shadowsocks / shadowsocks/shadowsocks-rust

[Mobile/Russia] dns_probe_finished_nxdomain when visiting lm.facebook.com

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Dominant language
Rust
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Description

Shadowsocks version: 1.17.2 - 1.18.0 - 1.18.1 - 1.18.3
Client device: IPhone (iOS)
Server: Ubuntu 23 (Vultr and OVH)
Config:

{
          "server":"207.148.90.219",
          "mode":"tcp_and_udp",
          "server_port": 55837,
          "local_port": 1080,
          "password":"d0c222d5bd70ab16f4df9dd3caa70a54",
          "timeout": 60,
          "method":"chacha20-ietf-poly1305",
          "fast_open":true,
          "nameserver": "8.8.8.8"
 }

When I clicked on a link on Facebook, It returned an error screen. When I copied the link to the browser, It said dns_probe_finished_nxdomain. This issue only occurs on 4G network (OctopusNet Ltd), but not on Wifi (another ISP: Zelenaya Vladivostok Network).

It has no errors on the log. I tried to ping or traceroute to l.facebook.com or lm.facebook.com on my VPS, It still responded

image

image

image

https://l.facebook.com/l.php?u=https%3A%2F%2Fbaonga.com%2Fuav-va-ten-lua-nga-pha-huy-trung-tam-hau-can-cua-ukraine-o-odessa.html%3Ffbclid%3DIwZXh0bgNhZW0CMTAAAR1tMfKhQpRQwdEeWKPs6bkHYpaxsUCaL-9gWUmLBkJx_XlMKMjG37Abphg_aem_AUQ06mMNOEoxacNHH9qatPBT50R57-qs79wnQvKI_ufWHY6MrCxo5BXActIIHjclcK_JzP5U8l1Zu8KVBZyW6nK1&h=AT3TRiH86M5iyQke2wCwr_-mBUpipxOI9uTm1P_hdeM7MeI-k3DQT6VoQd1Ku8kHa3sUPQVmVLWBIRwos53RE_5Cf2L9R4k-Z846hAClXIowZKwbTG0EkCEwHxwKsRfu1Zea

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No source file, test, or entry point is identified. Start by reproducing the DNS failure with the reported iOS client, Ubuntu 23 server, 4G connection, Wi-Fi comparison, and nameserver configuration, then inspect the relevant DNS and proxy logs. Done would require isolating whether Shadowsocks causes the failure and defining a verified fix or reproduction boundary.

Written by the indexing model from the issue text.

Assessment

Tech stack
ios, rust, ubuntu
Domain
mobile-dev, networking
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
18/100

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