Using Voip With Vpn

One of the most recent trends regarding VoIP is the application of VPN systems for various purposes

. Though VPNs have been traditionally used for data applications, their use in VoIP systems is an easy transition since all voice can be routed through the network as data. Let's take a look at two major reasons why you may want to use a VPN service with VoIP.

Security

VoIP security is a huge concern for corporations and individuals alike. Just like traditional data networks are susceptible to various types of attacks, Voiceover IP networks can also be hacked. "Man in the middle" attacks are a concern and so is a hacker accessing the gateway to make free calls. VPN solves these issues by connecting to a secure server using encryption so such attacks are impossible or useless to try.

Another related reason is that many ISPs and countries block VoIP services. If you need to go ahead and make calls over the Internet, you need a snoop proof way to transfer the data and a VPN is just what you need.

Firewall Access

One odd reason why you might want to go the VPN route is to ensure that your traffic isn't filtered by Firewalls. The SIP protocol is notorious for using random ports and your security system may detect this to be a threat. Using a VPN means that your VoIP traffic is sent to an outside server which then routes the call over the Internet for you.

The problem with using a VPN in this manner however is that it can significantly add to the bloat of your Internet connection. This is because each packet needs to be layered over with encryption. It's possible that your Internet connection can't keep up with this sort of heavy duty work, so that's certainly something to consider.

Recent developments in VoIP and VPN technology have attempted to use specialized protocols with VoIP which encapsulate the encryption layer into the protocol itself. This has the effect of doing away with the added bulk. The usual problems of compatibility and interoperability come into play whenever we talk about a new protocol though.

One can also use a VPN selectively - meaning that you can choose to encrypt only certain paths like say between two areas of your business. It depends on your business and how it works. Contact a professional and find out how you can use a VPN network to enhance your VoIP system.

by: Andrew Wiggin

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