VoIP with VPN

Virtual private network (VPN) can be used to VoIP (voice over Internet Protocol) traffic to deliver.

Why choose this method of transport, is to increase the security, or to circumvent the problems of the firewall or router with VoIP calls. It is an attractive solution for more users instead of individuals.

Security benefits

Occurs between capturing sounds and he pipe line VPN encryption.

Standard encryption for VPN, IPSec (Internet Protocol security) is used to encode the data.

Firewall problems

Most VoIP programs use the SIP (Session Initiation Protocol) Protocol to establish connections.

SIP-works with firewalls or routers. This is because respect Protocol to a specified port and destination selects a port on the computer randomly. Firewalls a specific port cannot be configured on the incoming. This method is used to designate a standard port for the VoIP traffic. SIP can be restricted but not in this way. Therefore the enclosing the VoIP call to a virtual private network includes procedures for SIP addressing.

Developments

Using IPSec to encrypt caused much overhead on packets, it slows down the rate of application data.

SSL (Secure Socket Layer) has been used secure Web sites - how to take the details of the credit card transactions. This layer on VoIP VPN allows applied to reduce the overhead transmission standard encryption.