Hey Jim, That's great! I'm going to lift it for the book (with attribution, of course - you are open source friendly, aren't you?) :-) Tom www.isaserver.org/shinder Get the book! Tom and Deb Shinder's Configuring ISA Server 2004 http://tinyurl.com/3xqb7 MVP -- ISA Firewalls -----Original Message----- From: Jim Harrison [mailto:jim@xxxxxxxxxxxx] Sent: Wednesday, September 29, 2004 5:10 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Firewall Rules http://www.ISAserver.org It doesn't matter if the rule allows or denies. The first rule that matches the request is the one that will act on it. Overall Order: 1. System rules (in listed order) 2. Firewall rules (in listed order) for( Each Non-Default Rule in Listed Order ) { if ( rule matches request ) { if ( rule requires authentication ) { get user credentials if ( user fails authentication ) { SEEYA!!! return; } } else { take rule-defined action return; } } } Deny Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles! ----- Original Message ----- From: "Aman Bedi" <gurkirpal.bedi@xxxxxxxxxxx> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> Sent: Wednesday, September 29, 2004 13:45 Subject: [isalist] RE: Firewall Rules http://www.ISAserver.org Can you please confirm this ? :-) thanks When does it stop while going down .. ? Only if there is a specific rule matching that protocol and user to allow traffic , it allows, otherwise it keeps checking all rules and if none are found matching .. it drops the request .. Right ? If there is a deny for that user/protocol it discards request and stops checking further rules . right ? Aman Bedi | Systems/Network Administrator (MCSD, MCSA 2000, MCSA 2003) 54 West 39th Street, 4th Floor, New York, NY 10018 | Fax +1(212) 202-4318 | Phone +1(212) 278-0178 ext 234 | www.scanbuy.com PRIVILEGED & CONFIDENTIAL The information contained in this email message is intended only for use of the person or entity to whom it is addressed. The contained information is CONFIDENTIAL and LEGALLY PRIVILEGED and exempt from disclosure under applicable laws. If you read this message and are not the addressee, you are notified that use, dissemination or reproduction of this message is prohibited. If you have received this message in error, please notify the sender immediately. ------------------------------------------------------------------------ ---- ------------------------------------------------------------------------ ---- ------------------------------------- _____ From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] Sent: Wednesday, September 29, 2004 1:22 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Firewall Rules http://www.ISAserver.org Hi Aman, They are processed from the top down, with System Policy rules being processed before Firewall Policy. HTH, Tom <http://www.isaserver.org/shinder> www.isaserver.org/shinder Get the book! Tom and Deb Shinder's Configuring ISA Server 2004 <http://tinyurl.com/3xqb7> http://tinyurl.com/3xqb7 MVP -- ISA Firewalls -----Original Message----- From: Aman Bedi [mailto:gurkirpal.bedi@xxxxxxxxxxx] Sent: Wednesday, September 29, 2004 12:09 PM To: [ISAserver.org Discussion List] Subject: [isalist] Firewall Rules http://www.ISAserver.org Hi all, Is there an article which explains how the firewall rules are processed in ISA 2004 ? I mean in what order they are processed and which rule has preference, whats the priority etc .. Thanks Aman Bedi | Systems/Network Administrator (MCSD, MCSA 2000, MCSA 2003) 54 West 39th Street, 4th Floor, New York, NY 10018 | Fax +1(212) 202-4318 | Phone +1(212) 278-0178 ext 234 | www.scanbuy.com PRIVILEGED & CONFIDENTIAL The information contained in this email message is intended only for use of the person or entity to whom it is addressed. The contained information is CONFIDENTIAL and LEGALLY PRIVILEGED and exempt from disclosure under applicable laws. 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