h323-proxy and gk-proxy are the proxy daemons for a set of multimedia communication protocols called H.323 protocols. Kernun UTM supports them only for backward compatibility, because this protocol family is now widely replaced by the SIP protocols (see Figure 5.35, “SIP Proxy” below). Therefore, this manual does not cover this topic. For more information, see h323-proxy(8), h323-proxy(5), gk-proxy(8) and gk-proxy(5).