防火墙-cmd拒绝目标地址

Question

我用的是：

# cat /etc/redhat-release 
CentOS Linux release 7.1.1503 (Core) 
# rpm -q firewalld
firewalld-0.3.9-11.el7.noarch
#

我试图阻止特定IP地址(10.52.208.220)从我的系统到达它，但无法这样做：

在此之前：

# firewall-cmd --reload
success
# firewall-cmd --list-all
public (default, active)
  interfaces: eno1
  sources: 
  services: dhcpv6-client high-availability http https ssh
  ports: 5666/tcp 3306/tcp 5900/tcp 9001/tcp
  masquerade: no
  forward-ports: 
  icmp-blocks: 
  rich rules: 

# ping -c1 wcmisdlin01
PING wcmisdlin01.uftmasterad.org (10.52.208.220) 56(84) bytes of data.
64 bytes from wcmisdlin01.uftmasterad.org (10.52.208.220): icmp_seq=1 ttl=64 time=0.379 ms

--- wcmisdlin01.uftmasterad.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.379/0.379/0.379/0.000 ms
#

之后：

# firewall-cmd --add-rich-rule='rule family="ipv4" destination address="10.52.208.220" protocol value="icmp" reject'
success
# firewall-cmd --list-all
public (default, active)
  interfaces: eno1
  sources: 
  services: dhcpv6-client high-availability http https ssh
  ports: 5666/tcp 3306/tcp 5900/tcp 9001/tcp
  masquerade: no
  forward-ports: 
  icmp-blocks: 
  rich rules: 
    rule family="ipv4" destination address="10.52.208.220" protocol value="icmp" reject

# ping -c1 wcmisdlin01
PING wcmisdlin01.uftmasterad.org (10.52.208.220) 56(84) bytes of data.
64 bytes from wcmisdlin01.uftmasterad.org (10.52.208.220): icmp_seq=1 ttl=64 time=0.266 ms

--- wcmisdlin01.uftmasterad.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.266/0.266/0.266/0.000 ms
# 

IPTABLES(8) - iptables/ip6tables — administration tool for IPv4/IPv6 packet filtering and NAT

# iptables --list IN_public_deny
Chain IN_public_deny (1 references)
target     prot opt source               destination         
REJECT     icmp --  anywhere             wcmisdlin01.uftmasterad.org  ctstate NEW reject-with icmp-port-unreachable
# 

我做错了什么？

Answer 1

在检查整个iptables -n --list输出时，(最终)从INPUT链调用IN_public_deny，这与从系统发送到如此不可否认的主机的数据包无关；相反，这些数据包将通过OUTPUT链路由(如果防火墙是源和目的地之间的路由器或桥梁，则可能是FORWARD )。firewalld.richlanguage(5)似乎没有提供任何方法来指定规则必须进入OUTPUT (或FORWARD)链，因此直接规则的“最后”选项似乎是一种解决方案。

firewall-cmd --direct --add-rule ipv4 filter OUTPUT_direct 0 -p icmp -d 10.52.208.220 -j REJECT --reject-with icmp-host-prohibited

(虽然我通常更喜欢放弃(可能是以速率限制的方式登录)而不是发送ICMP拒绝，就好像即将被阻塞的主机正在发疯一样，将ICMP响应数据包扔回有负担的网络可能会使事情变得越来越糟……)