Types of Filters
The NETServer supports the following types of packet filters:
∙Input and output filters; packet filters can be created to control either inbound or outbound data packets
∙Source and destination address filtering; a packet filter can permit or deny access based on the IP address of the source and/or destination
∙Protocol filtering; inbound or outbound network traffic can be evaluated based on the protocol
∙Source and destination port filtering; a packet filter can control what services local or remote users can access
∙Established session filtering; a packet filter can permit users to connect with a remote network without letting remote users have access to the local network (or vice versa)
Packet Filters and the NETServer
Once created, a packet filter can be designated for use in any of the following applications:
∙Filter packets exchanged with the local network (Input Filter and Output Filter fields of LAN Port Configuration)
∙Control which hosts all login users can access (Input Filter field of Port Parameters window for user login ports);
∙Control which hosts a specific login user can access (Access Filter field of the Login User Parameters window)
∙Filter packets passing through a hardwired connection (Input Filter and Output Filter fields of the Port Parameters window for hardwired ports)
∙Filter packets exchanged with a specific network user (Input and Output Filter fields of Network User Configuration)
∙Filter packets exchanged with a specific location (Input Filter and Output Filter fields of the Location Table)
