Comments From Overseas in WordPress Blogs

Comments allow your website’s visitors to have a discussion with you and each other. When you activate comments on a page or post, WordPress inserts several text boxes after your content where users can submit their comments. Once you approve a comment, it appears underneath your content. 
But comments from outside of your country needs a special setting.
For me I did a little change to my web server, but I think there are must other options to achive this. I am looking forward to hear your advice.