UBUNTU 9.04 Behind router - noipaddress

[bubugian]

Hi all,
I've a router with mac filtering.
WinXP host and ubuntu904 as guest.

After having started the bridge, winxp stop to communicate.
I've understood that bridge offer a different macaddress to the net, so I add the bridge mac in the router's filter ad winxp it's now ok.
I still have problem with guest. I cannot receive an ip address. Ubuntu link goes up if I manually configure the protocol (correct class, gateway etc.) but I cannot ping host or gateway...

What I'm doing wrong?

Thanks very much!

[vbox4me2]

Using Bridge the Guest will have its own MAC address.

[bubugian]

Using Bridge the Guest will have its own MAC address.

Does not work.

I've assigned to vbcard this MAC: 08:00:00:00:00:02 and I've created a rule on the router.
In ubuntu's 'wired network connections' I've fixed ipaddress, gateway, dns etc but I'm not able to ping..

There's no chance... what I should do ?
Thanks

[vbox4me2]

Can the Guest ping the Host? firewall anywhere?

[bubugian]

>Can the Guest ping the Host?
No, it cannot.

>firewall anywhere?
Windows firewall... but it does not block ping...