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#16514 invalid NAT port forwarding doesn't work for loopback address on host xnoreq
Description

Setup: Windows 10 host and Linux guest with a single NAT adapter.

Port forwarding: TCP from host address 127.0.0.1 and port 9092 to guest port 9092

On the guest: nc -l -p 9092 (simply listen on the port with netcat)

Test on the host: nc 127.0.0.1 9092

No connection is established, nc immediately exits. telnet 127.0.0.1 9092 immediately exits with: "Connection closed by foreign host."

I have checked, and VirtualBox.exe does listen on 127.0.0.1:9092 TCP, but new connections show up as waiting connections in state Time wait in netstat on the host.

The only way I've got this port forwarding to work is to remove the 127.0.0.1 host address from the port forwarding, and then connect to the host's external IP in the test.

Why doesn't it work for 127.0.0.1 on the host?

#17716 invalid VBox stuck in write loop with 5.2.10, corruption -> Arch Linux issue xnoreq
Description

Host: Windows 10, VBox Version 5.2.10 r122406 (Qt5.6.2)

Guest: Arch Linux 4.16.4-1-ARCH Installed package: virtualbox-guest-modules-arch 5.2.10-3 https://www.archlinux.org/packages/community/x86_64/virtualbox-guest-modules-arch/

In the guest I have a shared folder, fstab: shared /mnt/shared vboxsf uid=1000,gid=1000,rw,dmode=700,fmode=600,comment=systemd.automount

Now if I run qbittorrent (also installed from Arch repos) in the guest and e.g. download Arch (see magnet link at https://www.archlinux.org/download/) then as soon as it starts to download the iso:

1) VirtualBox.exe CPU usage on the host increases dramatically 2) VirtualBox.exe shows heavy I/O write (20x - 30x than the download rate within the guest) 3) qbittorrent in the guest shows high CPU usage

Analyzing the writes on the host:

20:55:36,3166640	VirtualBox.exe	1840	CreateFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Desired Access: Generic Read, Disposition: Open, Options: Synchronous IO Non-Alert, Non-Directory File, Disallow Exclusive, Attributes: N, ShareMode: Read, Write, AllocationSize: n/a, OpenResult: Opened
20:55:36,3170140	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 4.096, Length: 4.096
20:55:36,3171295	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 8.192, Length: 4.096
20:55:36,3172539	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 12.288, Length: 4.096
...
the file is being allocated
...
20:55:42,1340471	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 284.164.096, Length: 4.096
20:55:42,1341867	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 284.168.192, Length: 4.096
20:55:42,1342749	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 284.688.384, Length: 4.096
20:55:42,1343604	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 285.212.672, Length: 4.096
20:55:42,1344587	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 285.736.960, Length: 4.096
20:55:42,1345399	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 286.261.248, Length: 4.096
20:55:42,1346192	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 286.785.536, Length: 4.096
20:55:42,1347007	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 287.309.824, Length: 4.096
20:55:42,1347766	VirtualBox.exe	1840	ReadFile	C:\shared\archlinux-2018.04.01-x86_64.iso	END OF FILE	Offset: 287.834.112, Length: 4.096
20:55:45,6189281	VirtualBox.exe	1840	QueryOpen	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	CreationTime: 27.04.2018 20:52:44, LastAccessTime: 27.04.2018 20:52:44, LastWriteTime: 27.04.2018 20:54:20, ChangeTime: 27.04.2018 20:54:20, AllocationSize: 284.168.192, EndOfFile: 284.168.192, FileAttributes: A
20:55:45,6190843	VirtualBox.exe	1840	QueryOpen	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	CreationTime: 27.04.2018 20:52:44, LastAccessTime: 27.04.2018 20:52:44, LastWriteTime: 27.04.2018 20:54:20, ChangeTime: 27.04.2018 20:54:20, AllocationSize: 284.168.192, EndOfFile: 284.168.192, FileAttributes: A
20:55:45,6191496	VirtualBox.exe	1840	CreateFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Desired Access: Generic Read/Write, Disposition: OpenIf, Options: Synchronous IO Non-Alert, Non-Directory File, Disallow Exclusive, Attributes: N, ShareMode: Read, Write, AllocationSize: 0, OpenResult: Opened
20:55:45,6192084	VirtualBox.exe	1840	QueryInformationVolume	C:\shared\archlinux-2018.04.01-x86_64.iso	BUFFER OVERFLOW	VolumeCreationTime: xxx, VolumeSerialNumber: xxx, SupportsObjects: True, VolumeLabel: xxx
20:55:45,6192206	VirtualBox.exe	1840	QueryAllInformationFile	C:\shared\archlinux-2018.04.01-x86_64.iso	BUFFER OVERFLOW	CreationTime: 27.04.2018 20:52:44, LastAccessTime: 27.04.2018 20:52:44, LastWriteTime: 27.04.2018 20:54:20, ChangeTime: 27.04.2018 20:54:20, FileAttributes: A, AllocationSize: 284.168.192, EndOfFile: 284.168.192, NumberOfLinks: 1, DeletePending: False, Directory: False, IndexNumber: 0x3400000001536f, EaSize: 0, Access: Generic Read/Write, Position: 0, Mode: Synchronous IO Non-Alert, AlignmentRequirement: Word
20:55:45,6193266	VirtualBox.exe	1840	CloseFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	
20:55:45,6194764	VirtualBox.exe	1840	QueryOpen	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	CreationTime: 27.04.2018 20:52:44, LastAccessTime: 27.04.2018 20:52:44, LastWriteTime: 27.04.2018 20:54:20, ChangeTime: 27.04.2018 20:54:20, AllocationSize: 284.168.192, EndOfFile: 284.168.192, FileAttributes: A
20:55:45,6196035	VirtualBox.exe	1840	WriteFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 1.572.864, Length: 4.096, Priority: Normal
20:55:45,6197488	VirtualBox.exe	1840	WriteFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 1.572.864, Length: 4.096
20:55:45,6198623	VirtualBox.exe	1840	WriteFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 1.572.864, Length: 4.096
20:55:45,6199472	VirtualBox.exe	1840	WriteFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 1.572.864, Length: 4.096
20:55:45,6200234	VirtualBox.exe	1840	WriteFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 1.572.864, Length: 4.096
...
this keeps on going and never stops
...
20:56:09,7814536	VirtualBox.exe	1840	WriteFile	C:\shared\archlinux-2018.04.01-x86_64.iso	SUCCESS	Offset: 1.572.864, Length: 4.096

Naturally, the resulting file is corrupted.

#3869 wontfix Implement a real autoupdater (MacOS) xmppler
Description

Please implement the excellent autoupdater framework Sparkle. http://sparkle.andymatuschak.org/

Otherwise you could remove the current update checker at all - it's useless. I always read on a newssite that there is a new version of virtualbox and the builtin update checker still tells me "your version is current".

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