You may have heard of this word VoIP somewhere before, and it may mean something about being able to call someone else over the internet. That is partly right, and with today’s ever increasing usage of internet bandwidth, VoIP is slowly but surely creeping its way up and into the corporate communication as an alternative to the current standard that is used, and that is the PABX. Unfortunately, there is a little hitch with this as it is called VoIP security.
Unlike the PABX phone systems, VoIP directly uses the internet to be able to function correctly, and as a result of that internet use, VoIP needs all current computer hardware that is also used in a typical company. It places the burden of protecting even the VoIP from intrusions and denial of service attacks into the hands of the network administrators.
You did not have that with PABX since the PABX only handled telephone calls, not internet traffic. But there is a way to at least protect your VoIP clients from these types of attacks. The burden of defending it is further compounded by the fact that there is no single way to protect both the VoIP servers and the VoIP client computers using a single strategy. There are multiple ways of protecting both of these assets from potential attackers and keeping them at bay.
The reason for preventing attacks on the VoIP is that a single malware that gets through the VoIP system may result in the entire network shutting down, or in the case of a Denial of Service attacks, no information reaches you, and you cannot send information to another location.
The best way to make VoIP security is by layering your hardware and software protection systems in each of the networks that you have, separating every system into small compartments that have direct links only in specific channels and links cannot be interconnected.
It means that you have to strengthen the malware and hardware protection of your servers, virtually separate the computers used for data from the computers that are connected to the VoIP phones and then enhance the malware and virus protection of these networks as well.
By separating the PCs that handle data exclusively from the equipment that use the VoIP phones, any attack via VoIP can be contained right then and there. Since there is no information in the network where the VoIP phone is connected, a probable intrusion is prevented.
You may now ask how does the system know that the data that is being transmitted by the VoIP phone is legitimate or not? Well, there can be authentication of the data packets that are sent back and forth from the local server to the VoIP phones. There is also what we call virtual LAN network to isolate these sections from other sections within the same network.
Overall, there are many ways to implement VoIP security in your network that will not cost that much. It is just how you manage to achieve virtual LAN networks, segmentation of each of these networks so that any intrusion attempt will not succeed, or at the very least, the layered approach to VoIP protection slows it down to a crawl until it stops.