Firewall settings

Updated on May 08, 2026

In order for the edudip webinar room to function reliably in corporate networks, adjustments to firewall, proxy or browser settings may be necessary in rare cases. This guide summarizes the necessary technical requirements in a compact way and helps IT departments to correctly approve all relevant connections for stable audio and video transmission in the webinar.

edudip GmbH, based in Aachen, was founded in early 2010 and is the go-to provider for next-generation webinar software. With nearly 4 million participants, over 1 million webinars conducted, and numerous renowned corporate clients, edudip is among the leading providers of webinar software from Germany.

The edudip webinar room is a browser-based online seminar room for conducting training sessions, presentations, and meetings with up to 1,000 participants per webinar, based on modern web technologies such as HTML5, WebRTC, and WebSocket connections.

In rare cases, these technologies require the configuration of an existing firewall, web proxy, and/or browser policies. To ensure the best possible user experience, you or your IT department should consider the following points during this configuration:

• Please note that no additionally installed browser plugin (such as an ad blocker) should block the WebRTC standard. Furthermore, the WebRTC standard should always be enabled in the browser (e.g., via company policies).
• For using the webinar room, we recommend Google Chrome and Mozilla Firefox, each in one of their two latest versions. Browsers such as Internet Explorer or outdated Edge do not have the necessary technological prerequisites. Further information can be found in our Technical Requirements.
• WebSocket connections (via HTTPS) are used for communication between the edudip servers and the user's browser. Additionally, an HTTPS connection to a media server is established for audio/video transmission. If a connection cannot be established, an attempt is made to tunnel it via a TURN server.
• For seamless use of the edudip webinar room, it is necessary to allow all the domains listed below, along with their respective transport protocols and ports, through your firewall(s) and/or proxy servers. Communication must be unobstructed. For example, if "Deep Packet Inspection" is used, it must permit WebRTC and WebSocket connections for the specified domains.

Optional port forwarding (UDP) is not necessary in most cases.

This optimizes latency, and in rare cases, port forwarding is necessary.