??????????VPS????Getting Started With Linode??????????????????VPN?????????????????????/etc/apt/sources.list?????”##universe repositories”??????????????????????????????sudo???root?????????????????
## main & restricted repositories
deb http://us.archive.ubuntu.com/ubuntu/ karmic main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ karmic main restricted
deb http://security.ubuntu.com/ubuntu karmic-security main restricted
deb-src http://security.ubuntu.com/ubuntu karmic-security main restricted
## universe repositories
deb http://us.archive.ubuntu.com/ubuntu/ karmic universe
deb-src http://us.archive.ubuntu.com/ubuntu/ karmic universe
deb http://us.archive.ubuntu.com/ubuntu/ karmic-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ karmic-updates universe
deb http://security.ubuntu.com/ubuntu karmic-security universe
deb-src http://security.ubuntu.com/ubuntu karmic-security universe
??????????????????
apt-get update
??????????VPN Server????????pptp(VPN ?????),???????????????????????
apt-get install pptpd
pptpd????????/etc/pptpd.conf?????????????????????(??????).??????ip??????
localip 192.168.7.1
remoteip 192.168.0.2-254
???/etc/ppp/chap-secrets?????VPN??????????,???????
username pptpd password *
?????????VPN???????????????????DNS. ??/etc/ppp/options???ms-dns????????DNS.???????Google ?????Public DNS,????????
ms-dns 8.8.8.8
ms-dns 209.244.0.3
ms-dns 208.67.222.222
ms-dns 8.8.4.4
??/etc/sysctl.conf?????”net.ipv4.ip_forward=1″????????????
net.ipv4.ip_forward=1
?????????????
sysctl -p
??pptpd??
/etc/init.d/pptpd restart
????iptables??
/sbin/iptables -t nat -A POSTROUTING -s 192.168.7.0/255.255.255.0 -j SNAT --to-source `ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk 'NR==1 { print $1}'`
OK,?????