Firewall apparatus and method of controlling network data packet traffic between internal and external networks
CA 2336113 A1 · Owner: Brodnik, Andrej · Inventors: Johansson, Olof; Carlsson, Svante; Sundstrom, Mikael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A firewall (3) for controlling network data packet traffic between internal and external networks (1, 5, 4), comprising filtering means selecting from a total set of rules, in dependence of the contents in data fields of a data packet being transmitted between said networks a rule applicable to the data , packet in order to block said packet or forward said packet through the firewall (3). A 2-dimensional address lookup means (8) performs a 2dimensional lookup of the source and destination addresses of the packet in a set of address prefixes, each prefix having a subset of rules of the total set of rules, in order to find a prefix, via its representation associated with , said source …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 2, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.