You've got a daughter? Any pictures? :-p t
----- "I may disapprove of what you say, but I will defend to the death your right to say it."
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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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