Re: force IPv6 dynamic address?

[Jeremy Ardley <jeremy@ardley.org>]

On 24/3/22 1:11 am, Tim Woodall wrote:
> On Wed, 23 Mar 2022, Jeremy Ardley wrote:
>
> > I have a debian workstation with a static IPv6 address mapped in DNS 
> > as well as dynamic addresses which change with time.
> >
> > The problem I have is that when my thunderbird mail client connects 
> > to gmail it always uses the static IPv6 address as originator and 
> > this shows up in the headers of the delivered mail.
> >
> > How can I make my system and/or thunderbird use the constantly 
> > changing dynamic IPv6 address instead?
>
> I believe it's setting this to 2 that you want (I think there's a
> setting to go in eni to do this too)
>
> https://sysctl-explorer.net/net/ipv6/use_tempaddr/
>
> Tim.
My concern is that if I go to 1 or 2 then logging for non email activity 
may suffer.

In the meantime for my non gmail accounts I've modified my mail server thus

cat smtp_header_checks
/^Received:.*with ESMTPSA/  REPLACE Received: <REDACTED>
/^X-Originating-IP:/        IGNORE
/^X-Mailer:/                IGNORE
/^Mime-Version:/            IGNORE
/^User-Agent:/            IGNORE

Which also helps avoid the embarrassment of admitting I use Thunderbird :-)

--
Jeremy

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