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How can you tell if someone has hacked into your VOIP and can listen in on your conversations? Any good way to prevent this from happening?
Keep hackers from eavesdropping on VoIP calls | IT Security | TechRepublic.com
There are a number of steps that companies can take to protect themselves against VoIP hackers:
* Keep the VoIP network separate from the data network. Although this does negate some advantages of VoIP ó such as simplified administration through convergence ó it also provides a smaller attack surface and exposes the VoIP network to fewer threats. You can use virtual LAN (VLAN) technology to create a logical separation if you donít want to go with a full-fledged physical separation.
* Use authentication to ensure that those connecting to the VoIP network from the outside are really who they purport to be.
* Use encryption so that if hackers manage to capture VoIP packets, they wonít be able to easily decipher them.
* Use VoIP-aware firewalls and an intrusion detection system/intrusion prevention system (IDS/IPS).
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