Search
Phone contact
Sales: 0938989101
Support: (84) 19001563
Support: (84) 19001563
What is a SBC and why not a Firewall
02/03/2016
by Toan Nguyen Quang
A session border controller (SBC) is a dedicated hardware device or software application that governs the manner in which phone calls are initiated, conducted and terminated on a Voice over Internet Protocol (VoIP) network. Phone calls are referred to as sessions.
SBC vs. Firewall
|
SBC
|
Firewall with ALG
|
|
Terminates, re-initiates and initiates signaling & SDP |
Unable to terminate, initiate, re-initiate signaling & SDP |
|
Two sessions – one on each side of system |
Single session dialog across system |
|
Layer 2-7 state aware |
Layer 2-4 state aware |
|
Inspects and modifies any application layer header info (SIP, SDP, ect) |
Inspects and modifies only application layer addresses (SIP, SDP, etc) |
|
Static & dynamic ACLs |
Static ACLs only |
Benefits of Session Border Controllers
Session border controllers uniquely provide all controls required for delivering trusted, reliable, and high-quality IP interactive communications:
- Security: IP private branch exchange (PBX) and UC server denial of service/distributed denial of service (DoS/DDoS) attack protection, SBC self-protection
- Communications reach maximization: IP PBX and UC protocol interworking, remote network address translation (NAT) traversal
- Service-level agreement (SLA) assurance: IP PBX and UC server session admission and overload control, data center disaster recovery, remote site survivability, Quality of Experience (QoE)-based routing, SBC high-availability operation
- Regulatory compliance: session replication for recording Data firewalls with application layer gateways (FW/ALG) are only effective securing data-oriented application infrastructure (PCs, servers).