Abstract: A bastion host is provided for a local area network (LAN). The bastion host processes packets to be transferred from the LAN to a wide area network (WAN). The bastion host intercepts packets originating from a host on the LAN, the packets being destined for transmission over the WAN, extracts bits from predetermined fields from each packet header to form one or more blocks for translation, masks bits from the one or more blocks that vary rapidly packet to packet, applies a predetermined encryption algorithm to translate the one or more blocks after masking; and reinserts bits from the translated block back into the packet header.

Abstract: Using intelligent network processing, call notification allows a subscriber to determine the name and telephone number of one or more numbers of recent parties to call the subscriber. An incoming call to the subscriber's number activates a terminating attempt type trigger in the central office serving the subscriber. The trigger causes communication between that office and a service control point (SCP). Under instructions from the SCP, the central office indicates a disposition event regarding the call, e.g., whether the line was busy or there was no answer. If the subscriber's line is busy or does not answer, the SCP records at least the telephone number of the caller and the time and date of the call. Later, the subscriber dials a feature code, and the SCP instructs the central office to route the call to an intelligent peripheral (IP).