Syncrepl TLS certificate verification - configurable

[Siddhartha Jain <sjain@silverspringnet.com>]

Hi,

I have setup replication between two primary servers to use TLS.

The config says:
{0}rid=101 provider=ldap://pldap01.xyz.net binddn="cn=Manager,dc=xyz,dc=net" bindmethod=simple credentials=secret searchbase="dc=xyz,dc=net" type=refreshOnly interval=00:00:00:10 retry="5 5 300 5" timeout=1 starttls=yes tls_cert=/etc/openldap/cacerts/newcert.pem tls_cacert=/etc/openldap/cacerts/cacert.pem tls_key=/etc/openldap/cacerts/newreq.pem
{1}rid=102 provider=ldap://pldap02.xyz.net binddn="cn=Manager,dc=xyz,dc=net" bindmethod=simple credentials=secret searchbase="dc=xyz,dc=net" type=refreshOnly interval=00:00:00:10 retry="5 5 300 5" timeout=1 starttls=yes tls_cert=/etc/openldap/cacerts/newcert.pem tls_cacert=/etc/openldap/cacerts/cacert.pem tls_key=/etc/openldap/cacerts/newreq.pem


Replication works alright but logs show these lines on pldap01:
Apr 22 03:47:20 pldap01 slapd[3451]: conn=1089 fd=22 TLS established tls_ssf=256 ssf=256
Apr 22 03:47:20 pldap01 slapd[3451]: slap_client_connect: URI=ldap://pldap02.xyz.net Warning, ldap_start_tls failed (-11)

And, this on pldap02:
Apr 22 03:47:40 pldap02 slapd[2564]: conn=1096 fd=26 TLS established tls_ssf=256 ssf=256
Apr 22 03:47:51 pldap02 slapd[2564]: slap_client_connect: URI=ldap://pldap01.xyz.net Warning, ldap_start_tls failed (-11)


To be fair, the certificates are self-signed and don't match the DN but I am assuming that "starttls=yes" forces TLS and the consumers cannot default to plaintext. Right? If yes, does this mean that in syncrepl, tls use is hardcoded to verify certificates and fall back to non-verified TLS session if verification fails? Or, is this configurable meaning can I enforce verification (preferable in production)?



Thanks,

- Siddhartha