RE: Help with the web proxy setup in ISA 2004
- From: "Roy Tsao" <roy_tsao@xxxxxxxxxxxx>
- To: isalist@xxxxxxxxxxxxx
- Date: Tue, 24 May 2005 23:06:57 -0600
My ISA2K4 Box is SP1 patched, FW Client is also SP1ed.
Since client shall be Webproxy client with authentication for HTTP(s)/FTP
download connection as required by content filter (surfcontol), so
autoproxy configuration shall be applied in addional to FW client.
It is true that when autoconfiguration point to full FQDN, authentication
window popup means autoproxy configuration is not download into client
end but when change to simple host name, no popup anymore!
My understanding is the configuration script is obtained through http,
there must be a doubled authentication when address is FQDN before
configuration is done:
phase 1: web proxy client issue http request to ISA FQDN:8080
authentication required and webproxy client can provide
credentials
phase 2: ISA box loopback to itself requesting for ISAFQDN:8080
as agent for client, then authentication required, and
ISA box pass it back to client (that's the reason of
authentication popup).
If it is correct for working merchanism, FQDN shall not be used
because client setting has not been done and does not know how
to bypass ISA proxy to obtain script.
Thanks,
Roy Tsao
> Authentication is completely unrelated to simple vs. qualified names.
> The only place that authentication breaks auto-configuration is for the
> FW client and SP1 fixes this.
>
> -----Original Message-----
> From: Roy Tsao [mailto:roy_tsao@xxxxxxxxxxxx]
> Sent: Tuesday, May 24, 2005 9:12 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Help with the web proxy setup in ISA 2004
>
> In case web proxy authentication is required, the auto-config web
> proxy setting's address shall be changed at ISABox from URL with dot
> into localhost name only i.e.: http://isalocal:8080...
> Otherwise autoconfiguration does work. Authentication window pop-up
> each time when open up new I/E session, and also local address will not
> be by passed by ISA.
>
> > This is a multi-part message in MIME format.
> >
> > ------_=_NextPart_001_01C55FFF.5CB82194
> > Content-Type: text/plain;
> > charset="us-ascii"
> > Content-Transfer-Encoding: quoted-printable
> >
> > Hi Tim,
> > =20
> > In order to use the settings you configured for Web Proxy Direct
> Access
> > in the ISA firewall console, you need to complete the process by
> > configuring the Web proxy clients to use the autoconfiguration script.
> > Autodiscovery will accomplish this just fine, or you can do it
> manually
> > or through Group policy.
> > =20
> > HTH,
> > Tom
> > www.isaserver.org/shinder <http://www.isaserver.org/shinder>=20
> > Tom and Deb Shinder's Configuring ISA Server 2004
> > http://tinyurl.com/3xqb7 <http://tinyurl.com/3xqb7>=20
> > MVP -- ISA Firewalls
> >
> > =20
> >
> > ________________________________
> >
> > From: tim S [mailto:tim724342@xxxxxxxxx]=20
> > Sent: Monday, May 23, 2005 8:15 PM
> > To: [ISAserver.org Discussion List]
> > Subject: [isalist] Help with the web proxy setup in ISA 2004
> >
> >
> > http://www.ISAserver.org=20
> > I have ISA 2004 on w2k3 and it's an edge firewall. I allow all
> protocol
> > from Internal to External (this will soon be changed). All three
> client
> > types are configured in each workstation. My Internal machines have
> > problem accessing internal websites (No looping through firewall). If
> I
> > disable the proxy setting in the browser, workstations have no
> problem.
> > I check marked 'By pass addresses found in the Domain Tab" and also
> > entered my internal domain name in the Web browser tab of "Internal"
> > network properties. I still can't get the web proxy clients not to
> > contact ISA for internal websites. If I use the computer name instead
> > of http://some.http.address.local, everything works fine too. I was
> > able to solve the problem (for the time being) by modifying the
> "Allow
> > all outbound traffic" rule with FROM: Internal and TO: Anywhere. I
> had
> > it preveoulsy as FROM: Internal and TO: External. I think my solution
> is
> > bit convulated. After reading Tom's book, I didn't want to install
> > Ethereal on my firewall but Network monitor has a big learning curve.
> > Your help is greatly appreciated.
