Hi there,
running into some strange issue between two OF instances - mostly configured the same way but one machine throws the following message during initial s2s connection setup:
Unable to authenticated the connection: SASL authentication failed (and dialback is not available)
Both using self signed certificates and the s2s config looks like this on both machines:
- STARTTLS policy required
- Mutual Authentication disabled
- Certificate chain checking allow self signed + verify cert
- Encryption Protocols TLS1,2,3 + SSL2 Hello
Machine #1 can write message to machine #2 (receivices it) but machine #1 did not receive a written message from machine #2.
What kind of missconfiguration can cause this issue? Note that s2s on machine #1 is working properly in both directions with other servers like jabber.ccc.de