Reset on specific sites
Likely causes
- - Target resets connections from datacenter-looking ranges
- - Protocol mismatch
Verified remedy
Use a dedicated static residential endpoint and confirm the protocol matches the tool.
Proxy troubleshooting
Fix err_connection_reset with proxy
Ranked causes, ordered diagnostics, and a verified remedy for err_connection_reset with proxy - ending with a final connection check.
Quick answer
Fix: Connection reset when using the proxy. Confirm endpoint values, test with curl through the endpoint, apply the matched remedy, then re-verify the exit IP is your assigned endpoint.
Exact symptom text
Causes ranked by likelihood
Ordered diagnostics
Final connection check
When this is the right fit
- Exact symptom text
- Causes ranked by likelihood
- Ordered diagnostics
Who this page is for
Ranked causes, ordered diagnostics, and a verified remedy for err_connection_reset with proxy - ending with a final connection check.
Fix: Connection reset when using the proxy. Confirm endpoint values, test with curl through the endpoint, apply the matched remedy, then re-verify the exit IP is your assigned endpoint.
Diagnosis tree
Reset on every site after time
Likely causes
- - Local network instability
- - Endpoint maintenance window
Verified remedy
Test the endpoint with curl from another network; keep a spare endpoint per ten profiles.
Final connection check
- 1Apply the matched remedy
- 2Test the endpoint with curl
- 3Repeat the original action
- 4Confirm the exit IP is the assigned endpoint
Working connection
The action completes and the exit IP matches the endpoint.
Broken connection
If curl also fails, the endpoint is unhealthy: swap to a spare.
Sources
Facts last reviewed 2026-09-01.
Prevent it recurring
Resets are transport-level: verify endpoint health with curl before changing application code.
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Frequently asked questions
How do I fix err_connection_reset with proxy?
Work the diagnosis tree top to bottom, confirm endpoint values, test with curl, then run the final connection check.
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