Le jeudi 8 octobre 2026, 17:39:52 heure d’été d’Europe centrale Marc SCHAEFER a 
écrit :
> Hello,
> 
> If I understand well, the certbot in bookworm LTS is version 2, which does not
> support ARI (dynamic windows to resist to mass revocations). Even trixie
> certbot is not 4.1+.
> 
> Even on bookworm, as certbot is started twice a day, and
> 
>    /etc/letsencrypt/renewal/XXX.ch.conf:# renew_before_expiry = 30 days
> 
> it should work no problem in 2027 (64 days certificate lifetime,
> reissuing recommended at 2/3 of certificate life) or even 2028
> (45 days, 2/3 is just 30 days).
> 
> Do you agree with this analysis?

I thinks this should be discussed first with security team for first fixing 
trixie than if possible do a backport to LTS.

We have a few month to get a solution but it should be made in correct order to 
avoid regression on upgrade.

Rouca
> 
> Have a nice day/evening.
> 
> Reference:
>    https://letsencrypt.org/2025/12/02/from-90-to-45
> 
> 

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