Adding static DNS entries is once again done through telnet:

rg_conf_set dns/entry/1/hostname your_host_here
rg_conf_set dns/entry/1/ip your_ip_here
save

“1″ here refers to the first entry you add. Increment as needed. “0″ is the default entry for the modem itself. To see which entries are already configured, use the command:

rg_conf_print dns