SEO
手册
游戏
WEB
字典
单词
在线工具
当前位置:
首页
/
IT
/
程序
/
25 个常用的 Linux iptables 规则
25 个常用的 Linux iptables 规则
一些常用的 Linux iptables 规则,请根据自己的具体需要再修改。
# 1. 删除所有现有规则
iptables -F</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 1 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-v">F</span></td> </tr> </tbody></table> <h3># 2. 设置默认的 chain 策略</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 123 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">P</span><span class="crayon-h"> </span><span class="crayon-e">INPUT </span><span class="crayon-e">DROP</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">P</span><span class="crayon-h"> </span><span class="crayon-e">FORWARD </span><span class="crayon-e">DROP</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">P</span><span class="crayon-h"> </span><span class="crayon-e">OUTPUT </span><span class="crayon-v">DROP</span></td> </tr> </tbody></table> <h3># 3. 阻止某个特定的 IP 地址</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#BLOCK_THIS_IP="x.x.x.x" #iptables -A INPUT -s "$BLOCK_THIS_IP" -j DROP</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-p">#BLOCK_THIS_IP="x.x.x.x"</span><span class="crayon-p">#iptables -A INPUT -s "$BLOCK_THIS_IP" -j DROP</span></td> </tr> </tbody></table> <h3># 4. 允许全部进来的(incoming)SSH</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">22</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-r">NEW</span><span class="crayon-sy">,</span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sport</span><span class="crayon-h"> </span><span class="crayon-cn">22</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 5. 只允许某个特定网络进来的 SSH</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A INPUT -i eth0 -p tcp -s 192.168.200.0/24 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp -s 192.168.200.0/24 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 6. 允许进来的(incoming)HTTP</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">80</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-r">NEW</span><span class="crayon-sy">,</span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sport</span><span class="crayon-h"> </span><span class="crayon-cn">80</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 7. 多端口(允许进来的 SSH、HTTP 和 HTTPS)</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -i eth0 -p tcp -m multiport --dports 22,80,443 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp -m multiport --sports 22,80,443 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">multiport</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dports</span><span class="crayon-h"> </span><span class="crayon-cn">22</span><span class="crayon-sy">,</span><span class="crayon-cn">80</span><span class="crayon-sy">,</span><span class="crayon-cn">443</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-r">NEW</span><span class="crayon-sy">,</span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">multiport</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sports</span><span class="crayon-h"> </span><span class="crayon-cn">22</span><span class="crayon-sy">,</span><span class="crayon-cn">80</span><span class="crayon-sy">,</span><span class="crayon-cn">443</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 8. 允许出去的(outgoing)SSH</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A OUTPUT -o eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">22</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-r">NEW</span><span class="crayon-sy">,</span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sport</span><span class="crayon-h"> </span><span class="crayon-cn">22</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 9. 允许外出的(outgoing)SSH,但仅访问某个特定的网络</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A OUTPUT -o eth0 -p tcp -d 192.168.101.0/24 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A INPUT -i eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp -d 192.168.101.0/24 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 10. 允许外出的(outgoing) HTTPS</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A OUTPUT -o eth0 -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i eth0 -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">443</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-r">NEW</span><span class="crayon-sy">,</span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sport</span><span class="crayon-h"> </span><span class="crayon-cn">443</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 11. 对进来的 HTTPS 流量做负载均衡</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A PREROUTING -i eth0 -p tcp --dport 443 -m state --state NEW -m nth --counter 0 --every 3 --packet 0 -j DNAT --to-destination 192.168.1.101:443 #iptables -A PREROUTING -i eth0 -p tcp --dport 443 -m state --state NEW -m nth --counter 0 --every 3 --packet 1 -j DNAT --to-destination 192.168.1.102:443 #iptables -A PREROUTING -i eth0 -p tcp --dport 443 -m state --state NEW -m nth --counter 0 --every 3 --packet 2 -j DNAT --to-destination 192.168.1.103:443</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 123 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A PREROUTING -i eth0 -p tcp --dport 443 -m state --state NEW -m nth --counter 0 --every 3 --packet 0 -j DNAT --to-destination 192.168.1.101:443</span><span class="crayon-p">#iptables -A PREROUTING -i eth0 -p tcp --dport 443 -m state --state NEW -m nth --counter 0 --every 3 --packet 1 -j DNAT --to-destination 192.168.1.102:443</span><span class="crayon-p">#iptables -A PREROUTING -i eth0 -p tcp --dport 443 -m state --state NEW -m nth --counter 0 --every 3 --packet 2 -j DNAT --to-destination 192.168.1.103:443</span></td> </tr> </tbody></table> <h3># 12. 