I just recently upgraded the house network to Verizon FiOS, so right now I'm using a FiOS wireless gateway/router in the house. I have two MacBook Pros - Mine is a 15" MBPr with 10.9 installed. Girlfriend has a Mid 2010 - 17" MBP with 10.8.5 In early August she brought home 'Cisco AnyConnect Secure Mobility Client' This is VPN software that will allow her to remotely connect to work to RDP into her workstation there. I'm not sure if the software is exactly the culprit. We aren't sure exactly when Bonjour services stopped working - but they stopped. The first red flag was that she was no longer able to print to the wireless printer. That's obviously connected via bonjour/airplay. I can add/remove the printer on my MBPr and print to it. Her printer doesn't find the printer, even when I explicitly tell it the IP address. The AirPlay indicator on the top menu bar of her desktop does not appear anymore. This is turned on in System Pref -> Display -> "Show mirroring options in the menu bar when available" is turned on. This works on my MBPr and the indicator is always present in the house. iMessages was a problem, but she signed out and back into iCloud, and was able to then send messages to other iOS users. However, under closer inspection, I'm seeing that bonjour contacts are not working when I have both of our laptops next to each other. I should be showing up in the contact list. I've read extensively that Bonjour isn't something that can be turned off, then on again. Restarting the machine doesn't seem to work. Before I uninstall Cisco, or re-install the OS, I wonder if anyone has any tips on what I may be able to troubleshoot first.