【icmp】ping ok，curl/telnet 访问 ip

如果ping ip能通,但是curl/telnet 访问 ip+port 报not route to host 错误,你会怎么查？

iptables 从入门到应用
https://www.cnblogs.com/reaperhero/category/1427210.html

网络错误定位案例 ICMP host *** unreachable - admin prohibited
https://www.cnblogs.com/sammyliu/p/4981194.html

cni flannel
iptables -t filter -D FORWARD -j REJECT --reject-with icmp-host-prohibited
https://www.cnblogs.com/dream397/p/15250743.html

朱双印 iptables 教程
https://www.zsythink.net/archives/category/%E8%BF%90%E7%BB%B4%E7%9B%B8%E5%85%B3/iptables

运维知识体系
https://www.cnblogs.com/reaperhero/p/10293318.html