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troubleshootingAugust 17, 2026•6 min read•RTSPLink Engineering

Fixing "Connection Refused" and "401 Unauthorized" in RTSP Streams

Comprehensive troubleshooting steps to resolve authentication failures, port blocks, and socket timeouts.

#401 Unauthorized#Connection Refused#Troubleshooting#Authentication
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#1Step 1: Check Digest vs Basic Authentication

Many modern IP cameras (Hikvision, Dahua, Axis) disable Basic Authentication by default and require Digest Auth. Ensure your client library (e.g. FFmpeg, OpenCV) is compiled with libavformat capable of HTTP/RTSP Digest handshakes.

#2Step 2: Verify Port 554 Reachability

Test TCP socket connectivity from your terminal:

Testing TCP Port 554
nc -zv 192.168.1.64 554

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