Name: Dahua NVR2104-I2
Brand: Dahua
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Figure 5-263 Anti-Dos Attack

5.14.3.4 Sync Time-Allowlist

Background Information

You can congure which hosts are allowed to synchronize time with the Device.

Procedure

Step 1 Select Main Menu > SECURITY > Attack Defense > Sync Time-Allowlist.

User's Manual

376

Foreword2
Important Safeguards and Warnings5
Table of Contents7
Introduction14
Overview14
Features14
Front Panel and Rear Panel17
Front Panel17
Nvr41-4Ks2/Nvr41-P-4Ks2/Nvr41-8P-4Ks2/Nvr41-4Ks2/L/Nvr41-P-4Ks2/L/ Nvr41-8P-4Ks2/L/Nvr21-4Ks2/Nvr21-P-4Ks2/Nvr21-8P-4Ks2/Nvr21-S3/Nvr21-P-S317
NVR21-8P-S3/NVR41-EI/NVR41-P-EI/NVR41-8P-EI Series17
Nvr21Hs-P-4Ks2/Nvr21Hs-8P-4Ks2/Nvr21Hs-S3/Nvr21Hs-P-S3/Nvr21Hs-8P-S318
Nvr54-16P-4Ks2E/Nvr58-16P-4Ks2E19
NVR21-W-4KS2 Series20
NVR21HS-W-4KS2/NVR11HS-W-S2-CE/NVR11HS-W-S2-FCC Series21
NVR21-I/NVR21-I2/NVR21-P-I/NVR21-P-I2/NVR21-8P-I/NVR21-8P-I2 Series22
Nvr42-P-Ei/Nvr41Hs-8P-Ei/Nvr42-8P-Ei/Nvr42-16P-Ei/Nvr44-Ei/Nvr44-16P-Ei23
NVR21HS-I/NVR21HS-I2/NVR21HS-P-I/NVR21HS-P-I2/NVR21HS-8P-I/NVR21HS-8P-I2/ NVR44-4KS2/I/NVR44-16P-4KS2/I Series25
NVR48-I/NVR58-I/NVR58-I/L Series25
NVR42-I/NVR44-I/NVR54-I/NVR54-I/L/NVR52-I/NVR52-I/L Series26
Nvr48-4Ks2/I/Nvr48-16P-4Ks2/I/Nvr54-Ei/Nvr54-16P-Ei/Nvr58-Ei/Nvr58-16P-Ei/ Nvr48-Ei/Nvr48-16P-Ei27
NVR608-32-4KS2 Series28
NVR608-64-4KS2/NVR608-128-4KS2/NVR608H-XI/NVR608RH-XI Series28
NVR616-4KS2/NVR50-EI Series29
Rear Panel31
NVR21-4KS2/NVR21-P-4KS2/NVR21-8P-4KS2/NVR41-EI/NVR41-8P-EI/NVR41-P-EI Series31
NVR22-4KS2/NVR22-P-4KS2/NVR22-8P-4KS2 Series35
Nvr52-4Ks2/Nvr52-8P-4Ks2/Nvr52-16P-4Ks2/Nvr52-24P-4Ks2/Nvr52-8P-4Ks2E/ Nvr52-16P-4Ks2E/Nvr52-Ei/Nvr52-8P-Ei/Nvr52-16P-Ei/Nvr42-16P-Ei37
Nvr54-4Ks2/Nvr58-4Ks2/Nvr54-16P-4Ks2/Nvr58-16P-4Ks2/Nvr54-24P-4Ks2/ Nvr58-16P-4Ks2E40
Nvr41-4Ks2/Nvr41-P-4Ks2/Nvr41-8P-4Ks2/Nvr41-4Ks2/L/Nvr41-P-4Ks2/L/ Nvr41-8P-4Ks2/L/Nvr21-S3/Nvr21-P-S3/Nvr21-8P-S343
NVR42-4KS2/NVR42-P-4KS2/NVR42-8P-4KS2/NVR42-16P-4KS2/NVR42-4KS2/L/NVR42- P-4KS2/L/NVR42-8P-4KS2/L/NVR42-16P-4KS2/L/NVR42-EI/NVR42-P-EI/NVR42-8P-EI Series44
NVR44-4KS2/NVR44-16P-4KS2/NVR44-4KS2/L/NVR44-16P-4KS2/L/NVR44-4KS2/I/ NVR44-16P-4KS2/I/NVR48-EI/NVR44-EI/NVR48-16P-EI/NVR44-16P-EI Series46
NVR48-4KS2/NVR48-16P-4KS2/NVR48-4KS2/L/NVR48-16P-4KS2/L/NVR48-4KS2/I/ NVR48-16P-4KS2/I Series49
NVR21-W-4KS2 Series51
NVR21HS-W-4Ks2Series52
NVR21-I/NVR21-I2 Series53
NVR22-I/NVR22-I2 Series54
NVR21-P-I/NVR21-P-I2 Series55
NVR22-P-I/NVR22-P-I2 Series56
NVR21-8P-I/NVR21-8P-I2 Series58
NVR22-8P-I/NVR22-8P-I2 Series59
