From the Live Screen:

Step1: Right-click and choose MAIN MENU

Basic Network Setup-click main menu

Step2: Login with admin account

Step3:Click on NETWORK under SETTINGS (bottom row)

Basic Network Setup-Main Menu Screen

Step4: Select DHCP

Basic Network Setup-Select DHCP

Step5: APPLY and SAVE (Returns to Main Menu)

Step6: Click on the NETWORK icon under INFO (middle Column)

Step7: Click on LOAD

Step8:Verify LAN1 shows SUCCEED, and has a new IP address.

Basic Network Setup-Verify Network Succeed

NOTE: THE DEFAULT IP ADDRESS IS 192.168.1.108

THE NEW IP ADDRESS SHOULD REFLECT THE LOCAL NETWORK SCHEME.
If the IP address does not change after setting the DVR to DHCP. Check the network by opening a Command prompt window (Search > CMD) using a PC.
Type IPCONFIG, the first 3 digits of the PC IP address should match the DVR NEW IP ADDRESS. If these numbers do not match, troubleshoot cabling and network ports on the switch or router.

When IP address has been verified, return to MAIN MENU

•  Click NETWORK (Bottom row)
• Select STATIC
• Verify Information
• APPLY and SAVE
• Login to the router and proceed with port forwarding to the DVR.
  You will need to forward the HTTP and TCP port to the DVR IP address.
• The default ports are:
  • HTTP: 80 (recommended : Change this port for internet security)
  • TCP: 37777
    Reference www.portforward.com as a good website for configuring many routers