Re: Allowing ICMP packets through ISA server

  • From: "Jim Harrison" <jim@xxxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Thu, 27 Jun 2002 06:18:34 -0700

..and the $64K answer was?
I imagine there are quite a few folks in the list that would be interested..

Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/authors/harrison/
Read the books!
----- Original Message -----
From: "arun prasadh" <arun_arun@xxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Thursday, June 27, 2002 12:07 AM
Subject: [isalist] Re: Allowing ICMP packets through ISA server


http://www.ISAserver.org


Hi Jim,

Thanks a lot. we have solved the problem.
Its working fine.

Regards
Arun
----- Original Message -----
From: "Jim Harrison" <jim@xxxxxxxxxxxx>
Date: Wed, 26 Jun 2002 21:46:49 -0700
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Subject: [isalist] Re: Allowing ICMP packets through ISA server


> http://www.ISAserver.org
>
>
> First of all, allowing ping isn't secure, since it's the most basic of DoS
> attacks.
> You need to take a look in your event logs and ISA logs; something isn't
> right with your server (no duh, huh?).
> You can use http://jalojash.org/isascripts/isainfo.vbs to gather all the
> basic info about your ISA server and fwd it to the list.
> Maybe then that'll have some details...
>
>
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/authors/harrison/
> Read the books!
> ----- Original Message -----
> From: arun prasadh
> To: [ISAserver.org Discussion List]
> Sent: Wednesday, June 26, 2002 9:10 PM
> Subject: [isalist] Re: Allowing ICMP packets through ISA server
>
>
> http://www.ISAserver.org
> Hi Jim,
>
> Yes the IP Routing is Enabled .Still it doesnt work what might be the
> problem.
>
> again i have encountered a peculiar problem.
> If I stop the firewall  service only I am  able to ping  with the filters
> created in the FW enabled .
> when the firewall is stopped how the filters inside the firewall is
working.
> Also if the Packet filter is disabled , even if the FW service is started
or
> stopped it doesnt allow ping
> When i start the FW service with the Packet Enabled it doesnt allow ping
or
> any ICMP packet.
> Is it secure to stop the FW servcie and enable the Packet Filters to
enable
> to PING .
> Thanks
> Arun
>
> ----- Original Message -----
> From: "Jim Harrison"
> Date: Wed, 26 Jun 2002 06:31:24 -0700
> To: "[ISAserver.org Discussion List]"
> Subject: [isalist] Re: Allowing ICMP packets through ISA server
>
>
> > http://www.ISAserver.org
> >
> >
> > One other possibility; have you selected "Enable IP routing" in IP
Packet
> > Filters properties?
> > Jim Harrison
> > MCP(NT4, W2K), A+, Network+, PCG
> > http://isaserver.org/authors/harrison/
> > Read the books!
> > ----- Original Message -----
> > From: "arun prasadh"
> > To: "[ISAserver.org Discussion List]"
> > Sent: Tuesday, June 25, 2002 10:55 PM
> > Subject: [isalist] Re: Allowing ICMP packets through ISA server
> >
> >
> > http://www.ISAserver.org
> >
> >
> >
> > Thanks Jim,
> >
> > It doesnt work even after i created these two filters, however when i
stop
> > the firewall service it allows me to ping .
> >
> > kindly assist
> >
> > thanks
> > Arun
> > ----- Original Message -----
> > From: "Jim Harrison"
> > Date: Tue, 25 Jun 2002 22:32:01 -0700
> > To: "[ISAserver.org Discussion List]"
> > Subject: [isalist] Re: Allowing ICMP packets through ISA server
> >
> >
> > > http://www.ISAserver.org
> > >
> > >
> > > Ahh, I must have read it inside out...
> > > You'll need to create two packet filters:
> > > 1.
> > > Name: "DMZ Ping In"
> > > Filter Type: ICMP ping query
> > > Local Computer: "These computers (on the perimeter network)"
> > > (enter your DMZ subnet here)
> > > Remote Computer:
> > > 2.
> > > Name: "DMZ Ping Out"
> > > Filter Type: ICMP all outbound
> > > Local Computer: "These computers (on the perimeter network)"
> > > (enter your DMZ subnet here)
> > > Remote Computer:
> > >
> > > Jim Harrison
> > > MCP(NT4, W2K), A+, Network+, PCG
> > > http://isaserver.org/authors/harrison/
> > > Read the books!
> > > ----- Original Message -----
> > > From: "arun prasadh"
> > > To: "[ISAserver.org Discussion List]"
> > > Sent: Tuesday, June 25, 2002 10:14 PM
> > > Subject: [isalist] Re: Allowing ICMP packets through ISA server
> > >
> > >
> > > http://www.ISAserver.org
> > >
> > >
> > > Thanks Jim,
> > >
> > > I am not using LAT , i am using Public address in the DMZ. To start
with
> i
> > > want to check whether my Hosts in the DMZ are alive by using Ping and
> > Trace
> > > Route command.
> > >
> > > I am setting up FW for the first time , kindly assist.
> > >
> > > Thanks.
> > > Arun
> > >
> > > ----- Original Message -----
> > > From: "Jim Harrison"
> > > Date: Tue, 25 Jun 2002 22:08:19 -0700
> > > To: "[ISAserver.org Discussion List]"
> > > Subject: [isalist] Re: Allowing ICMP packets through ISA server
> > >
> > >
> > > > http://www.ISAserver.org
> > > >
> > > >
> > > > ISA doesn't allow ICMP to pass inbound to the LAT.
> > > > You can't create a rule for it, either.
> > > >
> > > > Jim Harrison
> > > > MCP(NT4, W2K), A+, Network+, PCG
> > > > http://isaserver.org/authors/harrison/
> > > > Read the books!
> > > > ----- Original Message -----
> > > > From: "arun prasadh"
> > > > To: "[ISAserver.org Discussion List]"
> > > > Sent: Tuesday, June 25, 2002 9:27 PM
> > > > Subject: [isalist] Allowing ICMP packets through ISA server
> > > >
> > > >
> > > > http://www.ISAserver.org
> > > >
> > > >
> > > > How to allow ICMP request from external INTERNET to the internal
local
> > > > network through the ISA firewall. what rule should i create to allow
> the
> > > > request and for response.
> > > >
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