RE: OT: Quick book
- From: Troy Radtke <TRadtke@xxxxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 13 Apr 2004 12:32:25 -0500
Take that back! I don't dress funny......
Troy Radtke
CCNP, A+, Network+, Server+
Technical Network Analyst
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Tuesday, April 13, 2004 12:06 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: OT: Quick book
http://www.ISAserver.org
criticism:
- you're ugly and your mother dresses you funny.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "Kenny Mann" <Kennymann@xxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Tuesday, April 13, 2004 09:33
Subject: [isalist] RE: OT: Quick book
http://www.ISAserver.org
Sure. Whatever helps the community :-)
... critisim, I'd glady accept it.
Kenny Mann
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Tuesday, April 13, 2004 10:52 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: OT: Quick book
http://www.ISAserver.org
Hi Kenny,
I'd be happy to publish your Quick Book on ISAserver.org when you're done
and even help you with the editing prior to publishing it.
HTH,
Tom
Thomas W Shinder
www.isaserver.org/shinder <http://www.isaserver.org/shinder>
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
<http://www.microsoft.com/isaserver/beta/default.asp>
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp <http://tinyurl.com/1llp>
-----Original Message-----
From: Kenny Mann [mailto:Kennymann@xxxxxxxxxxx]
Sent: Tuesday, April 13, 2004 10:45 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] OT: Quick book
http://www.ISAserver.org
Here is something I've written just becuase I'm tired of
having to basically say the same thing over and over... so instead of
complaining I've decided to do something about it and give people
direction... (plus it's easier to give a URL than type this whole thing up).
This is only something I've written and a couple more sections to come. I
thought I would get yall's opinoin about it. I've decided I don't want to
write something huge or else people go cross eyed, and some people just want
to know what they are getting into before they jump in.
Things I plan on having:
1. Firewalls * Only one done so far *
2. Mail Server *Plan on writting during lunch today;
Will include Exchange Server, AV, SendMail, Exim, POP/IMAP/Exchange
concepts, will tie in with firewall* 3. Web Server *Tonight; IIS, Apache,
PHP/ASP+MySQL combo's, will tie in with firewall* 4. Hosting your own domain
(ties in with all of the above a little, but gives the basic concept of the
internet) 5. Some basic examples (going to include a full setup for Windows,
Linux, and OpenBSD -- and also give a basic checklist of what people will
want to look for)
Anyone think I forgot something critical for the first
little section?
//=========================================
Ok.. I've seen the question over and over on many
mailing list asking "How do I run my own firewall/email
server/website/<insert service here>?". This little article is here to give
a very brief explanation of what is what and to give you a general direction
to take. If anyone has any questions, comments, flames, or concerns feel
free to email me at <insert public address here> The goal of this little bit
is so anyone can read it, and get a general clue. If you don't understand a
word, google it. That's how you learn in this field.
1. Firewalls
Firewalls are the first line of defense (of hopefully
many) you have against hackers. When I refer to hackers, I mean someone
trying to do something to your data that they shouldn't be. This could be
someone in the internet or someone in your own building. When a program
needs to talk to another computer, it uses "ports" to communicate. There are
many ports commonly used to communicate. A mail server usually has port 25
open, a web server usually has port 80 open, IMAP and POP3 (these two
services are common methods of getting your email and putting it on your
desktop) run on port 143 and 110. As an administrator, your job is to choose
what people can and can not do. The most suggestive method is to deny
everything, and allow only what you need. What this means, is lets assume
you only want your people to only be able to surf the internet. You would
only allow port 80 (there is another port for secure HTTP protocol, but
right now we are just going basic). This means that there browser, Internet
Explorer usually, but anything else will not such as FTP, or email. This
method is preferred becuase a user could install something on there machine
and that machine could try to send data to someone outside of your network,
assuming your firewall is setup to block everything excepyt certain ports,
this would hopefully stop that machine from going outside and if you logging
level is turn high enough, you will get reports of someone trying to do
something they weren't supposed to. IPTables, Microsoft ISA Server, and
ZoneAlarm are three different firewalls with the same goal. IPTables is used
in Linux, MS ISA Server and ZoneAlarm are used on Windows. ZoneAlarm is good
to use for personal use but not for business use becuase it rely's on the
user to answer the questions. I, personally, suggest using Microsoft ISA
Server or one of the Linux firewalls (IPChains, IPTables, etc) becuase of
how stout they are. If you are cheap, then go the Linux solution, if you
have money to spare (or have to use Windows) then I suggest MS ISA Server.
MS ISA server is signifigantly easier to setup than the Linux solutions, or
at least that has been my experiance. If you plan on hosting your own email,
website, or anything connected to the internet, I would always have a
firewall on that computer. It's commonly suggested to have a firewall
directly connected to the internet and have another computer behind that
firewall which hosts your services, with the logic that if something happens
to your firewall the computer behind it is OK or at least has a greater
chance of being OK.
---------
Kenny Mann
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