剛剛發現奇怪的現象，晚點來問問看好了... 手上的 test-priceclass100.gslin.org 設定為 Only Use US and Europe：
但在 SmokePing 上卻看到極低的 latency 而覺得納悶：
動手查了一些資料發現是被導到台灣的點... 可以看到先問 168.95.192.1 (HiNet 光世代預設的 DNS) 後得到了這些 IP：
gslin@GSLIN-HOME1404 [~] [02:43/W4] dig test-priceclass100.gslin.org @168.95.192.1 ; <<>> DiG 9.9.5-3ubuntu0.5-Ubuntu <<>> test-priceclass100.gslin.org @168.95.192.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48453 ;; flags: qr rd ra; QUERY: 1, ANSWER: 9, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 3072 ;; QUESTION SECTION: ;test-priceclass100.gslin.org. IN A ;; ANSWER SECTION: test-priceclass100.gslin.org. 300 IN CNAME d265g70k07is7o.cloudfront.net. d265g70k07is7o.cloudfront.net. 60 IN A 54.192.215.203 d265g70k07is7o.cloudfront.net. 60 IN A 54.192.215.98 d265g70k07is7o.cloudfront.net. 60 IN A 54.239.176.96 d265g70k07is7o.cloudfront.net. 60 IN A 54.192.214.40 d265g70k07is7o.cloudfront.net. 60 IN A 54.239.176.216 d265g70k07is7o.cloudfront.net. 60 IN A 54.192.212.118 d265g70k07is7o.cloudfront.net. 60 IN A 54.239.176.223 d265g70k07is7o.cloudfront.net. 60 IN A 54.239.176.56 ;; Query time: 178 msec ;; SERVER: 168.95.192.1#53(168.95.192.1) ;; WHEN: Thu Oct 22 02:43:24 CST 2015 ;; MSG SIZE rcvd: 228
接下來跑 mtr 看，發現是台灣的節點：
gslin@GSLIN-HOME1404 [~] [02:43/W4] mtr --report -n 54.239.176.56 Start: Thu Oct 22 02:43:37 2015 HOST: GSLIN-HOME1404 Loss% Snt Last Avg Best Wrst StDev 1.|-- 168.95.98.254 0.0% 10 8.6 9.1 8.4 9.9 0.3 2.|-- 168.95.25.50 0.0% 10 8.1 9.0 8.0 9.9 0.3 3.|-- 220.128.11.226 0.0% 10 9.3 11.8 8.1 31.7 7.1 4.|-- 220.128.5.94 0.0% 10 12.9 13.9 9.6 17.9 2.9 5.|-- 220.128.4.177 0.0% 10 8.7 13.1 8.7 35.3 8.0 6.|-- 203.75.228.29 0.0% 10 9.9 10.1 9.3 10.9 0.3 7.|-- 223.26.65.19 0.0% 10 9.4 10.3 9.4 11.4 0.3 8.|-- 202.133.255.122 0.0% 10 11.0 10.8 9.5 13.5 1.0 9.|-- 54.239.176.56 0.0% 10 10.7 9.4 8.4 10.7 0.7
這是哪招呢...