NVR22-16P-I/NVR22-8P-I2 Series60
NVR21HS-I/NVR21HS-I2 Series62
NVR21HS-P-I/NVR21HS-P-I2 Series63
NVR21HS-8P-I/NVR21HS-8P-I2 Series64
NVR4208-8P-I Series65
NVR4216-I Series66
NVR58-I/NVR58-I/L/NVR48-I Series67
NVR54-I/NVR54-I/L/NVR44-I Series69
NVR52-16P-I/NVR52-16P-I/L/NVR52-8P-I/NVR52-8P-I/L/NVR42-16P-I Series71
NVR608-4KS2/NVR608H-XI/NVR608RH-XI Series74
NVR616-4KS2 Series76
NVR11HS-W-S2-CE/NVR11HS-W-S2-FCC Series78
NVR54-EI/NVR54-16P-EI/NVR58-EI/NVR58-16P-EI Series79
NVR50-EI Series82
Alarm Connection82
Alarm Port82
Alarm Input Port83
Alarm Output Port85
Alarm Relay Specifications86
Two-Way Talk86
Device-End to PC-End86
PC-End to the Device-End87
Device Installation88
Device Installation Diagram88
Checking Unpacked NVR89
HDD Installation89
Nvr41-4Ks2/Nvr41-P-4Ks2/Nvr41-8P-4Ks2/Nvr41-4Ks2/L/Nvr41-P-4Ks2/L89
S3/Nvr41-Ei/Nvr41-P-Ei/Nvr41-8P-Ei89
Nvr11Hs-W-S2-Ce/Nvr11Hs-W-S2-Fcc/Nvr41Hs-Ei/Nvr41Hs-P-Ei/Nvr41Hs-8P-Ei292
Nvr52-16P-I/L/Nvr52-8P-I/Nvr52-8P-I/L/Nvr42-Ei/Nvr42-P-Ei/Nvr42-8P-Ei/Nvr42-16P-Ei94
Nvr44-16P-Ei98
NVR608-64-4KS2/NVR608-128-4KS2/NVR608H-32-XI/NVR608H-64-XI/NVR608H-128-XI Series102
NVR616-4KS2 Series104
CD-ROM Installation106
Connection Sample110
Nvr41-4Ks2/Nvr41-P-4Ks2/Nvr41-8P-4Ks2/Nvr41-4Ks2/L/Nvr41-P-4Ks2/L110
Ei/Nvr41-8P-Ei111
Nvr21-W-4Ks2/Nvr21Hs-W-4Ks22112
Nvr41Hs-P-Ei/Nvr41Hs-8P-Ei113
NVR22-4KS2/NVR22-P-4KS2/NVR22-8P-4KS2/NVR22-I/NVR22-I2/NVR22-P-I/NVR22-P-I2/ NVR22-8P-I/NVR22-8P-I2/NVR22-16P-I/NVR22-16P-I2 Series114
NVR52-4KS2/NVR52-8P-4KS2/NVR52-16P-4KS2/NVR52-24P-4KS2/NVR52-8P-4KS2E/ NVR52-16P-4KS2E Series115
Nvr42-4Ks2/Nvr42-P-4Ks2/Nvr42-8P-4Ks2/Nvr42-16P-4Ks2/Nvr42-4Ks2/L/Nvr42115
Nvr42-16P-Ei116
NVR54-4KS2/NVR54-16P-4KS2/NVR58-4KS2/NVR58-16P-4KS2/NVR54-24P-4KS2/ NVR54-16P-4KS2E/NVR58-16P-4KS2E Series117
NVR44-4KS2/NVR44-16P-4KS2/NVR44-4KS2/L/NVR44-16P-4KS2/L/NVR44-4KS2/I/ NVR44-16P-4KS2/I/NVR44-EI/NVR44-16P-EI Series118
NVR48-4KS2/NVR48-16P-4KS2/NVR48-4KS2/L/NVR48-16P-4KS2/L/NVR48-4KS2/I/ NVR48-16P-4KS2/I/NVR48-EI/NVR48-16P-EI Series119
NVR58-I/NVR58-I/L/NVR48-I Series120
Nvr54-I/Nvr54-I/L/Nvr44-I120
NVR52-16P-I/NVR52-16P-I/L/NVR52-8P-I/NVR52-8P-I/L/NVR42-8P-I/NVR42-16P-I Series121
NVR4216-I Series121
NVR608-4KS2/NVR608H-XI/NVR608RH-XI Series121
NVR616-4KS2 Series122
Starting the Device123
Local Operations124
Initialization124
Startup Wizard126
Login131
Main Menu133
Quick Operation Bar135
Live View137
Live Page137
Navigation Bar137
Live View Control Bar138
Shortcut Menu150
AI Live View Mode153
Split Tracking155
Ptz157
Wireless Pairing167
