Names a port group — a set of ports that can be associated with a TCP Redirect Group to control which destination ports get redirected. This is the port-based counterpart to cssgTcpRedirNetworkMapGrpName, letting a redirect rule be scoped to specific service ports, like just SMTP's port 25, rather than to whole destination networks. An operator would create a port group named 'mail-ports' via cssgTcpRedirPortMapGrpName containing ports 25 and 587, so the SMTP redirect group only intercepts mail traffic and leaves web or DNS on the same hosts untouched.