Contents

Copyright Notice  Important Information  VoIP Administration Guide  Securing Voice Over IP  VoIP Security Deployments  VoIP Technology and Standards  Session Initiated Protocol (SIP)  MGCP-Based VoIP  H.323-Based VoIP     Introduction to H.323     H.323 Specific Services     Supported H.323 Deployments and NAT     Important Information about Creating H.323 Security Rules        Sample H.323 Rules for an Endpoint-to-Endpoint Topology        Sample H.323 Rules for a Gatekeeper-to-Gatekeeper (or H.323 Gateway) Topology        Sample H.323 Rules for a Gatekeeper (or H.323 Gateway) in an External Network        Defining H.323 Rules for a Gatekeeper in DMZ Topology  SCCP-Based VoIP  Configuring VoIP for Check Point Security Gateways  Check Point Kernel Tables  Working with Kernel Parameters on Security Gateway  Kernel Debug on Security Gateway