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10.7: A possible workaround for VNC issues
Authored by: Supp0rtLinux on Oct 19, '11 02:24:08PM

I'm the submitter of the hint...

Our scenario is any Mac trying to VNC to a Linux system here on campus. The remote Linux system (CentOS)has only one monitor. We're using the built-in Screen Sharing app (Finder, Apple + K, vnc://hostname). Leopard and Snow Leopard can connect to the Linux host just fine. A Windows PC with TightVNC or RealVNC can hit the Linux PC w/o issue. Built another Linux system for testing and had the same results. 10.7.2 doesn't resolve the problem. The problem is specifically with Lion systems trying to VNC to a remote system. Google searches verify this. Ironically, my 10.7.2 Mac has piss poor performance trying to VNC to this Linux system, but I can VNC from my Mac to my Mac Mini at home on my home network w/o issue. The VPN solution is the only thing that's worked on our local campus and we just stumbled upon it. We're using Wireshark and Cisco NAM to try and isolate things further... perhaps the virtual interface of the VPN or the statefulness of the VPN connection are factors. Also, we're using the built-in VPN connection with the Cisco settings, not the Cisco thick client nor the AnyConnect client.

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