School was hit by the MyTob worm this week. We plugged the hole with tighter restrictions on SMTP traffic within our network, but the successful infection underscores a larger problem with networks on the whole. Schools and other institutions typically protect their networks with firewall, antivirus software, and spam filters. This kind of worm defies all three of these in the typical network, because it only takes one infected laptop carried onto campus to bypass these server-based, externally-focused defenses. In a mobile world, we need to focus more attention on protective measures for internal traffic. Unfortunately, this creates more work to implement these measures and deal with restrictions on legitimate uses that will undoubtedly arise.
Category: Server |