从内部向外部 Ping</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT iptables -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">icmp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">icmp</span><span class="crayon-o">-</span><span class="crayon-e">type </span><span class="crayon-v">echo</span><span class="crayon-o">-</span><span class="crayon-v">request</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">icmp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">icmp</span><span class="crayon-o">-</span><span class="crayon-e">type </span><span class="crayon-v">echo</span><span class="crayon-o">-</span><span class="crayon-v">reply</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 13. 从外部向内部 Ping</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT iptables -A OUTPUT -p icmp --icmp-type echo-reply -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">icmp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">icmp</span><span class="crayon-o">-</span><span class="crayon-e">type </span><span class="crayon-v">echo</span><span class="crayon-o">-</span><span class="crayon-v">request</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">icmp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">icmp</span><span class="crayon-o">-</span><span class="crayon-e">type </span><span class="crayon-v">echo</span><span class="crayon-o">-</span><span class="crayon-v">reply</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 14. 允许环回(loopback)访问</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">lo</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">lo</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 15. 允许 packets 从内网访问外网</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no"># if eth1 is connected to external network (internet) # if eth0 is connected to internal network (192.168.1.x) iptables -A FORWARD -i eth0 -o eth1 -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 123 </td> <td class="crayon-code"><span class="crayon-p"># if eth1 is connected to external network (internet)</span><span class="crayon-p"># if eth0 is connected to internal network (192.168.1.x)</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">FORWARD</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth1</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 16. 允许外出的 DNS</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A OUTPUT -p udp -o eth0 --dport 53 -j ACCEPT iptables -A INPUT -p udp -i eth0 --sport 53 -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">udp</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">53</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">udp</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sport</span><span class="crayon-h"> </span><span class="crayon-cn">53</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 17. 允许 NIS 连接</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no"># rpcinfo -p | grep ypbind ; This port is 853 and 850 #iptables -A INPUT -p tcp --dport 111 -j ACCEPT #iptables -A INPUT -p udp --dport 111 -j ACCEPT #iptables -A INPUT -p tcp --dport 853 -j ACCEPT #iptables -A INPUT -p udp --dport 853 -j ACCEPT #iptables -A INPUT -p tcp --dport 850 -j ACCEPT #iptables -A INPUT -p udp --dport 850 -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 1234567 </td> <td class="crayon-code"><span class="crayon-p"># rpcinfo -p | grep ypbind ; This port is 853 and 850</span><span class="crayon-p">#iptables -A INPUT -p tcp --dport 111 -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -p udp --dport 111 -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -p tcp --dport 853 -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -p udp --dport 853 -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -p tcp --dport 850 -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -p udp --dport 850 -j ACCEPT</span></td> </tr> </tbody></table> <h3># 18. 允许某个特定网络 rsync 进入本机</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A INPUT -i eth0 -p tcp -s 192.168.101.0/24 --dport 873 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 873 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp -s 192.168.101.0/24 --dport 873 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 873 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 19. 仅允许来自某个特定网络的 MySQL 的链接</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A INPUT -i eth0 -p tcp -s 192.168.200.0/24 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 3306 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp -s 192.168.200.0/24 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 3306 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 20. 允许 Sendmail 或 Postfix</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -i eth0 -p tcp --dport 25 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 25 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 12 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">i</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">25</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-r">NEW</span><span class="crayon-sy">,</span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">ACCEPT</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">OUTPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">o</span><span class="crayon-h"> </span><span class="crayon-v">eth0</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">sport</span><span class="crayon-h"> </span><span class="crayon-cn">25</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">state</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-e">state </span><span class="crayon-v">ESTABLISHED</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 21. 