I think Linode does not follow the /64 rule and assigns thousands of customers within the 2a01:7e01::/64 block. They user a bunch of blocks, depending on their data centre.
I think by default each client is assigned a single /128 IPv6 address per server. :( On Thu, 25 Nov 2021 05:57:03 -0600 Jarland Donnell via mailop <mailop@mailop.org> wrote: > Blacklists tend to target a whole /64 at once for IPv6 and this is > standard behavior. I just looked at my two Linode VMs and both have one > IPv6 from the same /64. It's possible that Linode is assigning a /64 per > customer and that no one else is in the same /64 as you. This is a > reasonable expectation, and while arguing over v6 implementation will > probably continue for the rest of my lifetime, this is an expected > standard. Here's a little fun thing people like to use as a quick > reference on that note: https://slash64.net/ > > This would suggest that Spamhaus is not blocking all of Linode's IPv6, > but instead just you, a single customer with a single /64. This would be > for the reasons that they note, and would need to be resolved prior to > requesting delisting. If you're certain that the listing has nothing to > do with you, then you'll want to ask Linode support if there could be > anyone else on that /64. If they say yes, stop sending mail over IPv6 > from Linode right away, because blacklists will target a /64 at once and > Linode's implementation will be proven at that moment to be bad. I don't > think that'll be the case though. > > On 2021-11-25 05:15, Mary via mailop wrote: > > I first noticed that all outgoing emails that are using IPv6 > > addresses, are being rejected by anyone using zen.spamhaus.org > > > > I then tried a bunch of my addresses and they all tested as listed in > > https://check.spamhaus.org/ > > > > Please see attached screenshot. > > > > > > > > On Thu, 25 Nov 2021 12:52:18 +0200 Atro Tossavainen via mailop > > <mailop@mailop.org> wrote: > > > >> On Thu, Nov 25, 2021 at 12:33:54PM +0200, Mary via mailop wrote: > >> > Hello everyone, > >> > > >> > I noticed today that spamhaus.org is blocking large net blocks of IPv6 > >> > (2a01:7e01) owned by Linode. Pretty much all my clients hosted at Linode > >> > are being blocked en mass (for IPv6 only). > >> > >> https://www.spamhaus.org/sbl/listings/linode.com contains nothing on > >> IPv6. What exactly are you seeing? > >> > >> > Is there a way to inform spamhaus about this rather aggressive blocking > >> > and get things sorted? > >> > > >> > Thank you. > >> > > >> > > >> > > >> > > >> > _______________________________________________ > >> > mailop mailing list > >> > mailop@mailop.org > >> > https://list.mailop.org/listinfo/mailop > >> > >> -- > >> Atro Tossavainen, Chairman of the Board > >> Infinite Mho Oy, Helsinki, Finland > >> tel. +358-44-5000 600, http://www.infinitemho.fi/ > >> _______________________________________________ > >> mailop mailing list > >> mailop@mailop.org > >> https://list.mailop.org/listinfo/mailop > > > > _______________________________________________ > > mailop mailing list > > mailop@mailop.org > > https://list.mailop.org/listinfo/mailop > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