Sequence168
Fisheye170
Temperature Monitoring173
Shortcut Menu to Add Camera174
Smart Tracking175
Camera175
Initializing Remote Devices175
Adding Remote Devices180
Changing IP Address of Remote Device185
Configuring Image Settings186
Configuring Overlay Settings188
Configuring Encoding Settings190
Modifying Channel Name194
Checking the Poe Status194
Updating Remote Devices195
Viewing Remote Device Information196
Recording Management198
Recording Schedule198
Search and Playback205
Recording Information222
Overview223
Smart Plan224
Face Detection227
Face & Body Detection230
Face Recognition231
Ivs244
Stereo Analysis269
Video Metadata277
Anpr285
Crowd Distribution288
People Counting290
Heat Map294
Smd297
Vehicle Density300
Main-Sub Tracking302
Video Quality Analytics304
Entries Frequency307
Smart Object Detection308
Smart Sound Detection310
Alarm Settings311
Alarm Information311
Alarm Status312
Alarm Input313
Alarm Output314
Video Detection315
Audio Detection321
Thermal Alarm321
Exception322
Disarming323
Network325
Tcp/Ip325
Routing Table328
Port329
External Wi-Fi331
Wi-Fi AP332
Cellular Network336
Repeater338
Pppoe340
Ddns341
Upnp342
Email344
Snmp346
Multicast347
Alarm Center348
Register349
Switch350
P2P352
Storage353
Basic353
Disk Manager354
Raid355
Disk Group358
Disk Quota359
Disk Check360
Record Estimate364
Ftp367
Iscsi369
Account370
Group370
User372
Resetting Password375
ONVIF User380
Security382
Security Status382
System Service383
Attack Defense387
CA Certificate390
Audio/Video Encryption393
Security Warning395
System396
General Settings396
Serial Port401
Output and Display402
Display402
Tour404
Custom Layout405
Pos407
Settings407
Search410
Audio411
File Management411
Audio Play413
Broadcast414
Operation and Maintenance416
Log416
System417
Network420
Maintenance and Management423
USB Device Auto Pop-Up430
Shutdown431
Web Operation435
Network Connection435
Web Login435
Web Main Menu436
Cluster Service438
Configuring Cluster IP438
Main Device439
Sub Device440
Transferring Videos440
Configuring Cluster Control440
Cluster Log441
Glossary442
Faq443
Appendix 1 HDD Capacity Calculation447
Appendix 2 Mouse Operation448
Appendix 3 Remote Control449
Appendix 4 Compatible Network Camera List451
Appendix 5 Cybersecurity Recommendations457

Brand	Dahua
Model	NVR2104-I2
Category	Network Hardware
Language	English

Dahua NVR2104-I2 User Manual

Table of Contents

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Dahua NVR2104-I2 Specifications

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