One of my users mentioned Bonjour stopped working recently at his home. After doing some research I found others with the same Router having the same issue. Disabling IGMP Proxy fixed the problem.
To disable IGMP Proxy
- Login to your Router using your web browser
- Click Advanced in the top right corner
- Click IGMP Proxy
- Change it to disabled and click Apply
If this doesn't fix it there are a few other things that may...
- Changing wireless to G only
- Disabling IGMP filtering