdate-3.0.10.tgz
# tar zxvf ez-ipupdate-3.0.10.tgz
# cd ez-ipupdate-3.0.10
# vi conf_file.c
增加一行：
#include <errno.h>;
# vi ez-ipupdate.c
注釋掉下面幾行(4515行)：
//else
// {
// fprintf(stderr, "no update needed at this time\n";
// }
# ./configure
# make
# make install
設置撥號後自動運行：
# vi /etc/ppp/ip-up
#!/bin/sh
/usr/local/bin/ez-ipupdate -i ppp0 -h nero.3322.org -S qdns -u llzqq:9335333
# chmod 700 /etc/ppp/ip-up