[Bug]: Predefined traffic sets default route on macOS

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Avaliação

Dificuldade
4/5
Tempo estimado
3-5 dias
Facilidade para iniciantes
52/100
Tipo de issue
Bug
Clareza
Razoavelmente clara
Status de atividade
Ativa
Stack de tecnologia
rust
Domínio
networking

Direção de pesquisa

Start by tracing how the macOS client configures routes when connecting with predefined traffic; the issue identifies netstat -rn as the way to observe the result but names no source files or tests. Compare the routes before and after connecting and investigate why a default route appears. Done when predefined traffic installs only the location’s configured routes and leaves the default route unchanged.

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Descrição

bug
Summary

When choosing predefined traffic and connecting to the VPN, a default route is set (visible via netstat -rn).
We assumed that predefined traffic only routes the subnets defined in our location. A customer who relies on Defguard can't work properly, because his other active WireGuard tunnels can't function while Defguard hijacks the traffic.

Steps to reproduce
  1. Check routes via netstat -rn (especially default routes).
  2. Connect via predefined traffic.
  3. Check routes via netstat -rn again.
  4. There is now a default route on the Defguard interface.
Expected behavior

No default route is set, only the routes defined in the location for predefined traffic.

Workaround by a customer: Create a VM on macOS, install the Defguard client in it and use the VM as a router. Only allow the routes that are required for using Defguard.

Actual behavior

A default route is set, which prevents customers and potentially colleagues from using multiple VPNs at the same time as Defguard.

Defguard version

All version on the latest 2.1 stable build

Environment details

macOS (any tested version after 2024)

Deployment / install method

Docker / Docker Compose

Relevant logs / output

Relevant configuration (redacted)

Linguagem predominante
Rust
Estrelas
373
Forks
42
Merge médio
21h 18min
PRs com merge (30d)
50

Preparar o ambiente

  • Sem Dockerfile nem arquivo Docker Compose
  • Tem um modelo de pull request
  • Sem guia de contribuição

Primeiros passos

  1. Leia a issue inteira e depois o guia de contribuição do projeto.
  2. Comente na issue dizendo que vai assumir — evita que duas pessoas façam o mesmo trabalho.
  3. Faça um fork do repositório e trabalhe em uma branch.
  4. Abra um pull request que referencie o número da issue.

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