Virtual Private Networks (VPNs) are becoming mandatory aspects of companies' critical infrastructure. Mobile users rely on the capability of having office resources available anywhere. Regulatory requirements (such as those from PCI, HIPPA, etc) require that transmissions of data to vendors or third parties are encrypted, typically requiring a VPN tunnel to securely handle your data.
"SSL VPNs are the best choice for connecting external partners (customers, suppliers) or sporadic users" (source: Gartner).
"Traditional IPsec solutions are often too complex to manage, especially for a large number of users" (source: Quocirca).
Product Specification
Praetorian Security Group Managed Security Services Specification