December 9, 2013

Enterprise Session Border Controllers, or Firewalls with SIP Application Layer Gateways?

Enterprise firewalls protect IP data networks, servers, and applications against a variety of threats through stateful inspection and filtering. To enable basic VoIP connectivity through the firewall, some firewalls add SIP application layer gateways (SIP ALGs) that translate embedded SIP addresses, in effect allowing the firewall to maintain a single end-to-end SIP session between endpoints residing on either side of the firewall.

By comparison, session border controllers (SBCs) implement a SIP back-to-back user agent. Because a B2BUA divides each SIP session into two distinct segments the SBC is able to completely and effectively control SIP sessions, as well as the associated media flows, in ways that SIP ALGs cannot. This unique capability gives SBCs a clear edge in their ability to securely deliver reliable, high-quality, IP-based interactive communications.

Search Webtorials

Get E-News and Notices via Email




I accept Webtorials' Terms and Conditions.

Trending Discussions

See more discussions...

Featured Sponsor Microsites



Please note: By downloading this information, you acknowledge that the sponsor(s) of this information may contact you, providing that they give you the option of opting out of further communications from them concerning this information.  Also, by your downloading this information, you agree that the information is for your personal use only and that this information may not be retransmitted to others or reposted on another web site.  Continuing past this point indicates your acceptance of our terms of use as specified at Terms of Use.

Webtorial® is a registered servicemark of Distributed Networking Associates. The Webtorial logo is a servicemark of Distributed Networking Associates. Copyright 1999-2018, Distributed Networking Associates, Inc.