Firewall ports for Kokous24


H323 protocol endpoints (Avaya, Cisco, Polycom, Yealink, etc.)

 Source ports Protocol Service Destination ports
any UDP RAS Signaling 1719
any  TCP Call Setup 1720
any  TCP Q931/H.245 Signalling 30000-49999
any  UDP RTP/RTCP 30000-49999


SIP protocol endpoints (Avaya, Cisco, Polycom, etc.)

Source ports  Protocol Service Destination ports
any  TCP SIP Signaling 5060-5061
any  TCP Signaling 30000-49999
any  UDP RTP/RTCP and media 30000-49999


Web browser (WebRTC: Firefox, Chrome, Opera, Edge)

  • Google Chrome version 27 and later
  • Mozilla Firefox version 38 and later
  • Opera version 23 and later
  • Microsoft Edge version 20.10532 and later
  • Microsoft Internet Explorer version 10 and later (requires Flash Player 11 and later ActiveX® plug-in, and must not be in Compatibility View)
  • Apple Safari version 6 and later (Mac OS X only) (requires Flash Player 11 and later plug-in)
Source ports Protocol Destination ports
any  TCP 80, 443
any  UDP 40000-49999
any TCP 40000-49999


Skype for Business / Microsoft Lync 2013

Open federation to domain:

Source ports  Protocol Destination ports
any (Skype/Lync client)  TCP 80, 443
any (Skype/Lync client) UDP 40000-49999
any (Skype/Lync server) UDP 40000-49999
any (Skype/Lync server) TCP 40000-49999
any (Skype/Lync server) TCP 5061


Kokous24 servers IP address range


IP address range First IP in range last IP in range





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