Eyeball AnyFirewall Engine

AnyFirewall Engine provides a feature-rich NAT traversal SDK for application developers and device makers. Here are a few technical highlights:

• Most comprehensive implementation of STUN, TURN, and ICE, plus optional features such as UPnP gateways and HTTP tunneling through web-proxies.
  

• Automatic selection of transport modes (UDP or TCP), and transparent translation of UDP to TCP when using TCP relaying.
  

• Supports symmetric RTP and smart keep-alives for signaling and media connections.
  

• Multiparty calls with hybrid UDP, TCP and HTTP streams.
  

• Traversal for voice, video, instant-messages and file-transfer.
  

• Minimized call completion time by pre-fetching and caching candidates.
  

• Simple C/C++ API familiar to TCP/IP socket programmers.
  

• Works with 3rd party SIP/XMPP stacks & voice/video engines.
  

• PC and embedded system support including Microsoft Windows, Linux, Android, iPhone/iOS, Neutrino, J2ME, and Windows 7.

The rich set of APIs offered by AFE enable developers to write VoIP or other peer to peer applications without the concern of firewall traversal problems. Figure 6 shows the diverse kinds of VoIP applications that can be built using the AFE API. AFE integrates with third party application protocol stacks and media engines as well.

Figure 6: VoIP applications built using the AFE API

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