防火墙里开放 ping

[Platinum]

以前图省事直接开放了 all ICMP，今天调防火墙时是顺便看到，有很多种

如果只想允许 ping 的话，打开 Echo Reply / Echo Request 这两个就够了

这个是下拉菜单里全部的，很明显大部分对个人而言都没什么意义

Echo Reply
Destination Unreachable
Source Quench
Redirect Message
Alternate Host Address
Echo Request
Router Advertisement
Router Solicitation
Time Exceeded
Parameter Problem: Bad IP header
Timestamp
Timestamp Reply
Information Request
Information Reply
Address Mask Request
Address Mask Reply
Traceroute
Datagram Conversion Error
Mobile Host Redirect
Where Are You
Here I Am
Mobile Registration Request
Mobile Registration Reply
Domain Name Request
Domain Name Reply
SKIP Algorithm Discovery Protocol
Photuris, Security Failures

另外，东京 aws / linode 之间互相 ping 才 10ms，真是哥俩好啊 -_-