OpUtils - DNS Not resolved across the ipam/spm
By Design, OpUtils will query the DNS Server to get the DNS Names for the IP Addresses.
Please follow the below steps and check the reported issue.
1. Add your DNS server(s) from Settings > OpUtils > IPAM > General (Ignore if it is already added)
2. Select the "Resolve DNS" Settings > OpUtils > SPM > General (Ignore if it is already added)
3. Scan all devices in SPM, Mac-to-IP Mapping, Subnets.
4. Now check the DNS Name for IP Addresses. If issue persists, please follow the below Solution 2.
If DNS Name not resolved after the above settings then check nslookup for those IP Addresses from the OpManager/OpUtils installed machine. If DNS Name not resolved through nslookup then you need to add DNS entries in DNS Server.
If DNS Name resolved through nslookup but not in OpUtils, then follow the below the steps and upload us the output to check the issue further.
If issue not resolved:
If Solution 1 & 2 not resolves the issue, then please get the below files to troubleshoot the issue
1. Screenshot of nslookup which resolves the DNS Name, The OpUtils Page which does not shows DNS Name
Go to <OpUtils_Installation directory>/Nmap/ Directory through command prompt
Run the following commands
1. nmap -sn -PE -v -R <IP_Address> -oX NmapOutput1.xml -oN NmapOutput1.txt
eg:- nmap -sn -PE -v -R 192.168.23.104 -oX NmapOutput1.xml -oN NmapOutput1.txt
2. nmap -sn -PE -v -d3 -R <IP_Address> -oX NmapOutput2.xml -oN NmapOutput2.txt
eg:- nmap -sn -PE -v -d3 -R 192.168.23.104 -oX NmapOutput1.xml -oN NmapOutput1.txt
3. nmap -sn -PE -v -R <IP_Address> --dns-servers <as comma separated without space> -oX NmapOutput3.xml -oN NmapOutput3.txt
eg:- nmap -sn -PE -v -R 192.168.23.104 --dns-servers 192.168.1.2,192.168.1.3 -oX NmapOutput3.xml -oN NmapOutput3.txt
nmap -sn -PE -v -R 192.168.23.104 --dns-servers 192.168.1.2 -oX NmapOutput3.xml -oN NmapOutput3.txt
4. nmap -sn -PE -v -d3 -R --system-dns <IP_Address> -oX NmapOutput4.xml -oN NmapOutput4.txt
eg:- nmap -sn -PE -v --system-dns -d3 -R 192.168.23.104 -oX NmapOutput4.xml -oN NmapOutput4.txt
Upload us the output files.
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