Firewall ports for Skype for Business integrations
When integrating Pexip Infinity with Microsoft Skype for Business, the following ports have to be allowed through any firewalls which carry traffic for the involved devices:
| Direction | Purpose | Protocol | Source | Destination |
|---|---|---|---|---|
| Between the SfB FEP and the Conferencing Node (bidirectional) | SIP signaling | TCP | <any> | 5061 |
| From SfB clients or SfB servers towards the Conferencing Nodes | RTP/RTCP media | UDP | <any> | 40000–49999 |
| From SfB clients towards the Conferencing Nodes | HTTP conference avatar | TCP | <any> | 80 |
| From the Conferencing Nodes towards a SfB Edge Server (AV Edge Interface) | RTP/RTCP/RDP media | UDP / TCP | 40000–49999 | 50000–59999 |
| From the SfB Edge Server (AV Edge Interface) towards Conferencing Nodes | RTP/RTCP/RDP media | UDP / TCP | 50000–59999 | 40000–49999 |
| From the Conferencing Nodes towards SfB clients or SfB 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 Web Conferencing service | PSOM (PowerPoint presentation from SfB) | TCP (TLS) | 55000–65535 | 443 / 8057 |
| From the Conferencing Nodes towards the SfB Front End Server or Edge Server | HTTPS (PowerPoint presentation from SfB) | 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) | 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.
Skype for Business clients behind strict firewalls
If your SfB clients are behind a strict network, and only the minimum ports are allowed for B2B SfB 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 AV Edge Servers on port 3478/UDP (blue arrow).
- Your SfB 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).
