Wireless Access Point SSID-VPN Forwarding Without VLAN Routing

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Solution Overview

Problem

Existing methods for routing packets from wireless access point routers to virtual private networks (VPNs) involve creating VLANs or assigning specific subnets, which can increase CPU and memory load and result in packet drops when the VPN is not operating.

Innovation Solution

A method where a SSID is associated with a VPN profile, enabling packet forwarding through the VPN when established and disabling the SSID when the VPN is not, eliminating the need for VLANs and subnet assignments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If VLANs or subnet assignments are used to route packets to VPN, then packet routing control is achieved, but CPU and memory load increases

Engineering Contradiction:

Improvepacket routing controlVSAvoidCPU and memory load

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the SSID configuration and VPN routing rules into a single integrated structure. When a SSID is configured with VPN parameters, the system automatically creates routing rules associating that SSID with the VPN, eliminating the need for separate VLAN configurations and independent routing rule creations, thereby reducing CPU and memory overhead

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The SSID configuration serves multiple functions simultaneously: it defines wireless network identity, establishes VPN routing association, and configures packet forwarding behavior. This multi-functional approach replaces the traditional separate VLAN and routing rule configurations, reducing system complexity while maintaining routing control

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If separate routing rules are created for VPN, then packet forwarding control is achieved, but system resources are consumed

Engineering Contradiction:

Improvepacket forwarding controlVSAvoidsystem resources

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines SSID configuration with VPN routing parameters into a unified data structure. The system stores this combined information in a single table, eliminating the need for separate routing rule entries and reducing memory consumption while maintaining precise packet forwarding control

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If VPN is not established, then routing flexibility is maintained, but packets are dropped or not routed correctly

Engineering Contradiction:

Improverouting flexibilityVSAvoidpacket routing reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent performs preliminary validation to ensure the VPN is properly established before enabling the SSID and its associated routing rules. This preliminary check prevents the system from attempting to forward packets through an unavailable VPN, eliminating packet drops while maintaining routing flexibility for future VPN connections

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12381759B2Methods and system for forwarding packets through a virtual private network

Publication Date: 2025.08.05 PISMO LABS TECH

AI summary

The present invention discloses methods and systems for forward packets received from a SSID at a wireless access point to a VPN. The SSID and VPN are associated. The VPN is created according to a VPN profile. When the VPN is established, the SSID is enabled. When the VPN is not established, the SSID is disabled.