Re: Packets blocked despite IP Filter...

  • From: "Jim Harrison" <jim@xxxxxxxxxxxx>
  • To: "[ Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Mon, 30 Sep 2002 12:26:01 -0700

How much time elapses between filter creation and testing?
Changes to ISA are not instaneous...

 Jim Harrison
 MCP(NT4, W2K), A+, Network+, PCG
 Read the books!

----- Original Message -----
From: "Alfonso Lopez de Ayala" <alopezdeayala@xxxxxxxxxxxx>
To: "[ Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Monday, September 30, 2002 9:40 AM
Subject: [isalist] Packets blocked despite IP Filter...

Can't figure out this one?  Am I overlooking something way basic?

To allow server (W32Time service) to synchronize time with external SNTP
server (the famous at I have set up the
following IP Packet Filter:

Filter Type:
     IP Protocol: UDP
     Direction: Send receive
     Local port: All ports
     Remote port: Fixed port
     Remote port number: 123

This computer:
     This ISA server's external IP address:

Remote computer:
     This remote computer:

Then in the Firewall logs I see the packets to UDP port 123 blocked:

Date:           2002-09-30
Time:           02:44:20
Protocol:       Udp
Param#1:        50111
Param#2         123
Filter rule:    BLOCKED

Why is it blocking them???

List Archives:
ISA Server Newsletter:
ISA Server FAQ:
Exchange Server Resource Site:
Windows Security Resource Site:
Windows 2000/NT Fax Solutions:
You are currently subscribed to this Discussion List as:
To unsubscribe send a blank email to $subst('Email.Unsub')

Other related posts: