Firewall ports for Skype for Business integrations
When integrating Pexip Infinity with Microsoft Skype for Business and Lync
| Direction | Purpose | Protocol | Source | Destination |
|---|---|---|---|---|
| Between the SfB/Lync FEP and the Conferencing Node (bidirectional) | SIP signaling | TCP | <any> | 5061 |
| From SfB/Lync clients or SfB/Lync servers towards the Conferencing Nodes | RTP/RTCP media | UDP | <any> | 40000–49999 |
| From SfB/Lync clients towards the Conferencing Nodes | HTTP conference avatar | TCP | <any> | 80 |
| From the Conferencing Nodes towards a SfB/Lync Edge Server (AV Edge Interface) | RTP/RTCP/RDP media | UDP / TCP | 40000–49999 | 50000–59999 |
| From the SfB/Lync Edge Server (AV Edge Interface) towards Conferencing Nodes | RTP/RTCP/RDP media | UDP / TCP | 50000–59999 | 40000–49999 |
| From the Conferencing Nodes towards SfB/Lync clients or SfB/Lync servers | RTP/RTCP/RDP/VbSS media | UDP / TCP | 40000–49999 | <any> |
| From the Conferencing Nodes towards the TURN server | RTP/RTCP media | UDP | 40000–49999 | 3478 |
| From the Conferencing Nodes towards the SfB/Lync Web Conferencing service | PSOM (PowerPoint presentation from SfB/Lync) | TCP (TLS) | 55000–65535 | 443 / 8057 |
| From the Conferencing Nodes towards the SfB/Lync Front End Server or Edge Server | HTTPS (PowerPoint presentation from SfB/Lync) | TCP (TLS) | 55000–65535 | 443 |
| From the Conferencing Nodes towards the Web Application Companion (WAC) server / Office Web Apps (OWA) server / Office Online Server (OOS) | HTTPS (PowerPoint presentation from SfB/Lync) | TCP (TLS) | 55000–65535 | 443 |
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For a complete list of Pexip Infinity Conferencing Node port usage, see Pexip Infinity port usage and firewall guidance.
* Note that where this documentation refers to "SfB/Lync", it represents both Microsoft Skype for Business and Lync unless stated otherwise.
Skype for Business / Lync clients behind strict firewalls
If your SfB/Lync clients are behind a strict network, and only the minimum ports are allowed for B2B SfB/Lync communication, you may need to allow a few extra flows outbound:
- Your PC must be able to connect outbound to the internal interface of your SfB/Lync AV Edge Servers on port 3478/UDP (blue arrow).
- Your SfB/Lync AV Edge servers must be able to connect outbound to Pexip Conferencing Nodes for media, on port range 40000–49999 TCP & UDP for optimal HD video and content sharing (orange arrow).
