This article surveys the approach of Orthodox Judaism – especially the Haredi (Ultra-Orthodox) Judaism – to the Internet. In the introduction we compare the approach of the Abrahamic religions to the Internet. Then we focus on the Haredi community (especially in the contemporary State of Israel) and their specific approach to the Internet. This article argues that the use of the Internet, although officially banned by many Haredi Rabbis, is in fact tolerated on a pragmatic basis. We also survey which kind of “protection against secular threads” the Haredim use (filtering software, Holy Shabbat protection). In the last part of this article the role of the Internet in Israeli religious politics, and by its uses by fundamentalist and radical Jewish groups, is surveyed.