[26643] in North American Network Operators' Group
Re: Selection of Appropriate Local SMTP Relay
daemon@ATHENA.MIT.EDU (bmanning@vacation.karoshi.com)
Tue Jan 11 01:18:15 2000
From: bmanning@vacation.karoshi.com
Message-Id: <200001110645.WAA07751@vacation.karoshi.com>
To: forrestc@iMach.com (Forrest W. Christian)
Date: Mon, 10 Jan 2000 22:45:56 -0800 (PST)
Cc: dts@senie.com (Daniel Senie), jabley@patho.gen.nz (Joe Abley),
nanog@merit.edu
In-Reply-To: <Pine.BSF.3.96.1000110222525.438A-100000@workhorse.iMach.com> from "Forrest W. Christian" at Jan 10, 2000 10:42:04 PM
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Errors-To: owner-nanog-outgoing@merit.edu
why not use the 127.0.0.0/8 space ... :)
> 223.255.255.2 - Secondary DNS
> 223.255.255.3 - SMTP Mail
> 223.255.255.4 - Time Server
>
> You could very easily support this in ANY network. No additional
> HW/software required.
>
> Specifically:
>
> config> ip route 223.255.255.1 255.255.255.255 dns.ser.ver.addr
> config> ip route 223.255.255.3 255.255.255.255 smtp.ser.ver.addr
>
> and so on.
>
> You then add an alias on the loopback interface for the "well known"
> address and make sure your dns/smtp daemon binds to it.
>
> Easy to implement, easy to explain, no additional coding changes required,
> although it would be nice to have stuff ship with these pre-configured.
>
> All that you need is a chunk of address space reserved for this and a list
> of services, each assigned to an address.
>
> I think that, barring the need to find/get the IP address block, it should
> take only a day or so to build an appropriate list of services.
>
> The main DNS detractor that I see is figuring out how to hand out DNS
> server numbers in a CONSISTENT, RELIABLE fashion for roaming users.
>
> Remember, that the purpose of this is for someone to be able to find the
> "correct" server to provide the services which a roaming user will find at
> different locations depending on where they are dialing in, thus, a
> config for a user would be:
>
> DNS Servers - varies by location
> SMTP server - varies by location
> pop3/imap server - always home isp
> time server - varies by location
>
> etc....
>
> Thus the table would only list those services which should vary based on
> where the user is dialing in/connecting.
>
> - Forrest W. Christian (forrestc@imach.com) KD7EHZ
> ----------------------------------------------------------------------
> iMach, Ltd., P.O. Box 5749, Helena, MT 59604 http://www.imach.com
> Solutions for your high-tech problems. (406)-442-6648
> ----------------------------------------------------------------------
>
>
