﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
10034	Slow upload on a NATed Windows XPSP3  guest	alt236		"Hello!

I am having some problems with a Guest XP SP3 VM.

Even though the download speed on the NATed interface is reasonably high, but the upload speed seems to be capped at about ~50Kb/sec, works in bursts and eventually hangs. It seems to be worse when FTPing a large number of files in succession.

I've tried the same VM under a MacOS and a Linux host with the same results.

The moment I switch from NAT to a bridged interface, the upload speed returns to a reasonable level. 

I disabled the QoS scheduler from the Guest's network interface with no results.
I also tuned the TCP buffer with no effect.


There have been some similar problems in the past (not sure if they are related):
https://forums.virtualbox.org/viewtopic.php?f=2&p=154844

https://www.virtualbox.org/ticket/1656

https://www.virtualbox.org/ticket/3400

Many thanks!
Alex
"	defect	closed	network/NAT	VirtualBox 4.1.6	fixed			Windows	Mac OS X
