On 16/04/2023 11:04, Paul Muster via Exim-users wrote:
On 15.04.23 21:54, Sebastian Arcus via Exim-users wrote:
The "back-end" machines are physical machines, on regular
ADSL/VDSL/cable/fibre connections at various locations.
At the moment they send directly to the internet, which requires a
static IP and PTR record.
To solve all of the above issues, I am looking into essentially
diverting all the outgoing and incoming smtp traffic of these servers
through a single gateway server, which will be a vps/cloud server.
Well, that's off-topic on the Exim-list, but maybe a VPN solution would
fit better. Put three additional static IPv4 addresses and IPv6 /64 on
the VPS, build a Wireguard VPN between the VPS and the Exim servers and
use the VPS as a "proxy" on IP level.
Indeed , that is another option. It would imply purchasing additional IP
addresses for every single back-end machine I want to add to the setup,
and the current VPS provider doesn't not allow that - and then I would
have to move elsewhere, which would further increase costs. But yes, it
should work.
Or move the three Exim servers - as virtual machines - into the
datacenter where the VPS runs. Running servers on consumer or even cheap
enterprise access services will not ensure high availability.
Regards,
Paul
--
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/
