This module produces info level log messages with the certificate status and fingerprint every time an s2s connection is established. It can also optionally store this in persistent storage.

info has a trusted valid certificate with SHA1: 11:C2:3D:87:3F:95:F8:13:F8:CA:81:33:71:36:A7:00:E0:01:95:ED

Fingerprints could then be added to mod_s2s_auth_fingerprint.


Add the module to the modules_enabled list.

modules_enabled = {

If you want to keep track of how many times, and when a certificate is seen add

s2s_log_certs_persist = true


trunk Works
0.10 Works
0.9 Works
0.8 Doesn’t work


With the plugin installer in Prosody 0.12 you can use:

sudo prosodyctl install --server= mod_s2s_log_certs

For earlier versions see the documentation for installing 3rd party modules