Kurt,
  I think you want to create a PAC (proxy auto-config) file and direct them
to their local proxy server based on their ip address.  Should work for both
IE and FF.

this page has some good explanations and examples:

http://www.findproxyforurl.com/pac_functions_explained.html

Jeff

On Wed, Dec 30, 2009 at 6:02 PM, Kurt Buff <[email protected]> wrote:

> WPAD works great in the US office, for both FF and IE.
>
> However, I must consider the overseas offices, because it's a really
> bad idea to try to run their web traffic to outside web sites through
> our proxy server here.
>
> The big problem is (as you pointed out) that FF doesn't do the
> DHCP-and-DNS method of WPAD - it *only* looks for
> http://wpad.example.tld/wpad.dat. Therefore, I must find a way for at
> least one of the offices to get their settings for FF (and perhaps IE,
> but that's optional, and can be done otherwise with the DHCP-and-DNS
> method) from the wpad.dat file here in the US, and redirect them to
> the proxy server in their own office.
>
> That's because, as far as I know, given that I have a single
> forest/single domain configuration, I can't have
> http://wpad.example.tld exist in two offices at once, especially with
> two different wpad.dat files.
>
> So, I'm looking for how to serve that up out of the single wpad.dat
> file I can have on the web site.
>
> Even if I get that working, however, I'll still have the issue that if
> the connection is down between here and there, they'll have to
> manually configure their browsers regardless, which is a PITA.
>
> Kurt
>
> On Wed, Dec 30, 2009 at 14:43, Matthew W. Ross <[email protected]>
> wrote:
> > So it's not working for you if you have the DHCP setting for option 252
> set? Even if you have the wpad.* domain pointing at your proxy server?
> >
> > Odd. My reading says that Firefox doesn't even tech the DHCP method. It
> only works with the DNS method. DHCP shouldn't be effecting FF at all...
> >
> > Can you ping wpad, or wpad.yourdomain? I couldn't until I turned off the
> Microsoft DNS server blacklist... which I don't have a link for you right
> now. Microsoft will allow you to enter wpad into your dns server, but won't
> actually respond to it until you turn that blacklist off. That took me half
> a day to figure out.
> >
> >
> > --Matt Ross
> > Ephrata School District
> >
> >
> > ----- Original Message -----
> > From: Kurt Buff
> > [mailto:[email protected]]
> > To: NT System Admin Issues
> > [mailto:[email protected]]
> > Sent: Wed, 30 Dec 2009
> > 14:38:18 -0800
> > Subject: Re: Further WPAD issue - not DNS...
> >
> >
> >> Yes, WPAD works with firefox, but only with DNS, not with
> >> DHCP-and-DNS, even though DHCP-and-DNS is more secure.
> >>
> >> On Wed, Dec 30, 2009 at 13:57, Matthew W. Ross <
> [email protected]>
> >> wrote:
> >> > WPAD does work with firefox... If you select the "Automatically detect
> >> proxy" setting in the proxy configuration.
> >> >
> >> > To do this, You must edit the %programfiles%\Mozilla
> >> Firefox\greprefs\all.js file, and change the following line:
> >> >
> >> > pref("network.proxy.type", 0);
> >> >
> >> > ... to ...
> >> >
> >> > pref("network.proxy.type", 4);
> >> >
> >> > I just need a clean and easy way to do this for all computers in our
> >> domain. Can anybody help with that?
> >> >
> >> >
> >> > --Matt Ross
> >> > Ephrata School District
> >> >
> >> >
> >> > ----- Original Message -----
> >> > From: Kurt Buff
> >> > [mailto:[email protected]]
> >> > To: NT System Admin Issues
> >> > [mailto:[email protected]]
> >> > Sent: Wed, 30 Dec 2009
> >> > 13:16:17 -0800
> >> > Subject: Further WPAD issue - not DNS...
> >> >
> >> >
> >> >> So, I've got the US office working - now I had to consider our
> foreign
> >> >> offices.
> >> >>
> >> >> The AU office has a proxy of its own, but the UK office doesn't have
> a
> >> >> proxy server.
> >> >>
> >> >> I can configure DHCP in each office to point IE to another web site,
> >> >> each for a wpad.dat of their own, for each office, but that doesn't
> >> >> help with FireFox, which is in widespread use.
> >> >>
> >> >> Anyone run into this? Any ideas on how to solve it? I've been
> >> >> googling, and not finding any real answers to this.
> >> >>
> >> >> Kurt
> >> >>
> >> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~
> >> >> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~
> >> >>
> >> >
> >> > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~
> >> > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~
> >> >
> >> >
> >>
> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~
> >> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~
> >>
> >>
> >
> > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~
> > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~
> >
> >
>
> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~
> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~
>
>

~ Finally, powerful endpoint security that ISN'T a resource hog! ~
~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~

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