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Forum Discussion

InfoSec_38553's avatar
InfoSec_38553
Icon for Nimbostratus rankNimbostratus
Apr 24, 2012

DNS monitor doesn't work

Hi all,     I'm trying to create DNS monitor for my DNS servers.     I used this script:   https://devcentral.f5.com/wiki/AdvDesignConfig.DNSMonitorUsingNSLookup.ashx     I didn't...
config
design
nitass's avatar
nitass
Icon for Employee rankEmployee
Jan 03, 2013
It still always marks the nodes down even though the script returns 'UP' (not sure if that is an automatic OK response, but I assume it is) have you run tcpdump to see what is going on? 

[root@ve10:Active] config  b pool dns_pool list
pool dns_pool {
   monitor all dns_test_monitor
   members 8.8.8.8:53 {}
}
[root@ve10:Active] config  b monitor dns_test_monitor list
monitor dns_test_monitor {
   defaults from external
   args "www.google.com 74.125.235.20"
   run "dns_test"
}
[root@ve10:Active] config  ls -l /config/monitors/dns_test
-rwx------ 1 root root 1533 Jan  3 19:25 /config/monitors/dns_test
[root@ve10:Active] config 
[root@ve10:Active] config  b pool dns_pool|grep -i pool\ member
+-> POOL MEMBER dns_pool/8.8.8.8:53   active,up