Oooh ok, I know the reason now, reason: Update services.
http://codex.ww.wp.xz.cn/Update_Services
I think that IP is my local ISP’s gateway.
I installed ZoneAlarm personal firewall recently, running wordpress 2.0 as localhost diary (its only on my PC nowhere else).
Everytime I submit a post or edit it, ZoneAlarm tells me my php-cgi.exe wants to go to a destination IP ourside my LAN to 202.183.81.6:DNS, there are a few destinations it seems.
If I disallow it, I get a blank page on the admin, but my post did get saved if I view my local blog … whats going on??