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Guide to VPNs

unhappyghost
Jul 23rd, 2013
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  1. Guide to VPNs
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  3.  
  4. ‪#‎VPNs‬ (‪#‎virtual_private_networks‬) aim to provide ‪#‎secure_communications‬ within distributed enterprises, among business partners, and between mobile workers and corporate IT resources.
  5.  
  6. VPNs make use of the public Internet, and for that reason, advocates view the technology as more cost-effective than ‪#‎dial_up_networking‬ — with its attendant phone-line costs — and dedicated WANs. To secure the VPN, an organization generally installs some form of gateway, a network device that manages a VPN’s connections. A ‪#‎gateway‬ may consist of ‪#‎VPN_Software‬ installed on a server or a specialized ‪#‎VPN_appliance‬.
  7.  
  8. VPN functionality may also be embedded in ‪#‎firewalls‬ or offered in a security appliance such as a ‪#‎UTM‬ (‪#‎Unified_Threat_Management‬) device. Such devices may include firewall, ‪#‎IDS‬ (‪#‎Intrusion_Detection_System‬) an ‪#‎IPS‬ (‪#‎Intrusion_Prevention_System‬) capabilities in addition to VPN.
  9.  
  10. Organizations may manage their VPN gateways in house or opt to assign that duty to a third-party entity known as a managed-security-services provider. Numerous managed-security-services providers will maintain VPNs, as well as other types of customer-premise equipment including firewalls, IDSes and IPSes.
  11.  
  12. How VPNs Work
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  14. VPNs are designed to establish secure communications channels through public networks such as the Internet. How they do this differs according to the type of ‪#‎security_protocol‬ that is employed.
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  16. ‪#‎IPsec‬ VPNs create a protected tunnel between two points. Such ‪#‎point_to_point_VPNs‬ could, for example, link a corporate headquarters with a branch office. IPsec VPNs may also play a role in remote access as a means for letting telecommuters access corporate networks.
  17.  
  18. IPsec provides ‪#‎authentication‬ and other security services. The security protocol is often used in conjunction with ‪#‎3DES‬ ‪#‎encryption‬ when it comes to VPN products.
  19.  
  20. With IPsec VPNs, organizations must install client software on devices that need network access. The ‪#‎VPN_client‬ permits the tunnel to be created between a ‪#‎remote_computer‬ and a ‪#‎corporate_network‬.
  21.  
  22. Although IPsec has a longer history, VPNs based on the ‪#‎SSL‬ (‪#‎Secure_Sockets_Layer‬) protocol have seen increasing adoption in recent years. SSL encryption is widely used to secure data transmitted via the Internet, so it reduces the need for client software. SSL VPNs permit users to access resources with any ‪#‎Web_browser‬ that supports SSL.
  23.  
  24. This lack of a VPN client eases administration, as software doesn’t have to be loaded and periodically updated on every device that needs access to the network. That said, some SSL VPN deployments may call for the use of client software to handle applications that don’t use ‪#‎port_80‬.
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  26. SSL VPNs are mainly used for remote access, whereas IPsec VPNs often play a role in LAN-to-LAN links.
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  28. VPN Benefits
  29. ----------------
  30. A key point of distinction for VPNs is their use of the existing Internet infrastructure and the associated cost advantages. VPNs serve as a means of secure communication for distributed organizations, and they have grown to accommodate mobile users and a host of access devices.
  31.  
  32. VPNs may also enable continuity-of-operations plans, as the technology lets workers access enterprise applications from home or other locations if their usual workplaces are closed due to an emergency.
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  34. VPN Costs
  35. -----------
  36. Small-business-oriented, entry-level VPN appliances generally cost in the $500 to $1,000 range. Enterprise-class appliances typically start around $10,000 and may cost in excess of $30,000.
  37.  
  38. Buyers opting for VPN technology via a UTM device can expect to pay $700 to $800 for a low-end, small-business-oriented solution and $10,000 and up for an enterprise UTM solution.
  39.  
  40. Other Points to Consider
  41. --------------------------
  42. VPN technology is reasonably mature, with the major recent developments focused on increased manageability. One technology development, however, involves ‪#‎MOBIKE‬ (‪#‎IKE‬ v2 Mobility and ‪#‎Multihoming‬ Protocol). MOBIKE, which builds upon the IKEv2 key-management protocol, intends to let users maintain secure VPN connections as they move from network to network
  43. #UnhappyGhost
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  45. .
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  47. ##############################################################
  48. # ṲИℋÅℙℙУḠ♓☮$✝ #
  49. ##############################################################
  50. || Website --------> http://unhappyghost.com/ ||
  51. || Facebook -------> https://www.facebook.com/unhappygh0st ||
  52. || FB Page --------> https://www.facebook.com/geeksch00l ||
  53. || Twitter --------> https://twitter.com/unhappygh0st ||
  54. || Google+ --------> http://goo.gl/WCHeJR ||
  55. || Youtube --------> http://goo.gl/A3mQIE ||
  56. || IPv6 Vids ------> http://goo.gl/Rbcxk ||
  57. || IPv6 Event -----> http://goo.gl/TaeXv ||
  58. ##############################################################
  59.  
  60. .
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