The NuFW program is an extensive firewall that can filter every connection on the user’s rights and operating system. It uses an ldap server to check the permissions and Netfilter to apply the filtering technique. For more information about NuFW, we refer you to this page. Version 1.0.18 is now available in the stable branch with the following announcement:
NuFW 1.0.18, bug fix release
This new release fixes a bug related to the maximum number of clients authorized to connect to the gateway. The number of already connected clients was badly computed and this could in some cases prevent legitimate clients from connecting.
1.0.18 also brings a new option “nuauth_tls_auth_by_cert” which activates authentication by certificate on the server (thanks to Julian Reich for pointing that old scheme was not enough).