Abstract: This disclosure describes domain name system (DNS) caching techniques for providing integrated DNS caching services to multiple customers. For example, a virtual private network (VPN) device provides integrated DNS caching services to multiple customers even though each customer has a different corresponding VPN and may be serviced by a different DNS server. The VPN network device accesses the multiple, different DNS servers to retrieve correct IP addresses for the different customer VPNs, and internally stores the IP addresses in an integrated DNS cache in a manner that allows the IP addresses to be uniquely retrieved based on combinations of customer VPN identifiers and hostnames.

Abstract: A seal for a container having an outwardly directed annular rim. The seal includes a top panel with a central section and an annular lever section integrally joined to the central section by a living hinge. A side wall integrally depends from the outer periphery of the lever section and includes an inwardly directed concavity for receiving the rim edge. A continuous convexity below the concavity provides for a snap-mounting of the seal to the container rim and a vertical skirt below the convexity provides for a guide for mounting the seal. A fulcrum rib depends from the undersurface of the lever section and engages the container rim on a depression of the top panel at the hinge to swing the side wall away from the rim. Vent openings are provided through both the fulcrum rib and the convexity to maintain pressure release air flow as the seal is mounted and removed.

Abstract: A container lid engageable with the planar outer edge of a container mouth in overlying sealing relation to the mouth. The lid includes a depending peripheral sealing flange engaged with the container adjacent the mouth, and a top panel with a base surface having a pair of spaced fulcrums seated on the mouth edge. The top panel is divided by the fulcrums into a first major portion and a second minor portion. When the lid seals the container the under or base surface of the major portion parallels the mouth edge with the flange engaged with the container wall completely about the mouth. The minor portion of the top panel of the lid includes an under or base surface upwardly angled or offset from the mouth edge in the sealed position of the lid whereby pressure on the minor portion pivots the lid about the fulcrums and upwardly releases the major portion of the lid and corresponding portion of the flange from the container mouth.