RE: Firewall dropping packets from some machines
- From: "Steve Moffat" <steve@xxxxxxxxxx>
- To: "ISA Mailing List" <isalist@xxxxxxxxxxxxx>
- Date: Mon, 24 Jan 2005 16:27:00 -0400
Hi Kenny....don't take this the wrong way.
What do you mean all ip access in and out...for what
protocols???....that's just stupid, exchange should be published and
only allow the protocols from it that it needs...ie smtp out and ftp for
GFI. Very very bad security.
________________________________
From: Kenny Mann [mailto:Kennymann@xxxxxxxxxxx]
Sent: Monday, January 24, 2005 4:17 PM
To: ISA Mailing List
Subject: [isalist] RE: Firewall dropping packets from some machines
http://www.ISAserver.org
Sorry, I should clarify further.
Exchange has all ip access in and out.
Back when I first started working here, I foolishly added myself to
everywhere in creation as an admin. I've recently learned the error in
my ways and am plugging the bugs.
I'm still going through the services and telling it to launch as it's
own account (for example: gfi_updater account becuase we use Firefox and
my boss says he wants to track where everyone goes, thusly we need to
force a proxy).
ISA firewall client is installed on all machines except, of course, the
non Windows PC's (Linux and QNX 4.25).
These PC's are having issues as well (but I think that' becuase I've set
the firewall to ask for authentication from anon users).
This particular issue is a "You usually use HTTPS over port 443, you
were trying on port 80 which isn't allowed..." -- my trying to use
rsync.
I thought that giving this IP block unrestricted IP access would fix
this, but apparantly not. I should research the ladder of ISA and see
where in the ladder what happens.
I have some money... I'm going to buy an ISA book... I don't know enough
as I should...
While I'm not a beginner in this field, I believe I have much to
learn... I've the first and only admin here... so a whole lot of "oops,
what was I thinking?!" are cropping up about now as I'm going over
these things.
I think, over time, the error in my ways (adding myself in many 'o
places ) is biting me and is causing permission weirdness.
I say this becuase when I deny access over SSH Putty says it can't
communicate or something of the equivalent.
However what I'm seeing is it connect and then disconnect.
Remote desktop does this as well.
Hmm.
Kenny
-----Original Message-----
From: Steve Moffat [mailto:steve@xxxxxxxxxx]
Sent: Monday, January 24, 2005 1:58 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Firewall dropping packets from some
machines
http://www.ISAserver.org
A couple of things.... Exchange has godly
rights...why??...should be published...and an ftp rule to allow updates
from GFI only.
Is the firewall client installed on the workstations, if not how
is ISA to know who is using these protocols.
If I was you...and I'm not....:), give the authorized users dhcp
reservations and create an address set for then within ISA for the
protocols you want to allow them.
S
________________________________
From: Kenny Mann [mailto:Kennymann@xxxxxxxxxxx]
Sent: Monday, January 24, 2005 3:49 PM
To: ISA Mailing List
Subject: [isalist] RE: Firewall dropping packets from some
machines
http://www.ISAserver.org
Sorry, I neglected to give hardware/os specs.
ISA 2000 - dedicated mode w/ Windows Server 2003.
Machine is a Compaq Prolient ML330 with 2GB of memory.
Kenny
-----Original Message-----
From: Steve Moffat [mailto:steve@xxxxxxxxxx]
Sent: Monday, January 24, 2005 1:17 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Firewall dropping packets from
some machines
http://www.ISAserver.org
Which version of ISA??
S
________________________________
From: Kenny Mann [mailto:Kennymann@xxxxxxxxxxx]
Sent: Monday, January 24, 2005 12:30 PM
To: ISA Mailing List
Subject: [isalist] Firewall dropping packets from some
machines
http://www.ISAserver.org
I'm having some issues that are difficult to pin down
what is going on.
I currently use SSH to get out of my network here (work)
to get into my box at home.
I use Putty.
It's not only SSH that has this problem, but it's enough
to relate to right now...
For a while, life was good and it all worked hunkey dory
(sp?).
Then out of no where (gasp?) it stopped. More than
likely I tweaked a setting, added a patch, or did something stupid and
didn't notice it.
Here is where the fun part comes in.
If I create a Client Address Set and create a protocol
rule to allow full outbound access to whatever I want, it works as if by
magic.
However, if I create a protocol rule and allow certain
users (such as myself) full outbound access, it does not work.
When I say it doesn't work, instead of blocking my
packets directly, it just drops them.
What happens is Putty tries to connect, makes the first
connection, then ISA blocks it.
Many other programs are running into the same issues.
I really don't like adding tons of Client Address Set
for this because it just sounds wrong and insecure -- and difficult
(DHCP -- except for our mail server and ISA server).
Has anyone ran into this before?
I've paid to have someone come out here and spend an
hour trying to figure out what the heck is going on, but he couldn't
figure it out and needed more time.
At the time it was only SSH and remote desktop, which I
was able to deal without at the time and live with the CAS method. Now
it seems, other things aren't working that I didn't notcie.
I got MailEssentials for Exchange and it says it fails
to update (yes, it's on the mail server -- which should have godly
rights -- and still doesn't work).
Yes, in the previously paragraph I say the Client
Address Set method doesn't work for that computer and yet in the passage
before that one, I say it works. I should say that it's picky about the
machines it wants to work on.
I have looked at my logs and it shows nothing.
I'm half way tempted to reinstall ISA Server just
becuase this is a little too weird to be a config problem... Thoughts?
Kenny
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