[vbox-dev] Possible bug in Virtualbox 5.0.4 r 102546 - Guest can´t ping virtualbox host

[Frank Mehnert]

On Tuesday 22 September 2015 17:36:26 Klaus Espenlaub wrote:
> On 21.09.2015 12:10, pcexper at gmail.com wrote:
> > Hi,
> > I have tested this problems in 3 diferent´s computers (2 with windows 10
> > a 1 one with windows 8.1 and the result was the same). I installed
> > virtualbox and guest additions and make a virtual machine with windows
> > XP. Inside the guest machine, i ping to the host computer and i cannot
> > find the host (i find all others computers in network and i tested to
> > ping from another computer´s to this host machine and it find it). I
> > tried to find a solution in the forums with no sucess and make many
> > others diferent´s test to see if i can a solution. And, indeed, i find a
> > solution but, to me, it seems like a bug... i start the virtualbox and
> > the guest machine (windows xp) and then, go to the ethernet
> > configuration of the host machine (where is the IP adress, ...) and
> > change something in there (for example, "Clients for Microsoft Network"
> > and put it back again) and click in OK. when i go to the guest machine
> > and ping to the host IT WORK´S.
> > Can you see this situation ?
> 
> Yes, currently there's a bug in VirtualBox (you forgot the keyword
> "bridged" in the above description) related to network offloading
> (checksumming, segmentation) which leads to corrupted packets when
> echanging data between host and guest (but not with other systems on the
> LAN). What you posted is a workaround which kicks things into the proper
> state.
> 
> We're on it already, but it's a non-trivial issue.

I think the latest Windows test build has the fix:

  https://www.virtualbox.org/wiki/Testbuilds

Frank
-- 
Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox
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