Originally Posted by
Scifience
L2TP/IPsec is the best choice. It's the biggest pain to set up and configure, particularly for the server admins. The Net Nannies won't dare implement a blanket ban on IPsec VPNs, as these are what's used by almost all major corporations. Unfortunately, most commercial VPN providers don't offer IPsec...a handful of the most expensive providers do (PM if you want some names that are tested working here in SH), but using your company's is the best bet.
This depends on the ISP. I tried connecting to an IPsec VPN with Unicom and it doesn't work, but it works fine on Telecom.