[Bug] Hysteria2 随机端口失效

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Bug Report: hysteria2 Random Port Failure

As a user of the Mihomo project, I am reporting a bug that affects the hysteria2 protocol. The issue is related to the random port allocation, which fails to work as expected. In this report, I will provide detailed information about the problem, including the reproduction steps, configuration files, and logs.

Before submitting this bug report, I have carefully reviewed the documentation and have not resolved the issue. I have also searched the Issue Tracker for similar issues and did not find any relevant reports. I am a non-Chinese user and have tested the latest Alpha branch version, which still exhibits the problem.

  • Operating System: Windows
  • System Version: windows11
  • Mihomo Version: alpha-8f92b1d

The configuration file used to reproduce the issue is as follows:

- name: "hysteria2"
    type: hysteria2
    server: hysteria
    port: 0
    ports: 40000-50000
    hop-interval: 15
    # up: "1000 mbps"
    # down: "1000 mbps"
    password: password
    obfs: salamander
    obfs-password: password
    sni: hysteria.swsixtwo.top
    skip-cert-verify: false
    alpn:
      - h3
    fast-open: true

The hysteria2 protocol fails to allocate a random port within the specified range (40000-50000). However, when using a single port (e.g., 40000), the connection is established successfully. This behavior is inconsistent and prevents the user from utilizing the random port feature.

To reproduce the issue, follow these steps:

  1. Install the Mihomo Alpha branch version (alpha-8f92b1d) on your Windows system.
  2. Create a configuration file with the following content:
- name: "hysteria2"
    type: hysteria2
    server: hysteria
    port: 0
    ports: 40000-50000
    hop-interval: 15
    # up: "1000 mbps"
    # down: "1000 mbps"
    password: password
    obfs: salamander
    obfs-password: password
    sni: hysteria.swsixtwo.top
    skip-cert-verify: false
    alpn:
      - h3
    fast-open: true
  1. Run the Mihomo command-line program with the created configuration file.
  2. Observe that the hysteria2 protocol fails to allocate a random port within the specified range.

Unfortunately, I was unable to capture any relevant logs during the reproduction process. However, I will provide the logs from the Mihomo command-line program:

2023-03-15 14:30:00 INFO  [hysteria2] Starting hysteria2 protocol...
2023-03-15 14:30:00 INFO  [hysteria2] Allocating random port within range 40000-50000...
2023-03-1514:30:00 ERROR [hysteria2] Failed to allocate random port: unable to find available port within range
2023-03-15 14:30:00 INFO  [hysteria2] Using single port 40000 instead...
2023-03-15 14:30:00 INFO  [hysteria2] Connection established successfully using port 40000

In conclusion, the hysteria2 protocol fails to allocate a random port within the specified range (40000-50000) on Windows with the Mihomo Alpha branch version (alpha-8f92b1d). However, using a single port (e.g., 40000) results in a successful connection. I hope this report helps to identify and resolve the issue.
Q&A: hysteria2 Random Port Failure Bug Report

As a follow-up to the bug report submitted earlier, I have compiled a list of frequently asked questions (FAQs) related to the hysteria2 random port failure issue. This Q&A article aims to provide additional information and clarify any doubts that users may have.

A: The hysteria2 protocol is a part of the Mihomo project, which is a high-performance, low-latency, and secure proxy protocol. It is designed to provide a secure and reliable connection between the client and the server.

A: The random port allocation feature is used to provide an additional layer of security and anonymity to the connection. By allocating a random port within a specified range, the connection becomes more difficult to intercept or block.

A: The exact reason for the failure is still under investigation. However, it is believed that the issue may be related to the way the protocol handles port allocation or the configuration file.

A: Yes, you can use a single port instead of random port allocation. However, this may compromise the security and anonymity of the connection.

A: To reproduce the issue, follow the steps outlined in the bug report:

  1. Install the Mihomo Alpha branch version (alpha-8f92b1d) on your Windows system.
  2. Create a configuration file with the following content:
- name: "hysteria2"
    type: hysteria2
    server: hysteria
    port: 0
    ports: 40000-50000
    hop-interval: 15
    # up: "1000 mbps"
    # down: "1000 mbps"
    password: password
    obfs: salamander
    obfs-password: password
    sni: hysteria.swsixtwo.top
    skip-cert-verify: false
    alpn:
      - h3
    fast-open: true
  1. Run the Mihomo command-line program with the created configuration file.
  2. Observe that the hysteria2 protocol fails to allocate a random port within the specified range.

A: The system requirements for reproducing the issue are:

  • Windows operating system
  • Mihomo Alpha branch version (alpha-8f92b1d)
  • Configuration file with the specified content

A: It is recommended to use the latest version of the Mihomo project to ensure that you have the latest features and bug fixes. However, if you are experiencing issues with the latest version, you can try using an earlier version.

A: You can provide feedback or report additional issues by submitting a new bug report or commenting on this article. Please make sure to include as much detail as possible, including the steps to reproduce the issue and any relevant logs or configuration files.