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Re: Selection of Appropriate Local SMTP Relay

  • From: bmanning
  • Date: Tue Jan 11 01:17:40 2000

 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
> ----------------------------------------------------------------------
> 
> 






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