I am now using Reolink RLC-423. It's my first time to use a security camera. It's a PTZ camera. For now, it works well. I installed it to monitor my yard. If you have problems on using this camera, I can share my experience with you.
root@2106D:~# tcpdump -XX -vv -i br0 host 192.168.1.71 and port 32100
tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:13:56.238497 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 76)
192.168.1.71.21523 > ec2-54-86-23-37.compute-1.amazonaws.com.32100: [udp sum ok] UDP, length 48
0x0000: 14dd a988 b570 d8eb 97a0 8908 0800 4500 .....p........E.
0x0010: 004c 0000 4000 4011 2b37 c0a8 0147 3656 .L..@.@.+7...G6V
0x0020: 1725 5413 7d64 0038 b997 f112 002c 2679 .%T.}d.8.....,&y
0x0030: 34c4 78ae b288 42ef c24b 5a0a 14ac 113a 4.x...B..KZ....:
0x0040: 8618 244b 5915 4802 351c 7fc7 4e9a dc0f ..$KY.H.5...N...
0x0050: 8cae 8264 b2a0 63a7 17c1 ...d..c...
10:13:56.239276 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 76)
192.168.1.71.21523 > ec2-54-72-248-104.eu-west-1.compute.amazonaws.com.32100: [udp sum ok] UDP, length 48
0x0000: 14dd a988 b570 d8eb 97a0 8908 0800 4500 .....p........E.
0x0010: 004c 0000 4000 4011 4a01 c0a8 0147 3648 .L..@.@.J....G6H
0x0020: f868 5413 7d64 0038 d861 f112 002c 2679 .hT.}d.8.a...,&y
0x0030: 34c4 78ae b288 42ef c24b 5a0a 14ac 113a 4.x...B..KZ....:
0x0040: 8618 244b 5915 4802 351c 7fc7 4e9a dc0f ..$KY.H.5...N...
0x0050: 8cae 8264 b2a0 63a7 17c1 ...d..c...
10:13:56.239481 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 76)
192.168.1.71.21523 > ec2-54-179-151-251.ap-southeast-1.compute.amazonaws.com.32100: [udp sum ok] UDP, length 48
0x0000: 14dd a988 b570 d8eb 97a0 8908 0800 4500 .....p........E.
0x0010: 004c 0000 4000 4011 aa03 c0a8 0147 36b3 .L..@.@......G6.
0x0020: 97fb 5413 7d64 0038 3864 f112 002c 2679 ..T.}d.88d...,&y
0x0030: 34c4 78ae b288 42ef c24b 5a0a 14ac 113a 4.x...B..KZ....:
0x0040: 8618 244b 5915 4802 351c 7fc7 4e9a dc0f ..$KY.H.5...N...
0x0050: 8cae 8264 b2a0 63a7 17c1 ...d..c...
10:13:56.278193 IP (tos 0x0, ttl 45, id 64776, offset 0, flags [DF], proto UDP (17), length 40)
ec2-54-86-23-37.compute-1.amazonaws.com.32100 > 192.168.1.71.21523: [udp sum ok] UDP, length 12
0x0000: d8eb 97a0 8908 14dd a988 b570 0800 4500 ...........p..E.
0x0010: 0028 fd08 4000 2d11 4152 3656 1725 c0a8 .(..@.-.AR6V.%..
0x0020: 0147 7d64 5413 0014 ae1b f113 0008 7e36 .G}dT.........~6
0x0030: f246 6369 abc5 .Fci..
10:13:56.360821 IP (tos 0x0, ttl 42, id 36476, offset 0, flags [DF], proto UDP (17), length 40)
ec2-54-72-248-104.eu-west-1.compute.amazonaws.com.32100 > 192.168.1.71.21523: [udp sum ok] UDP, length 12
0x0000: d8eb 97a0 8908 14dd a988 b570 0800 4500 ...........p..E.
0x0010: 0028 8e7c 4000 2a11 d1a8 3648 f868 c0a8 .(.|@.*...6H.h..
0x0020: 0147 7d64 5413 0014 cce5 f113 0008 7e36 .G}dT.........~6
0x0030: f246 6369 abc5 .Fci..
10:13:56.499868 IP (tos 0x0, ttl 46, id 32005, offset 0, flags [DF], proto UDP (17), length 40)
ec2-54-179-151-251.ap-southeast-1.compute.amazonaws.com.32100 > 192.168.1.71.21523: [udp sum ok] UDP, length 12
0x0000: d8eb 97a0 8908 14dd a988 b570 0800 4500 ...........p..E.
0x0010: 0028 7d05 4000 2e11 3f22 36b3 97fb c0a8 .(}.@...?"6.....
0x0020: 0147 7d64 5413 0014 2ce8 f113 0008 7e36 .G}dT...,.....~6
0x0030: f246 6369 abc5 .Fci..
root@2106D:~# tcpdump -XX -vv -i br0 port 23906
tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:24:49.045892 IP (tos 0x0, ttl 45, id 64814, offset 0, flags [DF], proto UDP (17), length 40)
ec2-54-86-23-37.compute-1.amazonaws.com.32100 > 192.168.1.71.23906: [udp sum ok] UDP, length 12
0x0000: d8eb 97a0 8908 14dd a988 b570 0800 4500 ...........p..E.
0x0010: 0028 fd2e 4000 2d11 412c 3656 1725 c0a8 .(..@.-.A,6V.%..
0x0020: 0147 7d64 5d62 0014 a4cc f113 0008 7e36 .G}d]b........~6
0x0030: f246 6369 abc5 .Fci..
10:24:49.118974 IP (tos 0x0, ttl 42, id 36514, offset 0, flags [DF], proto UDP (17), length 40)
ec2-54-72-248-104.eu-west-1.compute.amazonaws.com.32100 > 192.168.1.71.23906: [udp sum ok] UDP, length 12
0x0000: d8eb 97a0 8908 14dd a988 b570 0800 4500 ...........p..E.
0x0010: 0028 8ea2 4000 2a11 d182 3648 f868 c0a8 .(..@.*...6H.h..
0x0020: 0147 7d64 5d62 0014 c396 f113 0008 7e36 .G}d]b........~6
0x0030: f246 6369 abc5 .Fci..
10:24:49.273486 IP (tos 0x0, ttl 46, id 32043, offset 0, flags [DF], proto UDP (17), length 40)
ec2-54-179-151-251.ap-southeast-1.compute.amazonaws.com.32100 > 192.168.1.71.23906: [udp sum ok] UDP, length 12
0x0000: d8eb 97a0 8908 14dd a988 b570 0800 4500 ...........p..E.
0x0010: 0028 7d2b 4000 2e11 3efc 36b3 97fb c0a8 .(}+@...>.6.....
0x0020: 0147 7d64 5d62 0014 2399 f113 0008 7e36 .G}d]b..#.....~6
0x0030: f246 6369 abc5 .Fci..
Thanks I'll disable the UID... Makes sense, but annoying they don't disclose it upfront. Like the cameras, but they seem to be early in their development.Overnight, Reolink Support e-mailed, advising I disable the UID value. I told them they need to document this functionality, or I wouldn't be able to recommend their cameras. The volume and frequency of these back-and-forth UDP conversations with undocumented AWS IP addresses is simply ridiculous.
If they don't work properly then it's just cheap junk...The image quality is quite good and most importantly, they are cheap!
I've been testing two RLC-410 and I find they work fine; better than a lot of what you find on Amazon. Not perfect of course, but neither are Hiks and Dahuas.If they don't work properly then it's just cheap junk...