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Re: [OT] IP address collisions

From Joe Pfeiffer <pfeiffer@cs.nmsu.edu>
Newsgroups linux.debian.user
Subject Re: [OT] IP address collisions
Date 2019-04-19 03:40 +0200
Message-ID <xOqFr-29b-3@gated-at.bofh.it> (permalink)
References (8 earlier) <xNYzv-1Qv-1@gated-at.bofh.it> <xNZ2y-2jV-3@gated-at.bofh.it> <xOeNY-3qv-3@gated-at.bofh.it> <xOf7j-3N1-1@gated-at.bofh.it> <xOgPM-4Sy-13@gated-at.bofh.it>
Organization A noiseless patient Spider

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Dan Purgert <dan@djph.net> writes:

> Nicholas Geovanis wrote:
>> On Thu, Apr 18, 2019 at 7:57 AM Michael Stone <mstone@debian.org> wrote:
>>
>>>
>>> No, the ULA is the IPv6 equivalent of RFC1918 space--you can use it
>>> internally without central registration by choosing a subnet from
>>> fd00::/8. The space is so much larger that it's much less likely that
>>> two sites would pick the same prefix, but there are no guarantees.
>>>
>> But isn't it irrelevant whether they pick the same prefix or not? Routers
>> that respect ULA and RFC1918 shouldn't route any traffic destined to them
>> off the logical subnet. Right?
>
> No.  RFC1918 / ULA are merely "unroutable on The Internet" (as in, they
> cannot be directly accessed from the public internet).  You can freely
> route between them on "private" networks to your heart's content.
>
> For example, I have the RFC1918 subnets
>
>  - 192.168.1.0/24, .2.0/24, .10.0/24, and .20.0/24  (LAN networks)
>  - 10.90.0.0/16 (VPN[1])
>
> [1] way overkill, but lets me move around a bit in case a hotel is using
> part of that range. (I only have the server hand out a /24 out of that
> range, but the LAN's routing table uses the full /16).

I use 192.168.13/24 for my home machines, externally available on my
VPN as 10.13.13/24, on the theory that hotels will be sensitive to
offending superstitious guests.  Haven't had a problem yet!

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Thread

Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-16 17:10 +0200
  Re: Accessing a host with variable IP addresses / connection types Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-04-16 20:50 +0200
    Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-16 21:30 +0200
  Re: Accessing a host with variable IP addresses / connection types Richard Hector <richard@walnut.gen.nz> - 2019-04-17 03:50 +0200
    Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-17 04:20 +0200
  Re: Accessing a host with variable IP addresses / connection types Kevin DAGNEAUX <kevin.dagneaux@fiitelcom.fr> - 2019-04-17 08:40 +0200
    Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-17 14:20 +0200
      Re: Accessing a host with variable IP addresses / connection types Kevin DAGNEAUX <kevin.dagneaux@fiitelcom.fr> - 2019-04-17 15:40 +0200
        Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-17 18:00 +0200
      Re: Accessing a host with variable IP addresses / connection types Joe <joe@jretrading.com> - 2019-04-17 16:10 +0200
        Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-17 18:00 +0200
          Re: Accessing a host with variable IP addresses / connection types Michael Stone <mstone@debian.org> - 2019-04-17 18:20 +0200
            Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-17 18:40 +0200
              Re: Accessing a host with variable IP addresses / connection types Michael Stone <mstone@debian.org> - 2019-04-17 18:50 +0200
                [OT] IP address collisions (was: Accessing a host with variable IP  addresses / connection types) Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-04-17 21:40 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable  IP addresses / connection types) Curt <curty@free.fr> - 2019-04-17 22:10 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable  IP addresses / connection types) Michael Stone <mstone@debian.org> - 2019-04-18 15:00 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable  IP addresses / connection types) Nicholas Geovanis <nickgeovanis@gmail.com> - 2019-04-18 15:20 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable  IP addresses / connection types) Michael Stone <mstone@debian.org> - 2019-04-18 15:30 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable  IP addresses / connection types) Nicholas Geovanis <nickgeovanis@gmail.com> - 2019-04-18 22:40 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable   IP addresses / connection types) Dan Purgert <dan@djph.net> - 2019-04-18 17:10 +0200
                Re: [OT] IP address collisions Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-04-19 03:40 +0200
                Re: [OT] IP address collisions (was: Accessing a host with variable  IP addresses / connection types) Michael Stone <mstone@debian.org> - 2019-04-18 15:00 +0200
                Re: [OT] IP address collisions Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-04-18 20:50 +0200
                Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-18 00:20 +0200
                Re: Accessing a host with variable IP addresses / connection types Michael Stone <mstone@debian.org> - 2019-04-18 00:50 +0200
                Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-18 02:50 +0200
                Re: Accessing a host with variable IP addresses / connection types Michael Stone <mstone@debian.org> - 2019-04-18 15:00 +0200
                Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-18 16:10 +0200
                Re: Accessing a host with variable IP addresses / connection types Michael Stone <mstone@debian.org> - 2019-04-18 16:20 +0200
                Re: Accessing a host with variable IP addresses / connection types Michael Stone <mstone@debian.org> - 2019-04-18 16:50 +0200
                Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-05-03 23:00 +0200
                Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-18 16:50 +0200
      Re: Accessing a host with variable IP addresses / connection types Richard Hector <richard@walnut.gen.nz> - 2019-04-17 19:00 +0200
        Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-17 19:40 +0200
          Re: Accessing a host with variable IP addresses / connection types Richard Hector <richard@walnut.gen.nz> - 2019-04-20 20:30 +0200
            Re: Accessing a host with variable IP addresses / connection types Celejar <celejar@gmail.com> - 2019-04-25 20:20 +0200

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