crosspost from http://rextang.net/blogs/work/
I had my broadband connection at Tokyo about 2 months ago. it’s a VDSL link with 100Mbps speed FTTH. it’s really fast considering the dual 100M speed.
but actually the web browsing responses is not as perfect as imagine. most of the time most of the links will just be broken. I am started to wondering if there is anything wrong with my DNS settings.
looking into the manual and OCN website, there were nothing talking about DNS settings. by default setting, when one got OCN B-Flets router, just use router’s local ip address as DNS server and gateway address. but I did find that the router’s DNS server function is not so stable (or I might set something wrong!?). I did need to setup the router to open several filter ports also port mappings, and define my own DHCP segments, means I didn’t use the default settings by the router. As the router DNS is functioning not so well until now, I decided to have a check about all the settings.
First of all, I need to know where the official OCN Network’s primary and secondary DNS servers are. unfortunately there is no data on OCN website. so back to the root, using “nslookup” to find out:
Default Server: 192.168.1.1
> set q=ns
ocn.ad.jp nameserver = pns.ocn.ad.jp
ocn.ad.jp nameserver = ns-os001.ocn.ad.jp
pns.ocn.ad.jp internet address = 18.104.22.168
ns-os001.ocn.ad.jp internet address = 22.214.171.124
I supposed “pns.ocn.ad.jp (126.96.36.199)” is primary DNS server and “ns-os001.ocn.ad.jp (188.8.131.52)” is the secondary DNS server.
In router’s LAN settings there are places for input LAN DNS server addresses. it was left blank and I decide to fill in those 2 DNS servers.
For my own home server’s DNS service (Windows 2003 Server R2), I decided to add those ISP’s dns servers to forwarder settings in order to get more faster responses.
by setting those and reset my router, I do experienced a faster and stable responses on web browsing experiences. therefore, FYI if you are in Tokyo and also using OCN B-Flets FTTH broadband network.