sunp.eu.org 一级域最近经常打不开

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sunp.eu.org resolve 对应 2个 ip
23.251.96.131 (异常)
23.251.100.132 (ok)
这样浏览器经常间歇性访问不了.

其中 23.251.96.131 是无法正常访问的, 随便找了个站长工具测了下

国内部分区域「集中在联通」无响应

起初怀疑是 gfw 的问题, 但是去到 linode tokyo 发现可以 ping 通, 但是 nmap 了一下, 发现 80 端口竟然不通
➜ ~ nmap 23.251.96.131
Starting Nmap 6.40 ( http://nmap.org ) at 2014-11-27 13:34 CST
Nmap scan report for 23.251.96.131
Host is up (0.11s latency).
Not shown: 995 filtered ports
PORT STATE SERVICE
22/tcp open ssh
53/tcp closed domain
161/tcp closed snmp
443/tcp open https
6789/tcp open ibm-db2-admin

后来又试了下 23.251.100.131 「把 (ok) ip 的尾号 d 段改成 131」, 竟然可以访问
➜ ~ curl -s http://sunp.eu.org -x 23.251.100.132:80 | head
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="zh-CN">
<head>
<meta charset="UTF-8" />
<meta content="True" name="HandheldFriendly" />

<meta name="detectify-verification" content="d0264f228155c7a1f72c3d91c17ce8fb" />
<meta name="alexaVerifyID" content="OFc8dmwZo7ttU4UCnDh1rKDtLlY" />
<meta name="baidu-site-verification" content="D00WizvYyr" />
<meta name="msvalidate.01" content="D9B08FEA08E3DA402BF07ABAB61D77DE" />

@Livid 难道是 ip 写错了?

meta

content=

name=

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