DDNS update for wretar.dthink.net on sfdns1e2 failed

[zma]

From HKBN network in HK:

[root@ddnsUpdater0e0 dns_updater]# ./update_dns.sh
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 14 100 14 0 0 41 0 --:--:-- --:--:-- --:--:-- 81
; Communication with 115.231.209.243#53 failed: timed out
could not talk to specified name server
[Mon Sep 14 14:12:07 HKT 2015] Adding failed

The dns_file:

[root@ddnsUpdater0e0 dns_updater]# cat dns_file
server 115.231.209.243
update add wretar.dthink.net 600 A 61.92.242.11
send