Re: Think outside the GUI challenge #1
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 28 Dec 2005 20:25:40 -0600
Ha! You just missed her. We sent her back today. She told us she's giving up
the teacher's life to start working again and is relocating to some island off
San Diego. Will be a nice place to visit.
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://spaces.msn.com/members/drisa/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
**Who is John Galt?**
> -----Original Message-----
> From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 8:19 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> Now you bees playing in my old neighborhood (Tom, get your
> daughter in on this). Let's not confuse "Hayes" with "modem".
>
> A "modem" (Modulator / Demodulator) is nothing more than a
> signal translation device, regardless of its intended
> application (DSL, dial-up access, AM radio, etc.)
> - In the MODulation function, it uses a baseband signal (CAT5
> in this case) to modify one or more aspects (phase,
> frequency, amplitude) of a carrier signal in a predefined manner.
> - In the DEModulator function, it performs a reverse process,
> extracting the baseband signal from the modified carrier signal.
>
> Here's a reasonably decent discussion on how DSL signals are
> propagated:
> http://computer.howstuffworks.com/dsl4.htm
>
> It's not "audible" audio, but it is audio, nonetheless...
>
> --------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> --------------------------------------------
> -----Original Message-----
> From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 5:47 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> It depends on your definition of "audio." If you mean that
> the signaling is
> based on square waves of a fixed high and low amplitude at a
> particular
> frequency being interpreted as a digital signal, then OK.
> But if you are
> defining DSL's"audio" nature as the modulation of
> electromagnetic signals
> into true "sound" (which is what a modem does) by creating signals of
> amplitude, frequency and phase represented in the form of the typical
> trigonometric sine and cosine wave (analog), then I must respectfully
> disagree.
>
> t
>
>
> -----
> "I may disapprove of what you say,
> but I will defend to the death your
> right to say it."
>
>
> ----- Original Message -----
> From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Wednesday, December 28, 2005 4:55 PM
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
>
> http://www.ISAserver.org
>
> Ok, smarty-pants.
> The CAT5 electrical signals that represent the Ethernet
> traffic are used to
> modulate the audio between the modem & the DSLAM.
>
> DSL is by nature, audio.
>
> --------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> --------------------------------------------
> -----Original Message-----
> From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 4:19 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> I'm going to pretend like I never read that. Ethernet
> signals are used to
> modulate audio signals? I'll have a puff, please.
>
> t
>
> -----
> "I may disapprove of what you say,
> but I will defend to the death your
> right to say it."
>
>
> ----- Original Message -----
> From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Wednesday, December 28, 2005 3:41 PM
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
>
> http://www.ISAserver.org
>
> Actually, the ones that bridge Ethernet to telco are modems.
> They use the Ethernet signals to modulate the audio signals
> carried to the
> DSLAM.
>
> --------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> --------------------------------------------
> -----Original Message-----
> From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 1:13 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> Just like the marketroids call them "modems." There ain't a
> BIT o' analog
> modulation a'goin on...
>
> -----
> "I may disapprove of what you say,
> but I will defend to the death your
> right to say it."
>
>
> ----- Original Message -----
> From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Wednesday, December 28, 2005 12:48 PM
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
>
> http://www.ISAserver.org
>
> ..but of course you have, oh Diva of SBS fame.
>
> The marketroids call them "routers".
> Sometimes they're part of the modem; sometimes not.
> Sometimes they're configured for NAT, sometimes not.
> When it's not NAT-ing, it's acting like a hub (bridge).
>
> In this case, the only interesting part is that the device is
> configured as
> a bridge.
>
> --------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> --------------------------------------------
>
> -----Original Message-----
> From: Amy Babinchak [mailto:amy@xxxxxxxxxxxxxxxxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 12:37 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> What's a DSL bridge? I've never run into one of those in
> small business
> land.
>
> Amy
>
> Harbor Computer Services
> Small Business Computer Specialists
>
> Client Blog: http://smalltechnotes.blogspot.com/
> Tech Blog: http://isainsbs.blogspot.com/
> Website: http://www.harborcomputerservices.net/
>
>
>
> -----Original Message-----
> From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 3:10 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> Oooo..k.
>
> Jeff gets step #1.
> For those of us not "netsh-aware", the full command would be
> (assuming you
> named the external interface "north"):
> - netsh int ip add addr north 10.0.0.1 255.255.255.0
>
> Alexandre gets "most sickliest response". :-p
>
> To continue the challenge, answer the following questions:
> 1. why doesn't it work yet?
> 2. what non-GUI step must be taken to make it work?
>
> ..remember; ISA policies are not interesting yet.
>
> --------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> --------------------------------------------
>
> -----Original Message-----
> From: Alexandre Gauthier [mailto:gauthiera@xxxxxxxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 12:01 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> Your answer makes me moist in my special places.
>
> -----Message d'origine-----
> De : Bunting, Jeff [mailto:BUNTING@xxxxxxxxxxxx]
> Envoyé : 28 décembre 2005 14:58
> À : [ISAserver.org Discussion List]
> Objet : [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> how about with
> netsh interface ip add address
>
> Jeff
>
> -----Original Message-----
> From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 2:29 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
> Remember; this is the "out of the GUI" challenge.
> How would you accomplish item 1 from the command line?
>
> Also, it still won't work (incomplete).
> What other non-ISA, non-GUI steps must be taken?
>
> #2 answered correctly.
>
> --------------------------------------------
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/Jim_Harrison/
> http://isatools.org
> Read the help / books / articles!
> --------------------------------------------
>
> -----Original Message-----
> From: Roy Tsao [mailto:roy_tsao@xxxxxxxxxxxx]
> Sent: Wednesday, December 28, 2005 11:07 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Think outside the GUI challenge #1
>
> http://www.ISAserver.org
>
>
> 1) Bind a additional static IP 10.0.0.X/24 to ISA External Interface
> 2) In case of dynamic IP, static IP can't assign as per 1)
>
>
> > Merry Xmas & Happy New Year!
> >
> > In the spirit of giving, here's a "think outside the GUI" challenge
> for
> > you.
> >
> > Scenario:
> > - ISA is connected directly to the Internet via a "manageable" DSL
> > bridge
> > - ISA uses 123.123.123.123/24 static external IP; DG = 123.123.123.1
> > - Internal LAN uses 10.9.8.x/24
> > - DSL bridge has unchangeable 10.0.0.2/24 internal IP
> > - DSL bridge offers web-based management on that internal IP
> >
> > Internet
> > |
> > DSL Bridge
> > |- 10.0.0.2/24
> > |- 123.123.123.123/24
> > ISA
> > |- 10.9.8.x/24
> > LAN
> >
> > Note:
> > - The DSL bridge internal IP is irrelevant to normal
> Internet access.
> > Because it's operating in "bridge" (as opposed to NAT) mode, it's
> > effectively transparent to the ISA for Internet traffic.
> >
> > Challenges:
> > 1. Allow either ISA-local or ISA-internal to access the DSL
> bridge web
> > interface 2. Explain why the correct solution is impossible to
> > implement if the ISP provides a dynamic IP.
> >
> > Hint:
> > - The core of the solution has nothing whatsoever to do with ISA
> itself.
> >
> > --------------------------------------------
> > Jim Harrison
> > MCP(NT4, W2K), A+, Network+, PCG
> > http://isaserver.org/Jim_Harrison/
> > http://isatools.org
> > Read the help / books / articles!
> > --------------------------------------------
> >
> >
> > All mail to and from this domain is GFI-scanned.
>
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