Abstract: Unlike major overseas portals such as Google, South Korea's major portals such as Naver and Daum have been arranging news contents in an In-Link method. As a result, users have been manipulating comments with multiple IDs and macros (mechanical ways). Therefore, it can be seen that there is a correlation between the policy of the portal and the comment by the user. In order for internet portals to fulfill their social and legal responsibilities, countermeasures at the national level and organizational measures within the portal should be prepared. We analyze the internet comment manipulation case and analyze the correlation between the portal policy such as sorting method and the manipulation by the user.