Information security course for undergraduate students is a growing activity in many universities and colleges. One of the primary questions that all instructors face is how to draw student into active learning process. In this paper, we share our experiences on the practice of interactive teaching in an information security course. The three major methods, seminar-style teaching in classroom, topic presentations and discussions, and course projects for promoting hands-on learning are described. The positive results in terms of successful learning have been witnessed on the course evaluation and the feedback from the students. Furthermore, some concerns in using these methods are also discussed in the paper.