---
type: source
title: Problems with Web Conferences (Probleme bei Webkonferenzen)
tags: [web-conferencing, troubleshooting, network, firewall]
related: [web-conferencing-troubleshooting, jitsi-meet, bigbluebutton, dfnconf-pexip]
created: 2026-07-01
updated: 2026-07-01
sources: ["output/rz_uni_greifswald_de_dienste_webdienste_webkonferenz_probleme_bei_webkonferenzen.md"]
---

# Problems with Web Conferences

This source provides a technical guide for diagnosing and resolving connection and signal transmission issues during web conferences at the Universität Greifswald.

## Key Content

### Diagnostic Workflow
- Guidance and instructions on determining if connection issues are local (affecting only one user/individual participant) or global (affecting all participants).

### Mitigation Strategies
- Practical steps to improve quality, such as disabling cameras or disconnecting other bandwidth-heavy devices.

### Technical Requirements
- **Bandwidth**: Minimum bandwidth requirements for acceptable quality of $\ge 200\text{ KB/s}$ (approximately $1.0$ to $1.5\text{ Mb/s}$ download/upload).
- **Network Stability**: Low Ping and Jitter values with minimal fluctuation.

### Firewall Specifications
- Detailed TCP/UDP port requirements and specific port mappings for:
    - [[bigbluebutton]]
    - [[jitsi-meet]]
    - [[dfnconf-pexip]]

### Support Protocol
- **URZ Support Requirements**: Mandatory evidence for reporting issues via the [[groupware]] ticket system, which must include:
    - A screenshot of the URZ Speedtest (showing the IP address).
    - Connection details (e.g., WLAN/wired, provider).