Let’s you stop Prosody from sending <starttls xmlns=‘urn:ietf:params:xml:ns:xmpp-tls’> feature to choppy/buggy servers which therefore would fail to re-negotiate and use a secure stream. (e.g. OpenFire 3.7.0)


Copy the plugin into your prosody’s modules directory.

And add it between your enabled modules into the global section (modules_enabled).

Then list each host as follow:

tls_s2s_blacklist = { "host1.tld", "host2.tld", "host3.tld" }

In the unfortunate case of OpenFire… you can add the Server’s ip address directly as it may not send proper rfc6121 requests.

tls_s2s_blacklist_ip = { "a.a.a.a", "b.b.b.b", "c.c.c.c" }


It’s supposed to work with 0.7-0.8.x


With the plugin installer in Prosody 0.12 you can use:

sudo prosodyctl install --server= mod_s2s_never_encrypt_blacklist

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