pluginviewer returned this, as well as several other plugins :

List of server plugins follows


Plugin "plain" [loaded],        API version: 4
        SASL mechanism: PLAIN, best SSF: 0, supports setpass: no
        security flags: NO_ANONYMOUS
        features: WANT_CLIENT_FIRST|PROXY_AUTHENTICATION


Tim


On Mon, Jan 4, 2016 at 1:16 PM, Dan White <dwhite@cafedemocracy.org> wrote:
On 01/04/16 09:41 -0600, Timothy Keith wrote:
ldapwhoami -Y PLAIN -H ldap://182.19.136.42 -U testuser

produces :

ldap_sasl_interactive_bind_s: Unknown authentication method (-6)
       additional info: SASL(-4): no mechanism available: No worthy mechs
found

 Verify you have the sasl plain mechanism available on your local system with
saslpluginviewer/pluginviewer. On some systems it is contained in a separate
package from the libsasl2 glue library, e.g. libsasl2-modules.

--
Dan White