NatTypeTester

# NatTypeTester Package | NuGet -|- Stun.Net | [](https://www.nuget.org/packages/Stun.Net/) ## Architecture ```mermaid flowchart TD Console["Console"] --> Application["Application"] Desktop["Desktop"] --> Views["Views"] Android["Android"] --> Views Views --> Application Views --> Configuration["Configuration"] Views --> ViewModels["ViewModels"] Application --> ApplicationContracts["Application.Contracts"] Application --> Domain["Domain"] Configuration --> Domain ViewModels --> ApplicationContracts ViewModels --> Domain ApplicationContracts --> DomainShared["Domain.Shared"] Domain --> DomainShared ``` ## RFC - [RFC 3489](https://datatracker.ietf.org/doc/html/rfc3489) - [RFC 5780](https://datatracker.ietf.org/doc/html/rfc5780) - [RFC 8489](https://datatracker.ietf.org/doc/html/rfc8489) ## Internet Protocol - [x] IPv4 - [x] IPv6 ## Transmission Protocol - [x] UDP - [x] TCP - [x] TLS-over-TCP - [x] DTLS-over-UDP ## RFC3489 > The STUN server has two IP addresses (`IP1`, `IP2`), each listening on two ports (`Port1`, `Port2`). > *Send to X, request from Y* means the request is sent to endpoint `X`, asking the server to reply from endpoint `Y`. ``` … ``` ## RFC5389 > The STUN server has two IP addresses (`IP1`, `IP2`), each listening on two ports (`Port1`, `Port2`). > *Send to X, request from Y* means the request is sent to endpoint `X`, asking the server to reply from endpoint `Y`. ### Binding Test Checking for UDP Connectivity with the STUN Server ```mermaid flowchart TD T1["Send to IP1:Port1
request from IP1:Port1"] --> R1{"Received?"} R1 -->|No| B1["Fail"]:::bad R1 -->|Yes| R2{"Received
MappedEndpoint?"} R2 -->|No| B2["Unsupported Server"]:::bad R2 -->|Yes| G1["Success"]:::good classDef bad fill:#f4756b,stroke:#c0392b,color:#000 classDef good fill:#7fe57f,stroke:#38761d,color:#000 ``` ### Mapping Behavior Determining NAT Mapping Behavior ``` … ``` ### Filtering Behavior Determining NAT Filtering Behavior ``` … ``` ### Combining Tests ``` … ```