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Fix n8n "ECONNREFUSED 127.0.0.1" in Docker: localhost, host.docker.internal & SSRF
Fix "connect ECONNREFUSED 127.0.0.1" in n8n's HTTP Request node when n8n runs in Docker: localhost vs host.docker.internal, the Linux host-gateway fix, 0.0.0.0 binding, and n8n's SSRF block.
n8nDockerTroubleshooting
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