nanog mailing list archives
Re: Making Use of 240/4 NetBlock
From: "John R. Levine" <johnl () iecc com>
Date: 9 Mar 2022 15:06:45 -0500
Um, are you suggesting there is sufficiently heavy use of 240/4 to result in a significant security/stability issue if the address space is allocated? I thought you were arguing too many systems would have to be updated to even send/receive packets with 240/4 in the source or destination field.
Both, actually. A few messages back someone said a cloud provider was using 240/4 for private address space, which is easy to believe since they have their own versions of the system software they run, e.g., Amazon's own distro of linux for use within AWS.
So first you have to figure out all of the random computers that need network stack upgrades, and then, oh, you can't talk to Google or whoever. At this point, either buying a chunk of real IPv4 space or getting IPv6 working looks quite attractive.
Regards, John Levine, johnl () taugh com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly
Current thread:
- Re: V6 still not supported, (continued)
- Re: V6 still not supported Saku Ytti (Mar 19)
- Re: V6 still not supported Masataka Ohta (Mar 20)
- Re: V6 still not supported Randy Carpenter (Mar 09)
- Re: V6 still not supported Seth Mattinen (Mar 09)
- Re: V6 still not supported (was Making Use of 240/4 NetBlock) Tim Howe (Mar 09)
- Re: V6 still not supported (was Making Use of 240/4 NetBlock) Dave Taht (Mar 09)
- Re: Making Use of 240/4 NetBlock John R. Levine (Mar 09)
- Re: Making Use of 240/4 NetBlock David Conrad (Mar 09)
- Re: Making Use of 240/4 NetBlock John Levine (Mar 09)
- Re: Making Use of 240/4 NetBlock David Conrad (Mar 09)
- Re: Making Use of 240/4 NetBlock John R. Levine (Mar 09)
- Re: Making Use of 240/4 NetBlock John Kristoff (Mar 09)
- Re: Making Use of 240/4 NetBlock David Conrad (Mar 09)
- Re: Making Use of 240/4 NetBlock John Levine (Mar 09)
- Re: Making Use of 240/4 NetBlock Masataka Ohta (Mar 09)
- 202203081821.AYC Re: 202203071610.AYC Re: Making Use of 240/4 NetBlock Abraham Y. Chen (Mar 09)
- Re: 202203071610.AYC Re: Making Use of 240/4 NetBlock William Herrin (Mar 09)
- Re: 202203071610.AYC Re: Making Use of 240/4 NetBlock William Herrin (Mar 10)
- Re: Making Use of 240/4 NetBlock Masataka Ohta (Mar 10)