UDP for multimedia with Windows firewall

[cameron.bunch]

I am wondering if others have had problems using UDP for multimedia data when the machine to which one wants to connect is Windows 7 and it’s Windows firewall is active. When I attempt to do this I get a connection reset by peer error. If I disable the Windows firewall there is no problem connecting. I have tried connecting from both Mac OSX and Linux machines with the same result. This is happening on a local LAN environment with no filtering devices between the machines. I have created firewall rules that should allow free flow of UDP packets in both directions but they do seem to affect the problem. Same results on both 32-bit and 64-bit Win 7.

The following is an error report from Event Viewer reporting the failure. Note that I added firewall rules specifically for nxnode.bin just in case it needed to process the UDP traffic:

Faulting application name: nxnode.bin, version: 4.6.12.0, time stamp: 0x00000000
Faulting module name: libnx.dll, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x0001a649
Faulting process id: 0x17d0
Faulting application start time: 0x01d0d5c377450720
Faulting application path: C:\Program Files\NoMachine\bin\nxnode.bin
Faulting module path: C:\Program Files\NoMachine\bin\libnx.dll
Report Id: bc1ef13f-41b6-11e5-a4f3-000c294220f8

The NX version running on both ends is 4.6.12.

 

[fra81]

Hi cameron,

here are two possible issues. The first one is about the failure in establishing a connection and it seems the same issue tracked here: https://www.nomachine.com/TR08M05855. The normal behaviour would be that the connection falls back to using TCP seamlessly.

The second possible issue is about UDP being not functional with the firewall enabled, regardless the exception rule. We will do more tests in our labs with the same environment. Thanks for reporting!

[Author]

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