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fetch fails with EHOSTUNREACH for non-localhost addresses (Node.js v24.11.0 undici bug) #33757
Description
Description
Issue: Node.js fetch (undici) fails with EHOSTUNREACH for local network addresses
Title: fetch fails with EHOSTUNREACH for non-localhost addresses (Node.js v24.11.0 undici bug)
Body:
Environment
OpenCode version: 1.17.10
Node.js: v24.11.0
OS: macOS (Apple Silicon)
Provider: Custom Ollama server at http://192.168.1.250:11434/
Description
The AI SDK's HTTP calls fail with EHOSTUNREACH when connecting to a non-localhost address, even though the server is reachable via curl and Node.js require('http').
Steps to Reproduce
Configure a custom provider pointing to a local network address (e.g. http://192.168.1.250:11434/v1)
Run opencode
Select the custom provider model
Send a message
Expected
Connection succeeds and model responds.
Actual
Hangs indefinitely or fails with EHOSTUNREACH. Root cause: Node.js v24.11.0's built-in fetch (undici) has a DNS/networking bug affecting non-localhost addresses. require('http') works fine to the same address.
Workaround
None available within OpenCode. Using NODE_OPTIONS="--dns-result-order=ipv4first" does not resolve it for the AI SDK's fetch calls.
Plugins
No response
OpenCode version
1.17.10
Steps to reproduce
No response
Screenshot and/or share link
No response
Operating System
No response
Terminal
No response
Activity
github-actions commentedon Jun 25, 2026
This issue might be a duplicate of existing issues. Please check:
192.168.x.xconnections #25908: Desktop app cannot reach LAN IP addresses - EHOSTUNREACH on all192.168.x.xconnections (same error, same macOS + custom provider setup)If your issue is distinct (e.g. specifically triggered by Node.js v24.11.0 rather than VPN interfaces or desktop app sandboxing), please add details clarifying the difference.
vasiliy-t commentedon Aug 10, 2026
I'm running OpenCode Desktop on macOS and trying to connect to a self-hosted model (Qwen running on a local IP like 192.168.x.x)
In my case fix was to allow opencode to access local network: Open System Settings on your Mac. Navigate to Privacy & Security > Local Network. Find OpenCode in the list. Toggle the switch to ON. Restart OpenCode Desktop.
github-actions commentedon Oct 11, 2026
To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.