lately we have a problem regarding prtg. some servers keep asking the dns server for our prtg's ip. below there is an output that we face. It gives a major source management issue for our dns server. 15:50:28.291869 IP KVM.42437 > dc.xxx.yyy.domain: 29576+ A? prtg.xxx.yyy (50) 15:50:28.291881 IP KVM.42437 > dc.xxx.yyy.domain: 2703+ AAAA? prtg.xxx.yyy (50) 15:50:28.294605 IP dc.xxx.yyy.domain > KVM.42437: 29576* 1/0/0 A 10.10.aaa.bbb (66) 15:50:28.294936 IP dc.xxx.yyy.domain > KVM.42437: 2703* 0/1/0 (105) it keeps repeating approximately every 30 seconds, doesn't matter if we use ping sensor, ssh sensor or snmp sensor.

if i write our prtg server's ip to /etc/hosts file problem stops right away. but i want to find another solution.

can I set prtg to use only its ip to reach servers not its dns name? that's the solution I was wondering about.

any help would be appreciated

Article Comments

Hello there,

Thanks for your KB post.

From PRTG's point of view, DNS name to reach the server is not a must as a requirement. The only thing I can think of is, if you are using an SSL Certificate for the PRTG Web GUI, it has to use a DNS name because SSL Certificate normally binds with DNS/Domain name.

If you have remote probes in place, please ensure you set IP Address in the server field under Probe Settings for Core Connection tab in PRTG Administration Tool.

With kind regards,
Chan Siau Hen
Technical Support Team, Paessler AG


Apr, 2021 - Permalink