Quick Note: Disable SSLv3 in OpenLDAP with GnuTLS

on October 15, 2014 in Linux with 1 comment by

Due to the SSL POODLE vulnerability, it is best to remove support for the outdated SSLv3 protocol.  As OpenLDAP with GnuTLS is a beast of its own, here’s the quick change to remove SSLv3 support:

cat > nossl.ldif <<EOF
dn: cn=config
changetype: modify
add: olcTLSCipherSuite
olcTLSCipherSuite: SECURE256:-VERS-SSL3.0


ldapmodify -Y EXTERNAL -H ldapi:/// -f nossl.ldif

And we’re done! Obviously, if you already have olcTLSCipgerSuite, then use “replace” instead of “add”.

A quick test:

~# gnutls-cli-debug -p 636
Resolving ''...
Connecting to ''...
Checking for SSL 3.0 support... no
Checking whether %COMPAT is required... no
Checking for TLS 1.0 support... yes
Checking for TLS 1.1 support... yes
Checking fallback from TLS 1.1 to... N/A
Checking for TLS 1.2 support... yes

One comment

  1. posted on Dec 17, 2014 at 10:00 AM  |  reply

    Thanks a lot, it works perfectly :)

Join the discussion

Your email address will not be published. Required fields are marked *