将本地3389端口 转发到192.168.10.210的22(主要访问到本机的15210端口,就会跳转到192.168.10.210的22) 【步骤】 1、 首先应该做的是/etc/sysctl.conf配置文件的 net.ipv4.ip_forward = 1 默认是0 这样允许iptalbes FORWARD。 vim /etc/sysctl.conf # 找到下面的值并将0改成1 net.ipv4.ip_forward = 1 # sysctl –p(使之立即生效) 2、 修改 iptables vim /etc/sysconfig/iptables # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. # nat部分正是需要求 *nat :PREROUTING ACCEPT [10000:20000] :POSTROUTING ACCEPT [20:20000] :OUTPUT ACCEPT [125:20000] -A PREROUTING -p tcp -m tcp --dport 15210 -j DNAT --to-destination 192.168.10.210:22 -A POSTROUTING -d 192.168.10.210/32 -p tcp -m tcp --dport 22 -j SNAT --to-source 192.168.10.250 COMMIT *filter :INPUT ACCEPT [25350:2120857] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [26183:2224589] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 808 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 3128 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 8088 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 15210 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 30001 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited #下面一句默认是有的,需要去掉,否则nat配置不起效 #-A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT 3、 重启iptables service iptables restart
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