Hello,

our mailserver daemons (exim, dovecot, courier-imap) are limited to one key/cert configuration per instance. But for certain reason, we need the same service to be accessable be two different ip-addresses/domain names each with its own certs.

What I'm trying to do is the following:

server-a.com is the real daemon, e.g. exim listening on 1.1.1.1:smtps

server-b.com is listening to 1.1.1.2:smtps (with its own cert), but is routing/tunneling all traffic to server-a.com:smtps

Is this possible with openssl? I don't know how to do it. The problem is, that the work isn't done by simply tunneling the data to server-a.com, because then the client would get a certificate-doesn't -match-with-domain-error. server-b.com has to use the actual data (not the whole traffic including the ssl-conversation) and establish a new connection to server-a.com.

If this cannot be done with openssl out of the box, how else could I do this?

Regards
Marten
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