以下代码以本机81端口转发到本机80端口为例
CentOS 6 使用iptables实现:
echo net.ipv4.ip_forward=1>>/etc/sysctl.conf
sysctl -p
iptables -A INPUT -m tcp -p tcp –dport 81 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp –dport 81 -j REDIRECT –to-ports 80
service iptables save
service iptables restart
CentOS 7 使用firewalld实现:
echo net.ipv4.ip_forward=1>>/etc/sysctl.conf
sysctl -p
firewall-cmd –zone=public –add-port=81/tcp –permanent
firewall-cmd –add-masquerade –permanent
firewall-cmd –add-forward-port=port=81:proto=tcp:toport=80 –permanent
firewall-cmd –reload
使用端口转发之后,就可以配合免备案CDN实现相应的(具体不明说了)