Companies using public IP space owned by others for internal routing

Jason Iannone jason.iannone at gmail.com
Mon Dec 18 13:58:37 CST 2017


My previous employer used 198.18/15 for CE links on IPVPN services.
Walgreens used an American SP's space internally and couldn't talk to
any users in that space as a result.

On Sun, Dec 17, 2017 at 11:31 PM, Eric Kuhnke <eric.kuhnke at gmail.com> wrote:
> some fun examples of the size of ipv6:
>
> https://samsclass.info/ipv6/exhaustion-2016.htm
>
> https://www.reddit.com/r/theydidthemath/comments/2qxgxw/self_just_how_big_is_ipv6/
>
> On Sun, Dec 17, 2017 at 7:05 PM, Large Hadron Collider <
> large.hadron.collider at gmx.com> wrote:
>
>> Missent.
>>
>> Welcome to IPv6, where you have technically-reserved-for-future-use space
>> that should never actually need to be used. Quite likely, you can use
>> something like 440::/16 as your private space, but please don't do that
>> unless you've exhausted the true private space.
>>
>> You're welcome.
>>
>>
>>
>> On 17/12/2017 14:57, James Downs wrote:
>>
>>> On Dec 17, 2017, at 14:33, Matt Hoppes <mattlists at rivervalleyinternet.net>
>>>> wrote:
>>>>
>>>> Had a previous employee or I discovered it on the network segment after
>>>> we had some weird routing issues and had to get that cleaned up. I don't
>>>> know why anyone would do that when there is tons of private IP space.
>>>>
>>> Unless there isn't.. I've worked at more than one company that had used
>>> up all the private space. Then you have the cases where some M&A causes
>>> overlapping IP space. In addition, you'd also be surprised how many people
>>> just assign the entire 10/8 space into a flat IP space.
>>>
>>> -j
>>>
>>
>>


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