DPC3939b Gateway IP greyed out
I have got a DPC3939b comcast modem. I am trying to change the LAN gateway IP from the default 10.1.10.1 IP to a 10.42.61.3 IP. When I try to do that it will not allow me to change the last octet. I also am wanting to turn off DHCP after the change. I am logging into the modem using the cusadmin username and I am thinking that there has to be a different username to allow this type of change.