Secure DNS Routing via Encoded Hostnames
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Solution Overview
Problem
Existing DNS systems lack security and efficiency in routing requests to private media servers, as they often require maintaining databases that map IP addresses to hostnames, which can be insecure and inefficient, especially when dealing with private networks that block incoming requests.
Innovation Solution
Implementing a method and system for secure DNS routing that generates a secure signature using an IP address, encodes it into a character string, and constructs a hostname with a designated domain name, allowing the domain name server to validate and decode the IP address without a database, ensuring secure and efficient routing by authenticating authorized devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a database mapping IP addresses to hostnames is maintained, then DNS routing can be performed, but security is compromised and efficiency decreases
Solution Approach 1:
The patent extracts the IP address information from a centralized database and embeds it directly into the hostname structure. The encoded IP address becomes part of the hostname itself (e.g., hostname contains encoded IP segments), allowing the DNS server to retrieve IP addresses without querying or maintaining a separate mapping database, thereby eliminating the security vulnerability and complexity of database maintenance.
Solution Approach 2:
The hostname structure is designed to contain all necessary routing information within itself. The encoded IP address embedded in the hostname enables the DNS server to self-serve by decoding the IP address directly from the hostname without external database assistance, making the system autonomous and eliminating dependency on vulnerable centralized databases.
2Reliability
If incoming requests are blocked in private networks, then network security is improved, but DNS routing functionality is lost
Solution Approach 1:
Instead of allowing incoming DNS requests to reach private media servers (which would compromise network security), the patent inverts the approach by having the DNS server perform all routing operations locally. The DNS server decodes IP addresses from hostnames and routes requests without forwarding them to private networks, enabling DNS functionality while maintaining the blocked-incoming-requests security posture.
Solution Approach 2:
The DNS server acts as an intermediary that resolves hostnames to IP addresses locally without requiring communication with private media servers. By performing decoding and routing operations at the DNS server level, the system enables DNS functionality while maintaining the security barrier that blocks direct incoming requests to private networks.
3Device complexity
If IP addresses are encoded in hostnames, then database requirements are eliminated, but hostname validation complexity increases
Solution Approach 1:
The IP address encoding scheme is designed with predefined segmentation rules that divide the IP address into identifiable segments within the hostname. This preliminary structuring enables the DNS server to systematically decode the IP address by recognizing and extracting specific segments according to established patterns, reducing the complexity of validation compared to arbitrary encoding schemes.
Data Source
AI summary
Various arrangements for performing secure domain name system (DNS) routing are presented. A secure signature may be generated using an internet protocol (IP) address of an authorized device. An encoded character string may be generated that comprises the IP address. The domain name server may receive a request for an IP address mapped to the hostname. The hostname may be validated using the secure signature. The IP address of the authorized device may be decoded from the encoded character string at least partially in response to the hostname being validated by the domain name server. The IP address decoded from the encoded character string may be transmitted at least partially based on the hostname being validated and the request for the IP address.