this D-Link DIR-850L TM customize firmware bug that affect Dahua imou Ip Camera, and probably only firmware version 2.12TM affected, doesn't affect TM customize TP-Link Archer C1200 v1.0 firmware 1.0.0 Build 20190805 rel.22215 (EU)
it seem there is some bug at the unifi D-Link DIR-850L router 2.12TM firmware release at 2019, Dahua imou Ip Camera Cloud Live Stream would Disconnect 99% of time, While LAN and Wifi Live Stream still working 100% of time, but 6 Models, 4 Brands of newer and older generation Ip Camera Cloud Live Stream would still working well 100% of time.
tried to reset and reconfig/setting manually without config backup and upload unifi D-Link DIR-850L router, bug issue still happen.
tried to Enable UPnP: ; IPv4 Multicast Streams: ; IPv6 Multicast Streams: ; Application Level Gateway (ALG) Configuration ; PPTP: ; IPSec (VPN): ; RTSP: ; SIP: ; and Multiple Port Forwarding, work a while and Cloud Disconnect again.
Enable DMZ: work but didn't spend the times to test it for how long, but DMZ work for only single device/IP.
Tested Dahua imou Ip Camera Cloud Live Stream with TP-Link Deco M4 v2 Latest Firmware 190917 , working 100% of time.
more Detail Report here :
https://forum.lowyat.net/index.php?showtopi...entry97021190subscribe and install unifi fibre 30mbps at December 2017, the unifi D-Link DIR-850L router came with newer Default Firmware 2.09TM , the Sticker at the plastic router casing and package box bottom has Firmware 2.09TM written, the big multiple Realtek Chipset security issue was fixed with this Default Firmware. never tried to play with different Region firmware upload & install manually with this router, the only firmware upgrade done was 2.10TM and 2.12TM , at router web interface Check for New Firmware.
tried to Flash unifi D-Link DIR-850L with newest international Firmware 2.23 with lastest fixes, 1st Boot to D-Link Router Recovery Mode and flash Middle Firmware DIR850LB1_FW210WWb03.bin , then router web interface Upgrade Manually DIR850LB1_FW220WWb03.bin , then DIR850LB1_FW223WWb01.bin , after that Restore To Factory Default Settings and reconfig/setting manually without config backup and upload.
https://forum.lowyat.net/index.php?showtopi...entry86448823http://forums.dlink.com/index.php?topic=44909.0ftp://ftp2.dlink.com/SECURITY_ADVISEMENTS...CH_v2.20B03.ziphttp://pmdap.dlink.com.tw/PMD/GetAgileFile...3494E7;19623.0;http://pmdap.dlink.com.tw/PMD/GetAgileFile...0064E7;15877.0;ftp://ftp2.dlink.com/PRODUCTS/DIR-850L/RE...BM8_WW_BETA.zipwith Latest international Firmware 2.23 , all [Dahua imou Ip Camera Cloud Live Stream would Disconnect 99% of time] issue was gone, now Dahua imou Ip Camera Cloud Cloud Live Stream was working 100% of time, same as all other [6 Models, 4 Brands of newer and older generation Ip Camera Cloud Live Stream would still working well 100% of time.] with all setting turned off [UPnP: ; IPv4 Multicast Streams: ; IPv6 Multicast Streams: ; Application Level Gateway (ALG) Configuration ; PPTP: ; IPSec (VPN): ; RTSP: ; SIP: ; Multiple Port Forwarding ; DMZ]
another issue happen since 2.12TM firmware also gone, System Log E-Mail, now it's also working 100% of time. this issue doesn't happen at 2.10TM firmware.
https://forum.lowyat.net/index.php?showtopi...entry92708171https://forum.lowyat.net/index.php?showtopi...entry92708161https://forum.lowyat.net/index.php?showtopi...entry92708142the D-Link DIR-850L international firmware doesn't have TM TR-069 and other customization, router web interface is much smoother.
just realise that unifi given C1200 have this firmware version, never update it manually, but not sure and forgot is it came with this firmware or the firmware was update by TM TR-069 , however this firmware version was not available at internet. unifi biz fibre RM139 100mbps install at 2019 September.
1.0.0 Build 20190805 rel.22215 (EU)
Archer C1200 v1.0
also, even after router restart automatically or manually, the ipv4 would still stay the same, for multiple months, but ipv6 would change every restart. fibre modem is Huawei HG8240H5 ONT
if want to change ipv4, have to restart router "many" multiple times during period of few hours. but the next ipv4 would still stay the same even after router restart.