I shouldn't probably go down this path... as I know this has been discussed
but I'm hoping that this might make a difference.
Abraham,
Even if 240/4 is "fixed", your EzIP scheme will require some sort of NAT
box between the 240/4 addressed devices and the non-EzIP internet. That
NAT box will
> It has been known that multi-national conglomerates have been using it
> without announcement.
This is an assurance that 240/4 would never be permitted for Public Internet.
These “multi-national conglo” has enough influence on the IETF to not permit it.
Ed/
From: NANOG
Abraham,
There is no need to run one giant cluster. Many small clusters with VRFs and
CG-NAT devices to bridge the gap from the VRF to the Internet and keep the
blast radius small, are enough. A CG-NAT ISP should not need to work so hard to
provide a unique enough CG-NAT IP address, as long as
2)"... an operator clearly looking to acquire *publicly routable* space
without being clear that this suggestion wouldn't meet their needs. ":
Since 240/4 has 256M addresses while 100.64/10 has only 4M, a current
CG-NAT cluster can be expanded 64 fold once the 240/4 is
Hi, Tom:
1) Your caution advice to Karim is professional. With a lot of
convoluted topics behind it, however, the net result is basically
discouraging the listener from investigating the possibilities. Since
this is rather philosophical, it can distract us from the essence unless
we carry
Hi, Enno:
0) Thanks for your comments referring to historical efforts.
1) However, the "IPv4 Unicast Extension Project" that your paper
cited does not make any specific recommendation about how to utilize the
240/4 netblock uniformly across the entire Internet. Our proposal, EzIP
Not unusual for random O365 blocks to appear, I especially like they way the
reject message trys to refer the user back to their ISP as if their ISP is in
any way involved with the internal Microsoft blocklist. “<<< 550 5.7.1
Unfortunately, messages from [x.x.x.x] weren't sent. Please contact
Hi everyone, hope y’all had a great holidays.
I’m looking for a Microsoft Office 365 contact who can help us…we’re
struggling to get anywhere using the standard methods.
We have a customer whose subnet is blacklisted, and is causing a lot of
heartache. We’ve proven to a couple of people at this
>
> There's a whole bunch of software out there that makes certain
> assumptions about allowable ranges. That is, they've been compiled with
> a header that defines ..
>
Of course correct. It really depends on the vendor / software / versions in
an environment. A lot of vendors removed that years
On 1/10/24 10:12, Tom Beecher wrote:
Karim-
Please be cautious about this advice, and understand the full context.
240/4 is still classified as RESERVED space. While you would certainly
be able to use it on internal networks if your equipment supports it,
you cannot use it as publicly
Tom Beecher wrote on 10/01/2024 15:12:
( Unless people are transferring RFC1918 space these days, in which case
who wants to make me an offer for 10/8? )
I'm taking bids on 256.0.0.0/8, which is every bit as publicly routable
as 240/4.
Nick
Karim-
Please be cautious about this advice, and understand the full context.
240/4 is still classified as RESERVED space. While you would certainly be
able to use it on internal networks if your equipment supports it, you
cannot use it as publicly routable space. There have been many proposals
Interesting and thank you for sharing.
KARIM
From: Abraham Y. Chen
Sent: January 10, 2024 7:35 AM
To: KARIM MEKKAOUI
Cc: nanog@nanog.org; Chen, Abraham Y.
Subject: 202401100645.AYC Re: IPv4 address block
Importance: High
Hi, Karim:
1)If you have control of your own equipment (I presume
On Wed, Jan 10, 2024 at 07:35:01AM -0500, Abraham Y. Chen wrote:
> Hi, Karim:
>
> 1)?? If you have control of your own equipment (I presume that your
> business includes IAP - Internet Access Provider, since you are asking
> to buy IPv4 blocks.), you can get a large block of reserved IPv4
Hi, Karim:
1) If you have control of your own equipment (I presume that your
business includes IAP - Internet Access Provider, since you are asking
to buy IPv4 blocks.), you can get a large block of reserved IPv4 address
_/*for free*/_ by _/*disabling*/_ the program codes in your current
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