I¹ve just stood up a 4.3.13 instance in my lab and am setting up some basic tests. I¹ve got 4 hosts being monitored for active DNS servers, of which, one is failing, but I¹m not seeing the test actually being performed. I¹m running tcpdump on the server, and no packets are being sent. Using dig at the command line works fine. The other 3 servers all work fine.

Here¹s a sanitized config file:

#Name Servers page DNS Name servers group lab 0.0.0.0 ns1.example.net # noconn dig=soa:other.net,soa:example.net,soa:example.org,soa:example.com 0.0.0.0 ns3.example.net # noconn ssh dig=soa:anotherexample.com group virtual 0.0.0.0 ns5.example.net # noconn ssh ntp dig=soa:other.net,soa:example.net,soa:example.org,soa:example.com 0.0.0.0 ns6.example.net # noconn ssh ntp dig=soa:other.net,soa:example.net,soa:example.org,soa:example.com

ns1 fails and does not poll. ns3, ns5, and ns6 work fine.

ns1 isn¹t a real server ­ it¹s a load-balancer in front of ns5 and ns6. So it doesn¹t have any other services that could be polled.

All of the ns names resolve properly in DNS.

Any ideas? Helpful debug flags to turn on so that it spits out logfiles about why it is not sending any probes?

-- Daniel J McDonald, CCISSP # 78281