Information Security Education Journal Narit Hnoohom, Mahasak Ketcham 5 2 2018 10.6025/isej/2018/5/2/49-62 http://www.dline.info/isej/fulltext/v5n2/isejv5n2_2.pdf This paper proposed the use of the Intrusion Prevention Systems (IPS) technique to prohibit network intrusion as well as test its performance in internal attacks. The performance analysis of the network intrusion prevention system via Internet Protocol Television (IPTV) focused on the prevention of Denial of Service (DoS) attacks, which aim to destroy the host computer that is available to users. Snort was also applied for use in IPTV. From the experimental results, the IPS of TCP protocol attacked over a wired network by using Multicast IP Address displayed the most effective results by detecting up to 39,389 attack packets. Therefore, the IPS can be applied effectively to reduce, delay and prevent network intrusions.