Are you wanting to add A records for PC's and Servers in your network so that the router can resolve them without having an internal DNS server?
If so, the device does not support this functionality.
What you can do is have the router be the first point of contact for DNS requests (by leaving the user configured DNS section blank on the LAN setup) however it's not going to be able to resolve internal DNS for your network.
Article ID:5748 Use TheGreenBow VPN Client to Connect with RV34x Series
Router Introduction A Virtual Private Network (VPN) connection allows
users to access, send, and receive data to and from a private network by
means of going through a public or share...
Article ID:5728 Configure a Teleworker VPN Client on the RV34x Series
Router Objective The Teleworker VPN Client feature minimizes the
configuration requirements at remote locations by allowing the device to
work as a Cisco VPN hardware client. When the T...
Article ID:5708 Configure the LAN and DHCP Settings on the RV34x Series
Router Objective A Local Area Network (LAN) is a network limited to an
area such as a home or small business that is used to interconnect
devices. LAN settings can be configured to li...