"If your company has people on the road, such as sales or
technical people, a VPN is a good method for letting them access
data on the company network. Many different VPN solutions can be
bought, but many are free. Here, I discuss only solutions you can
set up without buying a commercial VPN product.
"The main VPN solution used for more complex tasks is IPsec;
some people use PPTP. Although PPTP is usable, security flaws have
occurred in its past, and it simply does not match up to