It　is　currently　a　global　hotspot　that　the　application　of　multimedia　and　network　technology　to　education　is　coming　to　be.　There　are　inevitably　threats　brought　about　by　the　reliance　on　network　and　security　problems　of　different　levels　in　the　modern　web-based　distance　education　system.　This　paper　gives　introduction　to　and　analysis　on　the　building　of　network　security　mechanisms　in　detail　for　distance　education　system　in　three　aspects,　including　the　selection　of　the　user　authentication,　VPN　selection　of　remote　communication　supporting,　and　the　server-side　performance　guarantees.　Then　a　detailed　solution　is　made.　©2010　IEEE.