> >
> > __________________________________________________
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> > Content-Transfer-Encoding: quoted-printable
> >
> > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> > <HTML><HEAD>
> > <META http-equiv=3DContent-Type content=3D"text/html; =
> > charset=3Dus-ascii">
> > <META content=3D"MSHTML 6.00.2800.1498" name=3DGENERATOR></HEAD>
> > <BODY>http://www.ISAserver.org<BR>
>
>
> > <DIV dir=3Dltr align=3Dleft><SPAN class=3D665252301-24052005><FONT =
> > color=3D#0000ff=20
> > size=3D2>Hi Tim,</FONT></SPAN></DIV>
> > <DIV dir=3Dltr align=3Dleft><SPAN class=3D665252301-24052005><FONT =
> > color=3D#0000ff=20
> > size=3D2></FONT></SPAN> </DIV>
> > <DIV dir=3Dltr align=3Dleft><SPAN class=3D665252301-24052005><FONT =
> > color=3D#0000ff=20
> > size=3D2>In order to use the settings you configured for Web Proxy =
> > Direct Access=20
> > in the ISA firewall console, you need to complete the process by =
> > configuring the=20
> > Web proxy clients to use the autoconfiguration script. Autodiscovery =
> > will=20
> > accomplish this just fine, or you can do it manually or through
> Group=20
> > policy.</FONT></SPAN></DIV>
> > <DIV><FONT color=3D#0000ff size=3D2></FONT> </DIV>
> > <DIV><SPAN class=3D665252301-24052005><FONT color=3D#0000ff=20
> > size=3D2>HTH,</FONT></SPAN></DIV><B>
> > <P align=3Dleft><FONT face=3D"Trebuchet MS" =
> > size=3D2>Tom<BR></FONT></B><A=20
> > href=3D"http://www.isaserver.org/shinder";><B><U><FONT =
> > color=3D#0000ff><FONT=20
> > face=3D"Trebuchet MS"=20
> >
> size=3D2>www.isaserver.org/shinder</FONT></B></U></FONT></A><BR><B><FONT
> =
> >
> > face=3D"Trebuchet MS" size=3D2><FONT color=3D#004000>Tom and Deb =
> > Shinder's Configuring=20
> > ISA Server 2004</FONT><BR></FONT></B><A=20
> > href=3D"http://tinyurl.com/3xqb7";><B><U><FONT color=3D#0000ff><FONT=20
> > face=3D"Trebuchet MS"=20
> >
> size=3D2>http://tinyurl.com/3xqb7</FONT></B></U></FONT></A><BR><B><FONT=
> 20
> > face=3D"Trebuchet MS" size=3D2>MVP -- ISA =
> > Firewalls</FONT></B><B></P></B>
> > <DIV> </DIV><BR>
> > <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
> > <HR tabIndex=3D-1>
> > <FONT face=3DTahoma size=3D2><B>From:</B> tim S =
> > [mailto:tim724342@xxxxxxxxx]=20
> > <BR><B>Sent:</B> Monday, May 23, 2005 8:15 PM<BR><B>To:</B> =
> > [ISAserver.org=20
> > Discussion List]<BR><B>Subject:</B> [isalist] Help with the web proxy
> =
> > setup in=20
> > ISA 2004<BR></FONT><BR></DIV>
> > <DIV></DIV>http://www.ISAserver.org=20
> > <DIV>I have ISA 2004 on w2k3 and it's an edge firewall. I allow
> =
> > all=20
> > protocol from Internal to External (this will soon be
> changed). All =
> > three=20
> > client types are configured in each workstation. My=20
> > Internal machines have problem accessing internal websites
> (No =
> > looping=20
> > through firewall). If I disable the proxy setting in
> the =
> >
> > browser, workstations have no problem. I check
> marked=20
> > 'By pass addresses found in the Domain Tab" and also
> entered =
> > my=20
> > internal domain name in the Web browser tab of "Internal"
> network=20
> > properties. I still can't get the web proxy
> clients =
> > not to=20
> > contact ISA for internal websites. If I use the computer
> name =
> > instead=20
> > of <A =
> >
> href=3D"http://some.http.address.local";>http://some.http.address.local</
> A=
> > >,=20
> > everything works fine too. I was able =
> > to solve the=20
> > problem (for the time being) by modifying the "Allow all outbound
> =
> > traffic"=20
> > rule with FROM: Internal and TO: Anywhere. I had it preveoulsy
> as =
> > FROM:=20
> > Internal and TO: External. I think my solution is bit =
> > convulated. =20
> > After reading Tom's book, I didn't want to install Ethereal on my =
> > firewall but=20
> > Network monitor has a big learning curve. Your help is
> greatly=20
> > appreciated.</DIV>
> > <P>__________________________________________________<BR>Do You =
> > Yahoo!?<BR>Tired=20
> > of spam? Yahoo! Mail has the best spam protection around=20
> > <BR>http://mail.yahoo.com =
> > ------------------------------------------------------=20
> > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=3Disalist
> ISA =
> > Server=20
> > Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server =
> > FAQ:=20
> > http://www.isaserver.org/pages/larticle.asp?type=3DFAQ=20
> > ------------------------------------------------------ Other Internet
> =
> > Software=20
> > Marketing Sites: World of Windows Networking: =
> > http://www.windowsnetworking.com=20
> > Leading Network Software Directory: http://www.serverfiles.com No.1 =
> > Exchange=20
> > Server Resource Site: http://www.msexchange.org Windows Security =
> > Resource Site:=20
> > http://www.windowsecurity.com/ Network Security Library: =
> > http://www.secinf.net/=20
> > Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com=20
> > ------------------------------------------------------ You are
> currently =
> >
> > subscribed to this ISAserver.org Discussion List as: =
> > tshinder@xxxxxxxxxxxxxxxxxx=20
> > To unsubscribe visit =
> > http://www.webelists.com/cgi/lyris.pl?enter=3Disalist Report=20
> > abuse to listadmin@xxxxxxxxxxxxx</P>
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> Network Security Library: http://www.secinf.net/<BR>
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