Hi Maarten,
On 16 Jun 2015, at 16:33, Maarten Hoes <[email protected]> wrote:
> Hi,
>
>
> Im experiencing an odd networking issue with VirtuaBox 4.3.28 on an Windows
> 8.1 host, and a CentOS 7 linux guest.
>
> When I set my networking to 'bridged adapter', (some) outgoing traffic seems
> to malfunction. For example, a simple command like 'wget
> http:/www.google.com' just seems to 'hang'. (ping/icmp does work though). But
> soon as I switch the network to 'NAT' (and restart the vm), the wget command
> succeeds and retrieves the web page as expected. Setting the network to 'NAT'
> has an issue of it's own though, as I seem to be unable to ssh into the vm.
> Im not sure if these issues are related or if they are seperate.
>
> So since switching networking to and from 'bridged adapter' and 'NAT'
> introduces the behaviour, and no other changes to the vm is made, makes me
> wonder if I might be running into a VirtuaBox bug. I have no idea on how to
> start troubleshooting the issue, though.
Please start by disabling both checksum and segmentation offloading in the
guest (‘ethtool -K’ is the way to go).
> Does VirtuaBox have a way to produce a debug log or something that I could
> post somewhere (like on this list or in a bug report) that would be useful ?
Enabling the packet tracing feature may shed some light on the issue. Here is
how to do it: https://www.virtualbox.org/wiki/Network_tips
>
>
>
> - Maarten
>
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Aleksey
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