Question

isa server 2006 groups

Asked by: alphanetworks

When i'm creating a isa firewall rule and add the all users group to it my rule works but as soon as i replace it with my own security group,my rule doesn't work anymore.What am i doing wrong?What does the all users group consist of?How can i create my own group so that my rule still works?

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Asked On
2009-06-03 at 02:35:39ID24459349
Topics

Windows 2003 Server

,

Computer Servers

,

MS Forefront-ISA

Participating Experts
1
Points
125
Comments
5

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Answers

 

by: keith_alabasterPosted on 2009-06-03 at 22:44:52ID: 24543828

This is rather an open question - I'll respond to it because i don't think anyone else will given the limited information provided.

Please provide details of how ISA is setup. Where is it within your environment? Is it setup as a firewall/proxy or just proxy? Is ISA installed as a domain member or as a standalone server?

What ISA service packs/ISA supportability packs are installed?

What is the rule? What type of traffic/port are you setting the rule for?

keith

 

by: keith_alabasterPosted on 2009-06-03 at 22:59:06ID: 24543880

To answer the other part of your question the ALL Users group means everything and nothing.

By using the ALL Users group pre-supplied with the ISA installation, you are telling ISA that you have elected not to use any authentication whatsoever for that rule. ISA reads this as that you do not care who uses this rule as you have selected ALL Users.  ISA therefore takes the view that if YOU don't care who is allowed to use this rule, ISA doesn't either and so no reference is made to RADIUS, LDAP, AD and the traffic simply passes through.

If you change this from all users to an AD group for example, everything changes. You are now telling ISA that ANY request passing through ISA that matches this rule will need to be sent by someone that is a member of the AD group(s) that you have assigned.

ISA does this by referencing the authenticating services. As an example, you decide that http/https is only allowed for a selected ad group. The request for a web site arrives at ISA - ISA checks its rules and sees the traffic is allowed but only for a particular AD group.

As the traffic arrived, ISA will have no idea on whether the sender is a member of the AD group or not and so marks an entry denying the traffic - even though the rule says allow. ISA sends a query back to the authenticating LDAP/AD/RADIUS server asking if the sender is a member of the group. If they are, the traffic is allowed to pass to its end destination and an extra entry written to the log. If they are NOT a member of the group, game over, traffic dropped and a deny entry in the log.


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