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Check when the camera went offline in the Health tab.
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If you have more than 1 camera at the same site - check if other cameras are online and if they went offline temporarily during the same time.
Direct IP camera
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Router changed it’s IP address - all cameras from the same location should be down.
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Update the IP address for the camera in the Settings->Cameras->Connection tab.
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Use DDNS (like no-ip.com) instead of IP address.
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Router may reset it’s port forwarding table, this happens often after router’s f/w upgrade or reset.
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Configure port forwarding again, using the same ports.
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Uplink Camera
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Camera can’t reach DNS server
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Configure an extra DNS server on the camera, it could be for example 8.8.8.8
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Uplink plug-in stopped working (unlikely)
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Log-in to the camera in the local network and check that the plug-in is installed and running.
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Download logs from the camera
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Reboot the camera
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