允许 IMAP 和 IMAPS</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A INPUT -i eth0 -p tcp --dport 143 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 143 -m state --state ESTABLISHED -j ACCEPT #iptables -A INPUT -i eth0 -p tcp --dport 993 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 993 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 1234 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp --dport 143 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 143 -m state --state ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp --dport 993 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 993 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 22. 允许 POP3 和 POP3S</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -A INPUT -i eth0 -p tcp --dport 110 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 110 -m state --state ESTABLISHED -j ACCEPT #iptables -A INPUT -i eth0 -p tcp --dport 995 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 995 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 1234 </td> <td class="crayon-code"><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp --dport 110 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 110 -m state --state ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp --dport 995 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 995 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 23. 防止 DoS 攻击</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -A INPUT -p tcp --dport 80 -m limit --limit 25/minute --limit-burst 100 -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 1 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">p</span><span class="crayon-h"> </span><span class="crayon-v">tcp</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">dport</span><span class="crayon-h"> </span><span class="crayon-cn">80</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">limit</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">limit</span><span class="crayon-h"> </span><span class="crayon-cn">25</span><span class="crayon-o">/</span><span class="crayon-v">minute</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">limit</span><span class="crayon-o">-</span><span class="crayon-i">burst</span><span class="crayon-h"> </span><span class="crayon-cn">100</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">ACCEPT</span></td> </tr> </tbody></table> <h3># 24. 设置 422 端口转发到 22 端口</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">#iptables -t nat -A PREROUTING -p tcp -d 192.168.102.37 --dport 422 -j DNAT --to 192.168.102.37:22 #iptables -A INPUT -i eth0 -p tcp --dport 422 -m state --state NEW,ESTABLISHED -j ACCEPT #iptables -A OUTPUT -o eth0 -p tcp --sport 422 -m state --state ESTABLISHED -j ACCEPT</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 123 </td> <td class="crayon-code"><span class="crayon-p">#iptables -t nat -A PREROUTING -p tcp -d 192.168.102.37 --dport 422 -j DNAT --to 192.168.102.37:22</span><span class="crayon-p">#iptables -A INPUT -i eth0 -p tcp --dport 422 -m state --state NEW,ESTABLISHED -j ACCEPT</span><span class="crayon-p">#iptables -A OUTPUT -o eth0 -p tcp --sport 422 -m state --state ESTABLISHED -j ACCEPT</span></td> </tr> </tbody></table> <h3># 25. 为丢弃的包做日志(Log)</h3> <span class="crayon-title"></span> <textarea class="crayon-plain print-no">iptables -N LOGGING iptables -A INPUT -j LOGGING iptables -A LOGGING -m limit --limit 2/min -j LOG --log-prefix "IPTables Packet Dropped: " --log-level 7 iptables -A LOGGING -j DROP</code></pre> <table class="crayon-table"> <tbody><tr class="crayon-row"> <td class="crayon-nums "> 1234 </td> <td class="crayon-code"><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">N</span><span class="crayon-h"> </span><span class="crayon-e">LOGGING</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">INPUT</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-e">LOGGING</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">LOGGING</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">m</span><span class="crayon-h"> </span><span class="crayon-v">limit</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-i">limit</span><span class="crayon-h"> </span><span class="crayon-cn">2</span><span class="crayon-o">/</span><span class="crayon-v">min</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">LOG</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">log</span><span class="crayon-o">-</span><span class="crayon-i">prefix</span><span class="crayon-h"> </span><span class="crayon-s">"IPTables Packet Dropped: "</span><span class="crayon-h"> </span><span class="crayon-o">--</span><span class="crayon-v">log</span><span class="crayon-o">-</span><span class="crayon-i">level</span><span class="crayon-h"> </span><span class="crayon-cn">7</span><span class="crayon-v">iptables</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">A</span><span class="crayon-h"> </span><span class="crayon-v">LOGGING</span><span class="crayon-h"> </span><span class="crayon-o">-</span><span class="crayon-i">j</span><span class="crayon-h"> </span><span class="crayon-v">DROP</span></td> </tr> </tbody></table> <span class=" btn-bluet-bigger href-style vote-post-up register-user-only "><i class="fa fa-thumbs-o-up"></i> <h10>2</h10><span class="modify"> 赞</span></span> <span class=" btn-bluet-bigger href-style bookmark-btn register-user-only "><i class="fa fa-bookmark-o "></i><span class="modify"> 7 收藏</span></span> <span class="btn-bluet-bigger href-style hide-on-480"><i class="fa fa-comments-o"></i><span class="modify"> 2 评论</span></span> <h3 class="widget-title"> </h3>
来源: http://blog.jobbole.com/108468/
与本文相关文章
Linux 常用命令 (common commands for linux)
Linux常用命令(一)
linux 常用命令 3
linux防火墙的语法规则,以及常用防火墙命令的意思
Emacs 25.3 发布,Linux 文本编辑器
linux 网络相关, iptables 语法
linux常用操作
Linux 防火墙iptables 实例
暂无,快来抢沙发吧!
更多
提交
验证码:
{uname}
{body}
最佳答案
{$v.body}
{fun date('Y-m-d',$v.time)}