VPC and Mac OS X Firewall

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Stephen Adams - 26 Nov 2006 19:43 GMT

Please forgive me if this question has been covered before, but my ISP
only keeps one month's worth of newsgroup messages. I tried searching
through that meager archive and didn't see this question.

How does the Mac OS X firewall affect a VPC guest running with shared
networking? I'm using VPC 6.1.x and the Virtual Switch option doesn't
work, so I'm stuck with the shared setup. Does the Mac OS X firewall
affect a VPC at all? I know that if I had another computer attached to
my Internet Sharing port, the firewall does affect that, but I'm not
clear on the virtual sharing part.

How can I tell which comes first in the data flow; the Mac OS X firewall
or the virtual networking sharing?

Thanks in advance.

Steve

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Jeff Wiseman - 27 Nov 2006 01:05 GMT

> Please forgive me if this question has been covered before, but my ISP
> only keeps one month's worth of newsgroup messages. I tried searching
[quoted text clipped - 9 lines]
> How can I tell which comes first in the data flow; the Mac OS X firewall
> or the virtual networking sharing?

I'm no expert on this but I have experimented some :-)

I'm pretty sure that VPC shows up behind your firewall (i.e., on
your mac's sub network). I have concluded this by running some
port scanning utilites on a website. With the mac's firewall on I
can stealth everything. With it off, the PC related ports seem to
be visible from the outside network. Since I can control
visibility of the VPC ports from the mac firewall, I have
concluded that the VPC runs behind the firewall.

If I remember correctly, I executed the web based tools via
Internet Explorer in VPC, once with the mac's firewall on, and
once with it off.

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Jeff Wiseman
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Stephen Adams - 27 Nov 2006 14:38 GMT

>> Please forgive me if this question has been covered before, but my ISP
>> only keeps one month's worth of newsgroup messages. I tried searching
[quoted text clipped - 22 lines]
> If I remember correctly, I executed the web based tools via Internet
> Explorer in VPC, once with the mac's firewall on, and once with it off.

Thank you Jeff. I appreciate your experimentation and feedback. :)

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Mac Forum / Applications / Virtual PC / November 2006

VPC and Mac OS X Firewall