Trusting postfix client certs for relaying

2021-04-17 Thread Dan Mahoney (Gushi)
All, The dayjob has a number of machines out in the wild that need to be able to send mail (mostly from cron jobs) home to the mothership. Not all have controllable reverse DNS. It's an issue with donated colo and transit. Doing a bunch of tunnels would work but it's a really stupid answer.

Re: Trusting postfix client certs for relaying

2021-04-17 Thread Jaroslaw Rafa
Dnia 17.04.2021 o godz. 11:56:54 Dan Mahoney (Gushi) pisze: > > The dayjob has a number of machines out in the wild that need to be > able to send mail (mostly from cron jobs) home to the mothership. > Not all have controllable reverse DNS. It's an issue with donated > colo and transit. Doing a b

Re: Trusting postfix client certs for relaying

2021-04-17 Thread Wietse Venema
Dan Mahoney (Gushi): > All, > > The dayjob has a number of machines out in the wild that need to be able > to send mail (mostly from cron jobs) home to the mothership. Not all have > controllable reverse DNS. It's an issue with donated colo and transit. > Doing a bunch of tunnels would work b

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Demi Marie Obenour
On 4/17/21 5:15 PM, Wietse Venema wrote: > Dan Mahoney (Gushi): >> All, >> >> The dayjob has a number of machines out in the wild that need to be able >> to send mail (mostly from cron jobs) home to the mothership. Not all have >> controllable reverse DNS. It's an issue with donated colo and tr

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Wietse Venema
Demi Marie Obenour: > >> It seems that There are knobs that let you list *individual certs* for > >> allowing trusted relaying, but not *individual ca's*. > >> > >> Is there any way around this? > > > > Yes: handle that traffic with a dedicated smtpd instance that only > > trusts your internal ro

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Dan Mahoney
Sent from my iPad > On Apr 17, 2021, at 14:16, Wietse Venema wrote: > Dan Mahoney (Gushi): >> All, >> >> The dayjob has a number of machines out in the wild that need to be able >> to send mail (mostly from cron jobs) home to the mothership. Not all have >> controllable reverse DNS. It's

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Demi Marie Obenour
On 4/18/21 2:39 PM, Wietse Venema wrote: > Demi Marie Obenour: It seems that There are knobs that let you list *individual certs* for allowing trusted relaying, but not *individual ca's*. Is there any way around this? >>> >>> Yes: handle that traffic with a dedicated smtpd inst

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Viktor Dukhovni
On Sun, Apr 18, 2021 at 07:59:07PM -0400, Demi Marie Obenour wrote: > >> Would it be possible to support trusting based on subject alt name? > >> I would like a machine with a certificate for a.example.com to send > >> mail from a.example.com domains. This rather mixes end-to-end properties (the

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Demi Marie Obenour
On 4/18/21 8:04 PM, Viktor Dukhovni wrote: > On Sun, Apr 18, 2021 at 07:59:07PM -0400, Demi Marie Obenour wrote: > Would it be possible to support trusting based on subject alt name? I would like a machine with a certificate for a.example.com to send mail from a.example.com domains.

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Viktor Dukhovni
On Sun, Apr 18, 2021 at 08:49:34PM -0400, Demi Marie Obenour wrote: > >> Each system is issued a certificate for its own domain. Perhaps a > >> better example would be email Subject Alternative Names. > > > > That's not an example (use-case), it is a certificate field. What > > is the use-case.

Re: Trusting postfix client certs for relaying

2021-04-18 Thread Dan Mahoney
> On Apr 18, 2021, at 10:30 PM, Viktor Dukhovni > wrote: > > On Sun, Apr 18, 2021 at 08:49:34PM -0400, Demi Marie Obenour wrote: > Each system is issued a certificate for its own domain. Perhaps a better example would be email Subject Alternative Names. >>> >>> That's not an exam