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Re: [Xen-devel] Bridged Networking in Dom 0 and Virtual NIC in Windows X

To: enming.teo@xxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Bridged Networking in Dom 0 and Virtual NIC in Windows XP Home 32-bit HVM Guest
From: "Mr. Teo En Ming (Zhang Enming)" <enming.teo@xxxxxxxxxxxxxxx>
Date: Mon, 24 Aug 2009 08:10:42 +0800
Cc: cazyokoyama@xxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
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References: <4A91697E.4080504@xxxxxxxxxxxxxxx> <7D6FDE16725D4797962C2DDCB414234B@xpjpn> <4A9172B6.4080906@xxxxxxxxxxxxxxx> <5F96C422BD754FCA85AE381766AF12F5@xpjpn> <4A9174BB.8040604@xxxxxxxxxxxxxxx> <90BEA6D1FC8B4356BB0116E3BA3CEA57@xpjpn> <4A91D85E.7090806@xxxxxxxxxxxxxxx>
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Hi Caz,

I did a tcpdump on my ethernet bridge eth0.

When the firewall on Dom 0 is up, I see DHCP request packets but NO DHCP reply packets.

When I flushed all the firewall rules on Dom 0, I see both DHCP request and reply packets going to my Win XP Home Dom U.

Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering) 
BEng(Hons)(Mechanical Engineering)
Technical Support Engineer
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
Alma Maters: Singapore Polytechnic, National University of Singapore

On 08/24/2009 08:01 AM, Mr. Teo En Ming (Zhang Enming) wrote:
Hi Caz,

I found out why my Win XP Home HVM dom U couldn't access the outside world. It's because of the firewall rules on my Dom 0. When I flushed all my firewall rules, Dom U could obtain IP address from my wireless router and surf the internet.

So I have to think of adding appropriate firewall rules so that my Dom U could access the outside world when the firewall is enabled.

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