Networking issues on Windows — page 2
Issues the maintainers labelled both platform:windows and area:networking.
129 issues · 37 open · 92 resolved (71%) · first seen Feb 26, 2026
Is this getting better or worse?
This class of problem is still growing. 59 new reports in the last 90 days vs 45 in the 90 before — +31%. The open backlog peaked at 37 in 2026-10 and sits at 37 today.
Derived by counting each matching issue from its creation date until it closed. First-party
computation over the anthropics/claude-code tracker — the trend is not published
anywhere upstream.
Which builds report this
90 of these reports name the Claude Code build they were running, spanning 65 releases. Heaviest reporters:
- Claude Code v2.1.233
- Claude Code v2.1.150
- Claude Code v2.1.215
- Claude Code v2.1.227
- Claude Code v2.1.119
- Claude Code v2.1.81
- Claude Code v2.1.266
- Claude Code v2.1.246
Report volume, not a defect count: an issue can mention a build without that build having caused the failure. Versions come from the version string in the bug-report template, matched against real published tags.
Do these get fixed?
Median time to close is 33 days across 92 closures. Of the 92 closures with a recorded reason, 15% were closed as completed and 78 as not-planned or duplicate. The most recent completed fix landed in 2026-10.
Workarounds reported by the community
31 of these issues post a workaround someone says worked. The highest-engagement ones:
- [Feature] Cowork desktop app: support host proxy settings (HTTP/HTTPS/NTLM) for enterprise network environments
- I published a related unofficial Windows Desktop workaround that may help one adjacent case, but I want to be careful about scope: Latest release ZIP: This is not a full fix for Cowork VM egress, NTLM proxy support, or e…
Found in the thread of #45994 · still open - [BUG] Allow network egress - All domains' setting not reflected in session proxy JWT
- …o this is not a tool-layer issue and there is no in-sandbox workaround. For completeness, the form: The denial comes from an upstream gateway : Direct CONNECT against the local proxy: So the local proxy relays and the ga…
Found in the thread of #34690 · still open - [BUG] Cowork Windows: API unreachable from VM behind corporate NTLM proxy (cntlm)
- …h the host's network stack (which already has proxy access) Workaround Using Claude Code CLI directly on Windows, which runs natively and uses the system proxy without issues. Related Issues - 26258 — Similar API unreach…
Found in the description of #29367 · still open - [FEATURE] Remote Control: failure-resistant session model — survive hibernation, auto-reattach, mobile-side recovery
- …The reconnect path exists in embryo; it just doesn't work. Workaround we settled on (mentioned in case it helps others running server workers): we no longer restart the worker on every patch release — the new CLI is dow…
Found in the thread of #78784 · still open - Voice mode fails with 'Voice connection failed' — Cloudflare challenge blocks WebSocket to claude.ai
- …oudflare challenge, similar to how handles CLI connections. Workaround Using a VPN changes the IP and bypasses the Cloudflare challenge, making voice mode work. This confirms the issue is IP/region-based Cloudflare chall…
Found in the description of #34414 · resolved
Excerpts are quoted from the linked issue so you can judge relevance before opening it. Threads that only ask for a workaround, or report that there is none, are excluded. These are community suggestions, not official guidance from Anthropic — read the full thread before applying one.
Matching issues 101–129
Ranked by community engagement (reactions weighted over comments).
- [BUG] Blocked Datadog telemetry causes massive DNS retry amplification
- [BUG] Claude Code SSE stream repeatedly resets (ECONNRESET) on sustained connections only — local network/security software exhaustively ruled out
- Remote Control silently self-disables after 3 transient failures and never recovers (per-session init latch + persisted OAuth dead-token backoff)
- [BUG] Desktop SSH remote: client never sends publickey signature after "Postponed publickey" (regression in 1.21459.3; system OpenSSH with identical key/host works)
- [BUG] ERR_BAD_REQUEST on startup persists across MSIX and npm installs — confirmed not network/proxy/TLS/DNS related
- [BUG] Unable to connect to API (ConnectionRefused) after uninstalling MCP tools — network and Node.js confirmed healthy
- Desktop dispatch bridge fails behind Norton SSL inspection - ignores NODE_EXTRA_CA_CERTS, CLAUDE_CODE_CERT_STORE, and --use-system-ca
- Remote Control: messages sent from phone/web show as sent but never arrive in the CLI session
- [BUG] Remote Control reports "/rc active" while its input channel is silently dead under local TLS interception (Norton 360 SSL scanning)
- [BUG] Remote Control: Messages from mobile app not reaching PC
- [BUG] This task didn't load properly
- Desktop app (Windows): repeated 'API Error: Connection dropped (ECONNRESET)' across multiple sessions, incl. short ones
- Session gets stuck in a retry loop on a very slow upload connection (Claude Desktop, Windows)
- Claude Code CLI "Connection refused" on Windows behind corporate proxy (CNTLM)
- [BUG] ✻ Connection refused — a firewall or proxy may be blocking it (ECONNREFUSED)
- [BUG] Desktop app does not respect NODE_EXTRA_CA_CERTS/HTTPS_PROXY (SSL interception environment)
- [BUG] ECONNRESET "Connection dropped" with claude-fable-5-1 at normal effort; works at MAX
- [BUG] Remote Control fails to connect for existing local session (stuck at "connecting" / times out)
- [Bug] Remote control connection fails in existing Claude Code sessions
- [BUG] Remote Control fails to connect from mobile (iOS app + Safari) and desktop app fails to reconnect to other local sessions on the same machine — "Can't connect to your computer" despite machine being awake and online
- [BUG] Windows: undock (Ethernet->Wi-Fi interface swap) ends the in-flight turn with no retry, silently killing background sessions
- [BUG] Windows: ECONNRESET on first Claude Code prompt despite working HTTPS
- / bug report
- [BUG] Dispatch shows "desktop appears offline" behind TLS-inspecting AV — sessions-bridge Node transport does not use the system CA store
- [BUG] Subscription auth (Pro/Max) ignores ANTHROPIC_BASE_URL — requests never reach custom proxy (LiteLLM)
- [Bug] Silent connection drop between mobile app and Claude Code CLI despite active status indication
- [Bug] ECONNRESET on streaming requests with bundled Node v26.3.0
- [BUG] Remote session hangs on "Starting session…" — server logs connection, then 50–118s of silence, then SIGTERM and reconnect loop
- [BUG] Embedded browser pane does not use the OS VPN / internal DNS