http://dacxzjk3kq5mmepbdd3ai2ifynlzxsnpl2cnkfhridqfywihrfftapid.onion/help/administration/auth/ldap/index.md
Set up LDAP user filter
To limit all GitLab access to a subset of the LDAP users on your LDAP server, first narrow the
configured base . However, to further filter users if
necessary, you can set up an LDAP user filter. The filter must comply with RFC 4515 .