4 
 
3.1.4 Admin Access .................................................................................................................................... 10 
3.1.5 System Log ........................................................................................................................................ 11 
3.1.6 Configuration Management .............................................................................................................. 12 
3.1.7 Task Schedule .................................................................................................................................... 13 
3.1.8 System Upgrading ............................................................................................................................. 13 
3.1.9 Reboot ............................................................................................................................................... 13 
3.1.10 Logout ............................................................................................................................................. 14 
3. 2 Network ................................................................................................................................... 15 
3.2.1 Dialup/Cellular Connection ............................................................................................................... 15 
3.2.2 WAN (Only Applicable to IR615-S Series) .......................................................................................... 16 
3.2.3 Link Backup ....................................................................................................................................... 19 
3.2.4 LAN .................................................................................................................................................... 19 
3.2.5 Switch of WLAN Mode ...................................................................................................................... 20 
3.2.6 WLAN Client (AP Mode) .................................................................................................................... 20 
3.2.7 WLAN Client (STA Mode) ................................................................................................................... 21 
3.2.8 DNS.................................................................................................................................................... 22 
3.2.9 Dynamic Domain Name..................................................................................................................... 22 
3.2.10 Static Route ..................................................................................................................................... 23 
3.3 Service ...................................................................................................................................... 24 
3.3.1 DHCP service ..................................................................................................................................... 24 
3.3.2 DNS Relay .......................................................................................................................................... 25 
3.3.3 VRRP: Virtual Router Redundancy Protocol ...................................................................................... 26 
3.3.4 Device Manager ................................................................................................................................ 27 
3.3.5 DTU ................................................................................................................................................... 28 
3.3.6 SMS ................................................................................................................................................... 29 
3.4 Firewall ..................................................................................................................................... 29 
3.4.1 Basic Setup ........................................................................................................................................ 30 
3.4.2 Access Control (ACL) .......................................................................................................................... 30 
3.4.3 Filtering ............................................................................................................................................. 31 
3.4.4 Port Mapping .................................................................................................................................... 31