Virtual Box vs 3rd party software. Not sending packets.

[Linwe]

Dear forum,
let me 1st of all apologise for any possible violations of forum usage limitations, they, if take place, are not evil-minded, but are completely occasional.

I have a host PC with Windows 7 x64, VirtualBox with Windows XP, a DIR-300 router and a usual ISP without any special limitations.

The issue is that under that virtual Windows XP I can't make a 3rd party software work. It is called AGclient 1.4, it is freeware and can be found here: crapware.aidf(dot)org/files/5/
(it is clean)
Usually this software sends a short message to 80 port to an external server. It works on host Windows 7, but refuses to send the message under guest XP. Just nothing happens, no packets are sniffed, nothing, no network activity.
I tuned the virtual machines to use NAT or Bridge network modes - no luck.

To be honest, I receive the same result under VM machines.
Do you have any ideas?
Thank you.

[mpack]

If you install a modern browser (i.e. Firefox) in the XP guest, does it work?

[Linwe]

Dear moderator, thank you so much for your response and will to help.
Since the 1st post I've tried many different variants:
1) different host OS on different PCs
2) different guest OS, including linuxes with WINE
3) and different browsers or their absence
4) and different routers in place of DIR300 NRU.
No luck.
Something is blocking my software from working from inside the box.
As far as I read up to this point, there's no included firewall in VBox, but it really looks as if there were one, OR like the upperspoken software just can't work on a virtual machine.
I've sniffed packets while using the software - and I see nothing on guest OS, no connections, no connection attempts.
But I do see them while using the software on host OS. It is a usual TCP 80 link to a WWW server and a response from there.

Since the author of the software is not available for some reasons, thus I came here trying to have some testing or aid. Perhaps, I am doing something wrong and can't see the mistake.

I would be extremely happy if someone tested this on his virtual system to achieve same results OR not, both would be utterly informative.
Best regards,
Lin

[mpack]

There is no firewall in VirtualBox. If your VM is using bridged networking to an wired Ethernet NIC then it should be able to communicate in any way any other PC could.

I'll let others decide for themselves if they'll be testing an unknown networking app from a site called "crapware" - I'm afraid I can't spare that amount of time.