US 12,425,486 B2
Call forwarder for air-gapped networks
Narasimha Karumanchi, Hyderabad (IN); Manoj Kumar Ampalam, Suwanee, GA (US); Krupesh Satishkumar Dhruva, Hyderabad (IN); and Chandra Mouli Addaguduru, Bangalore (IN)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jan. 26, 2023, as Appl. No. 18/101,929.
Prior Publication US 2024/0259478 A1, Aug. 1, 2024
Int. Cl. H04L 67/56 (2022.01); H04L 47/78 (2022.01)
CPC H04L 67/56 (2022.05) [H04L 47/782 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer implemented method comprising:
generating a first call to an external resource by a first resource in a low layer of a multi-layer network of resources;
forwarding the first call though successive multiple layers via a call forwarder in each layer to an edge proxy in each adjacent higher layer forming a transaction control protocol (TCP) tunnel between the first resource and the external resource, wherein each edge proxy has a transport layer security (TLS) connection with each adjacent layer edge proxy using dummy self-signed certificates; and
establishing a connection to the external resource via a top layer having direct external network access without using domain name servers in layers lower than the top layer.