Hi,
Can you please use the fully qualified host name .
for the SLD you are doing the FQHN but not for your NWDI.
can you try to for nslookup <hostname of NWDI>
Can you get the IP address of the NWDI and then try with that in the browser.
http://ipaddressNWDI:50700/devinf
thanks
RishI abrol