Cisco SSL VPN

http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6657/product_data_sheet0900aecd80405e25.html

http://www.cisco.com/en/US/partner/products/ps6496/products_configuration_example09186a0080720346.shtml

http://www.cisco.com/en/US/partner/products/ps5855/products_configuration_example09186a0080af314a.shtml

http://www.cisco.com/en/US/docs/net_mgmt/cisco_configuration_professional/guides/CiscoCPqsg.html

http://www.cisco.com/en/US/partner/products/ps6496/products_configuration_example09186a008072aa61.shtml