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iptables-restore 正在创建危险规则

tag-icon • tag-icon iptables
iptables-restore 正在创建危险规则

我有这个定义文件：

*filter

:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
:Firewall-INPUT - [0:0]
-A INPUT -j Firewall-INPUT
-A FORWARD -j Firewall-INPUT
-A Firewall-INPUT -i lo -j ACCEPT
-A Firewall-INPUT -p icmp --icmp-type echo-reply -j ACCEPT
-A Firewall-INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT
-A Firewall-INPUT -p icmp --icmp-type time-exceeded -j ACCEPT

# Ping
-A Firewall-INPUT -p icmp --icmp-type echo-request -j ACCEPT

# Accept any established connections
-A Firewall-INPUT -m conntrack --ctstate  ESTABLISHED,RELATED -j ACCEPT

# Enable the traffic between the nodes of the cluster
-A Firewall-INPUT -s 10.0.1.1 -j ACCEPT

# Allow connections from docker container
-A Firewall-INPUT -i docker0 -j ACCEPT

# Accept ssh, http, https and git
-A Firewall-INPUT -m conntrack --ctstate NEW -m multiport -p tcp --dports 22,2222,80,443 -j ACCEPT

# Log and drop everything else
-A Firewall-INPUT -j LOG
-A Firewall-INPUT -j REJECT --reject-with icmp-host-prohibited

COMMIT

然后我iptables-restore根据以下规则调用：

/sbin/iptables-restore < /tmp/iptables-rules-save

之后，我运行iptables -L并得到以下结果：

Chain INPUT (policy DROP)
target     prot opt source               destination
Firewall-INPUT  all  --  anywhere             anywhere

Chain FORWARD (policy DROP)
target     prot opt source               destination
Firewall-INPUT  all  --  anywhere             anywhere

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain Firewall-INPUT (2 references)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     icmp --  anywhere             anywhere            icmp echo-reply
ACCEPT     icmp --  anywhere             anywhere            icmp destination-unreachable
ACCEPT     icmp --  anywhere             anywhere            icmp time-exceeded
ACCEPT     icmp --  anywhere             anywhere            icmp echo-request
ACCEPT     all  --  anywhere             anywhere            ctstate RELATED,ESTABLISHED
ACCEPT     all  --  10.0.1.1             anywhere
ACCEPT     all  --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere            ctstate NEW multiport dports ssh,EtherNet/IP-1,http,https
LOG        all  --  anywhere             anywhere            LOG level warning
REJECT     all  --  anywhere             anywhere            reject-with icmp-host-prohibited

如您所见，它添加了一条危险的规则，即接受从任何来源到服务器上的任何接口的所有数据包。

我的设置有什么问题导致这种情况？如何修复？

P/S：我在 Digital Ocean CentOS 6.5 droplet 上运行了这个程序

答案1

的默认输出iptables -L不显示接口，因此不会显示确切的规则。尝试运行iptables -L -v以将接口包含在输出中 - 该destination列是网络地址，而不是接口。输出-v将显示您创建的确切规则。

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