Ports
Read on 2026-10-15. Confirm before relying.
| Port | Proto | Dir | Use | Source |
|---|---|---|---|---|
| 80 | TCP | Outbound | HTTP for sign-in, reporting, and support pages. | Community port article |
| 443 | TCP | Outbound | HTTPS for sign-in, reporting, and support. | Community port article |
| 1024-65535 | UDP | Outbound | RTP between Five9 applications. Without a stateful firewall, allow the return path. WebRTC also sends STUN on these ports. | WebRTC community article |
| 2200-2300 | TCP | Outbound | Encrypted Java RMI on the community softphone table. Java Agent and Supervisor desktops left the customer portal after 1 August 2026. Confirm whether your site still launches Java admin. | Java application requirements |
| 5060-5067 | UDP | Outbound | SIP for the agent application. | Community port article |
| 5080 | UDP | Outbound | SIP signaling on the Five9 SIP proxy. | Community port article |
| 5081 | TCP | Outbound | SIP over TLS on the Five9 SIP proxy. | Community port article |
| 8000-8015 | UDP | Outbound | Source ports the article lists for desktop RTP. | Community port article |
| 8080/8081 | TCP | Outbound | Network assessment at quality.five9.com. | Community port article |
| 8083 | TCP | Local | Five9 Softphone Service. The article says to keep other processes off it, and to open it on the host firewall when VDI needs it. | Community port article |
| 8843 | TCP | Outbound | HTTPS download of Five9 applications and API. | Community port article |
| 8880 | TCP | Outbound | HTTP download of Five9 applications. | Community port article |
| 443 | TCP | Outbound | Supervisor PC to WEM cloud, application access. | Supervisor workstation requirements |
| 4443 | TCP | Outbound | Supervisor or admin workstation to the VO cloud for the Interaction Analytics UI. | Supervisor workstation requirements |
Sources and go deeper
- Community port article. community. last checked 2026-10.
- WebRTC community article. community. last checked 2026-10.
- Java application requirements. vendor. last checked 2026-10.
- Supervisor workstation requirements. vendor. last checked 2026-10.
- IANA service names and port numbers. ports. last checked 2026-10.
- RFC 3261, SIP: Session Initiation Protocol. rfc. last checked 2026-10.
- RFC 3550, RTP. rfc. last checked 2026-10.
- RFC 3551, RTP profile for audio and video. rfc. last checked 2026-10.
- ITU-T G.711. standard. last checked 2026-10.
- RFC 8446, TLS 1.3. rfc. last checked 2026-10.
- RFC 9293, Transmission Control Protocol. rfc. last checked 2026-10.
- RFC 768, User Datagram Protocol. rfc. last checked 2026-10.
- RFC 8825, WebRTC overview. rfc. last checked 2026-10.