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Strange Behaviour

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Strange Behaviour - 5.Jun.2005 5:23:00 PM   


Posts: 8
Joined: 22.Mar.2005
Status: offline
Hi all,

Theres something strange...
I've several firewall rules:
1- Allows DNS from internal Network to local Host
2- allows HTTP/HTTPS from internal network for all destinations for peopple belongigng to the internet group (witch contains the internet Active directory group)
3- Allows access for all kind of trafic for frienddomain.com (URLs and domain) for all users.
4- Allows access for all kind of trafic for all destinations for administrators.
5- deny all (default rule)

When one SecureNat client tries to browse www.frienddomain.com... It doesn't work!
In the log, the http requests are treated like if the 2nd rules applies thus it secure Nat client and Secure Nat client are anonymous... "[Confused]"

What do I miss?
Post #: 1
RE: Strange Behaviour - 5.Jun.2005 6:04:00 PM   


Posts: 2187
Joined: 10.Aug.2004
From: fort frances.on.ca
Status: offline
Re-order the rules with anonymous rules at the top.

(in reply to cyrcocq)
Post #: 2
RE: Strange Behaviour - 6.Jun.2005 7:22:00 AM   


Posts: 8
Joined: 22.Mar.2005
Status: offline
You're right.
someone here told me about this article http://www.isaserver.org/articles/ISA2004_AccessRules.html
which I hadn't read (thinking that I had understood these things)
And I've seen that when there's no identification every rule depending on authentication deny access.

Is it a bug? Will it be corrected? Is it possible to consider Secure Nat access as if it's done by some "guest" account?

(in reply to cyrcocq)
Post #: 3
RE: Strange Behaviour - 6.Jun.2005 2:10:00 PM   


Posts: 1848
Joined: 26.Jan.2001
From: Keller, TX
Status: offline
No - it is not a bug.

Think about it - if you have a Firewall that processes access rules in order and you have a rule that allows access based on user account, what would you rather have happen? Allow an anonymous request go through, or limit disallow the request if the firewall can't validate all aspects of the rule?

ISA chooses the more secure option which happens to be latter scenario.

Laziness, not necessity, is the mother of invention.

This has got to be the stupidest thing I've seen on the Internet yet.

[ June 06, 2005, 02:13 PM: Message edited by: ClintD ]

(in reply to cyrcocq)
Post #: 4

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