netdev - Re: IPv6 max

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <61cb1468-d1e1-4a47-9c04-71d00d0c59f5@redhat.com>
Date: Wed, 31 Jul 2024 10:08:28 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Kyle Rose <krose@...se.org>, netdev@...r.kernel.org
Subject: Re: IPv6 max_addresses?

On 7/31/24 02:05, Kyle Rose wrote:
> max_addresses, how does it work?
> 
> $ ip -6 addr show scope global temporary dev sfp0 | grep inet6 | wc -l
> 21
> $ sysctl -ar 'sfp0.*max_add'
> net.ipv6.conf.sfp0.max_addresses = 16
> 
> They seem to be growing without bound. What's supposed to be happening here?

 From the related sysctl documentation:

max_addresses - INTEGER
         Maximum number of autoconfigured addresses per interface.

'max_address' only applies to the ipv6 assigned via prefix delegation, 
not to address explicitly assigned from the user-space via the `ip` tool.

Cheers,

Paolo