更新CentOS防火墻設(shè)置開(kāi)啟80端口訪問(wèn)

我們以添加80端口為例操作如下：

[root@centos httpd]# /sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT

保存

[root@centos httpd]# /etc/rc.d/init.d/iptables save

iptables：將防火墻規(guī)則保存到 /etc/sysconfig/iptables： [確定]

如果上面的步驟還沒(méi)好的話，可能是這個(gè)iptables文件使用的是包含調(diào)用。

一般的在/etc/sysconfig/iptables這個(gè)路徑上

或者使用vi打開(kāi)這個(gè)文件修改手動(dòng)添加

[root@centos httpd]# vi /etc/sysconfig/iptables

# Generated by iptables-save v1.4.7 on Tue Feb 14 07:32:18 2012
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [7:640]
-A INPUT -p tcp -m tcp --dport 10000 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Tue Feb 14 07:32:18 2012

重新啟動(dòng)服務(wù)

[root@centos httpd]# service iptables restart
iptables：清除防火墻規(guī)則： [確定]
iptables：將鏈設(shè)置為政策 ACCEPT：filter [確定]
iptables：正在卸載模塊： [確定]
iptables：應(yīng)用防火墻規(guī)則： [確定]

查看端口是否生效:

[root@centos httpd]# /etc/init.d/iptables status

表格：filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:10000
2 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,
4 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
5 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp
7 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with ic

Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with ic

Chain OUTPUT (policy ACCEPT)
num target prot opt source destination