OK, I’ve settled on VPN, and I need your help once again. My small (10 users) network accesses the Internet through a 1 Mbps DSL line and Microsoft’s Proxy Server. Where do I go from here? What kind of mistakes am I likely to make? Help me avoid thepitfalls and get my VPN running smoothly, securely, and as quickly as possible. The best suggestions (and confessions, if you’ve learned the hard way) will appear in my next column.