The security of an ordinary fence can be improved by using intersecting inserts that extend between posts of the fence. The inserts can be inserted in channels that are formed by the woven wire of the fence fabric. Intersections of the inserts can be used to securely couple two intersecting inserts to each other by any suitable means such as welding, bolting, riveting, gluing, and the like. The inserts can be securely coupled to the posts either directly (for example, by using a bracket attached to a post) and/or indirectly by using, for example, a tensioning rod that is coupled to a post. The inserts can also be securely coupled to a support rail that spans the distance between two posts.