Huge headache getting my stock Lorex LNB8005-C (HWID=IPC-HFW4830EP-S) updated, but here's what finally worked for me to get from Lorex v2.460:
1. Download DH_IPC-HX5X3X-Rhea_EngSpnFrn_N_Stream3_V2.460.0000000.16.R.20170904.bin firmware (link)
2. Extract the bin file to the TFTP root folder
3...