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Building VoIP Security at the Gateway Level
2006-12-22
The VoIP gateway should also offer support for wireless LAN security, including, but not limited to: RADIUS (Remote Authentication Dial In User Service) authentication, as well as EAP-PEAP, EAP-TLS and PSK authentication suites. Buyers should also check for TKIP, AES-CCMP and other encryption ciphers. Optionally, the VoIP gateway could provide a VPN module that offers a standards-based VPN suite that is ICSA- and VPNC-certified and includes advanced support for IPsec, IKE, PKI and NAT traversal. By the way, don't worry if you're not familiar with all of these confusing technologies and specifications. It is important, however, that you work closely with your system designer to ensure that these features are included with, or supported by, the VoIP gateway you ultimately select.
Specific security mechanisms are also available to protect VoIP service as well as the traffic itself. VoIP gateway management functions are ordinarily protected by secure provisioning and key configuration techniques. Your system designer can provide these services. Call signaling, the process used to create a connection, can be authenticated by using one of the approaches specified by the SIP standard, such as HTTP Digest or IPsec with IKE. VoIP media traffic can be secured using IPsec tunnels or SRTP. Ask your gateway vendor about these technologies. Finally, VoIP denial of service (DoS) attacks can be addressed by implementing a stateful packet inspection firewall, as mentioned above.
By John Edwards
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VoIP Providers Statistics |
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Providers in database: 3315
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