On the server hosting PRTG monitoring tool (lets call it SERVER1) , the DNS servers were not set.
On the network I am monitoring, i have COMPUTERNAME1(192.168.1.2) and COMPUTERNAME2(192.168.1.3) which are both connected to Internet via the Cisco router that is being monitored.
On the TopLists of my custom Netflow v9 sensor, i am listing the Destination IP.
In my TopList, the local computers are displayed properly : COMPUTERNAME1(192.168.1.2) COMPUTERNAME2(192.168.1.3)
But the websites being visited are displayed without their DNS names :
Which is logical since the DNS servers are not setup on the server.
But then I decided to setup thos DNS : 184.108.40.206 and 220.127.116.11
Now, the local computers are displayed like this : SERVER1(192.168.1.2) SERVER1(192.168.1.3)
But the websites visited are now displayed correctly : www.yahoo.com(18.104.22.168) www.yahoo.com(22.214.171.124)
Why can't I see the names of my local computers anymore ?
Thanks for the help