IP Library Granted Patent US 9,166,873
Granted Patent B2
US 9,166,873 · App. 13/168,606 · Granted Oct 20, 2015

Method and apparatus for a client connection manager

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Quick Facts
Patent No.
US 9,166,873
App. No.
13/168,606
Granted
Oct 20, 2015
Kind
B2
Abstract

A method and apparatus for a connection manager have been disclosed. By providing for persistent connections with clients, the connection manager allows for servers to communicate with clients, which would otherwise be inaccessible.

Claims (5)

1. A method comprising:

establishing from behind a firewall a cached persistent connection that supports TCP;

maintaining the connection from behind the firewall via a keep-alive signal in an active state, or a non-active state selected from the group consisting of inactive, and sleep;

transitioning an active connection to the group consisting of inactive, and sleep based upon a criteria selected from the group consisting of server activity, time, performance, and explicit transition control; and

when said maintaining in said active state no data is sent to a server, and a timestamp of said keep-alive signal is not reset and wherein said keep-alive signal is an empty TCP segment.

Assignments (3)
RELEASE OF SECURITY INTEREST Recorded Dec 8, 2023
From: BMO BANK N.A., AS ADMINISTRATIVE AGENT
To: DIGI INTERNATIONAL INC.
Reel/Frame 065835/0205 →
SECURITY INTEREST Recorded Dec 8, 2023
From: DIGI INTERNATIONAL INC.
To: BMO BANK N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 065836/0981 →
SECURITY INTEREST Recorded Dec 19, 2019
From: DIGI INTERNATIONAL INC.
To: BMO HARRIS BANK N.A.
Reel/Frame 051370/0023 →