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Re: eMail Com Between Hosts on a Private Net

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On Wed, Oct 20, 2021 at 8:21 PM Martin McCormick <martin.m@suddenlink.net>
wrote:

> ....
> My thanks to all who replied and thanks for reminding me of some
> of the considerations one needs to think of when setting this all
> up since that's what I used to do as part of my job before
> retiring in 2015.  As for there being 16 subnets in the
> 192.168.x.x number space, one can use variable-width subnet masks
> ....
>
>         I remember early in the nineties our campus went from a
> single Class C to a Class B network and the whole campus used the
> Class B subnet mask with bridges holding the whole thing
> together.  You should have seen some of the arp storms that would
> ....
>         By the time I left, we were using the huge private
> network space of 10.0.0.0 with aNAT or Network Address
> Translation to parts of the old Class B network and it generally
> worked well.
>

Yeah I did that transition a few times in a few organizations :-)


>         I wrote a C then a perl program which would assign IP
> addresses for hosts on our networks that knew the sizes of all
> the subnet masks so assigning IP addresses was something anybody
>

Recommending ipcalc to you. You can run it locally standalone or locally
web-served, or invoke it remotely.
Can pretty easily be embedded in your larger perl app. And naturally there
are many perl modules available
to you which do the same in many different ways, contexts, environments.


>
> Martin
>
>

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Thread

eMail Com Between Hosts on a Private Net "Martin McCormick" <martin.m@suddenlink.net> - 2021-10-20 18:50 +0200
  Re: eMail Com Between Hosts on a Private Net deloptes <emanoil.kotsev@deloptes.org> - 2021-10-20 19:20 +0200
    Re: eMail Com Between Hosts on a Private Net Andrei POPESCU <andreimpopescu@gmail.com> - 2021-10-20 20:00 +0200
  Re: eMail Com Between Hosts on a Private Net Charles Curley <charlescurley@charlescurley.com> - 2021-10-20 20:20 +0200
  Re: eMail Com Between Hosts on a Private Net Joe <joe@jretrading.com> - 2021-10-20 20:20 +0200
    Re: eMail Com Between Hosts on a Private Net "Martin McCormick" <martin.m@suddenlink.net> - 2021-10-21 03:30 +0200
      Re: eMail Com Between Hosts on a Private Net Nicholas Geovanis <nickgeovanis@gmail.com> - 2021-10-22 19:30 +0200
    Re: eMail Com Between Hosts on a Private Net "Martin McCormick" <martin.m@suddenlink.net> - 2021-10-22 18:10 +0200
      Re: eMail Com Between Hosts on a Private Net Joe <joe@jretrading.com> - 2021-10-22 19:10 +0200
      Re: eMail Com Between Hosts on a Private Net Nicholas Geovanis <nickgeovanis@gmail.com> - 2021-10-22 19:40 +0200
      Re: eMail Com Between Hosts on a Private Net David Wright <deblis@lionunicorn.co.uk> - 2021-10-22 21:00 +0200
      Re: eMail Com Between Hosts on a Private Net Andrei POPESCU <andreimpopescu@gmail.com> - 2021-10-23 10:20 +0200

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