GNU Gatekeeperは、OpenH323をベースにしたフリーのH.323ゲートキーパです。Voice-over-IPネットワークを管理したり、シンボリック名を介してエンドポイント（例えば、Netmeeting）通信のために使うことができます。また、課金や他のアプリケーションのための外部インタフェースもあります。いくつかのUnixバージョン（LinuxとSolarisを含む）及びWindows上で動作します。
Full support for IPv6 and gatekeeper-to-gatekeeper traversal zones are the most important features. RTP multiplexing allows all calls to work on a total of 2 sockets, H.235 password support was improved, and firewalls can now be notified when new ports need to be opened.
Full support for IPv6 and gatekeeper-to-gatekeeper traversal zones are the most important features. In addition, there are a number of smaller new features and bugfixes.
This release has a number of new features as well as a few important bug fixes. The most important new features are working LDAP support (H.350), better checking of the configuration file, and SSH support for the status port. The most important bug fix is a rewrite of the H.460.19 port detection logic.
