Re: ARP

Hi John,

The Ethernet broadcast space is different from the routing issues. Sure,
you can ARP and get the hardware address, but you'll need a route to get
the packet to the right network ID, even if they're on the same physical
network segment.

HTH,
Tom

Thomas W Shinder 
www.isaserver.org/shinder 
ISA Server and Beyond: http://tinyurl.com/1jq1 
Configuring ISA Server: http://tinyurl.com/1llp 



-----Original Message-----
From: John Tolmachoff [mailto:isalist@xxxxxxxxxxxx] 
Sent: Saturday, March 01, 2003 11:01 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ARP


http://www.ISAserver.org


If a e-mail server on the Internal network on private address has the
public
IP of that server added to the NIC for a peering resolution, will the
ISA
server on Windows 2000 ARP for all addresses and include that public
address
in its ARP Cache?

Example:

Public IP of ISA 1.1.1.2
Internal IP of ISA 10.0.0.1
Public e-mail server IP 1.1.1.3
ISA setup to send 1.1.1.3 to 10.0.0.11
Internal mail server 10.0.0.11

Also bind IP 1.1.1.3 to NIC of internal mail server so it will accept a
peering e-mail addressed to user@xxxxxxx

ISA receives a packet destined for 1.1.1.3 and sends it to 10.0.0.11.
The
internal e-mail server NIC receives and passes it to the SMTP Engine. 

John Tolmachoff MCSE, CSSA
IT Manager, Network Engineer
RelianceSoft, Inc.
Fullerton, CA  92835
www.reliancesoft.com

> -----Original Message-----
> From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
> Sent: Friday, February 28, 2003 5:37 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: ARP
> 
> http://www.ISAserver.org
> 
> 
> ISA doesn't, but Windows will.
> 
>  Jim Harrison
>  MCP(NT4, W2K), A+, Network+, PCG
>  http://www.microsoft.com/isaserver
>  http://isaserver.org/Jim_Harrison
>  http://isatools.org
> 
>  Read the help, books and articles!
> ----- Original Message -----
> From: "John Tolmachoff" <jtolmachoff@xxxxxxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Friday, February 28, 2003 14:54
> Subject: [isalist] ARP
> 
> 
> http://www.ISAserver.org
> 
> 
> Does ISA ARP for all address on the internal network?
> 
> 
> 
> John Tolmachoff MCSE, CSSA
> 
> IT Manager, Network Engineer
> 
> RelianceSoft, Inc.
> 
> Fullerton, CA  92835
> 
> www.reliancesoft.com
> 
> 
> 
> 
> 
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