Codemasters have announced that they have implemented an IP blocking system which will block access to Archlord and RF Online for players in countries not covered by Codemasters.

As part of our on-going commitment to protecting legitimate players, we have now implemented an IP blocking system that prevents players from territories that are not supported by Codemasters from accessing the RF Online and ArchLord games.
Whilst this implementation shouldn't affect bona fide players, there is a small chance that some will be blocked. If you believe you have been blocked in error, please fill out an appeal via our online form at this URL:

http://www.codemasters.co.uk/support/appeals.php

The countries/territories that are not supported and hence affected are: Brunei, Cambodia, Canada, China, Hong Kong, India, Indonesia, Japan, Malaysia, Myanmar, Pakistan, Philippines, Republic of Korea, Republic of Lao, Singapore, Taiwan, Thailand, Vietnam.

Read more here.