fedora中iptables与firewall的关系
妙音
posted @ 2014年3月13日 16:09
in linux
with tags
防火墙;firewall;iptables
, 5494 阅读
fedora上有两个防火墙iptables和firewall.
它们间的关系
iptables用于过滤数据包，属于网络层防火墙.
firewall能够允许哪些服务可用，那些端口可用.... 属于更高一层的防火墙。
firewall的底层是使用iptables进行数据过滤，建立在iptables之上。
默认的iptables配置
[wyq@localhost ~]$ sudo iptables -L -n Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination
firewall启动后，查看iptables的配置
可以看到，firewall修改了iptables中链路
[wyq@localhost sysconfig]$ sudo iptables -L -n Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 INPUT_direct all -- 0.0.0.0/0 0.0.0.0/0 INPUT_ZONES_SOURCE all -- 0.0.0.0/0 0.0.0.0/0 INPUT_ZONES all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED ...........
firewall可以提供高层的防火墙。
所以fedora系统中的设置防火墙，最好使用firewall
2014年3月13日 21:39
「在设置iptables后需要重启iptables」？难道你们在服务状态都不直接用 iptables 命令改而是通过另外的管理工具么？
2014年3月17日 09:26
谢谢@依云:
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