I've been trying to set up a small surveilance solution for our home, using a newly-acquired QNAP TS253 NAS as the NVR. I bought some cameras from Amazon - 2 Hikvisions and one SV3C. I've only got the SV3C one set up so far, and decided to run a port scan on it to see if there were any back doors open. Here is what I found. The camers is responding on the following ports: 80 (HTTP) 554 (RTSP) 1018 (reserved according to IANA - may be used for ipcserver 1235 (mosaicsyssvc1 - seems to be used for some RAM optimisation?) 8840 (unassigned) 42608 (unassigned) I'm quite alarmed. No way all these ports should be open. The only one I know of that's legitimate is 1018. Before I send the camera back, does anyone thing this looks correct? I've contacted SV3C and they say it's all fine, and there's no new firmware.