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漏洞如下

1、ICMP漏洞修复

firewall-cmd --permanent --direct --add-rule ipv4 filter INPUT 0 -p ICMP --icmp-type timestamp-request -m comment --comment "deny ICMP timestamp" -j DROP

2、允许Traceroute探测 漏洞修复

firewall-cmd --permanent --direct --add-rule ipv4 filter INPUT 0 -p ICMP --icmp-type 11 -m comment --comment "deny traceroute" -j DROP

防火墙命令生效

firewall-cmd --reload

查看添加的规则

firewall-cmd --direct --get-all-rules

iptables修复

sudo iptables -A INPUT -p ICMP --icmp-type timestamp-request -j DROP
sudo iptables -A INPUT -p ICMP --icmp-type timestamp-reply -j DROP
sudo iptables -A INPUT -p ICMP --icmp-type time-exceeded -j DROP
sudo iptables -A OUTPUT -p ICMP --icmp-type time-exceeded -j DROP
 
systemctl enable iptables.service

执行以上如提示:Failed to execute operation: No such file or directory
需执行:yum install iptables-services

移除添加的规则

firewall-cmd --permanent --direct --remove-rule ipv4 filter INPUT 0 -p ICMP --icmp-type timestamp-request -m comment --comment "deny ICMP timestamp" -j DROP
firewall-cmd --permanent --direct --remove-rule ipv4 filter INPUT 0 -p ICMP --icmp-type 11 -m comment --comment "deny traceroute" -j DROP

本文标签: 漏洞CENTOSICMPtraceroute