Forum Discussion
dcours_21197
Nimbostratus
NimbostratusProblem using DNS::return in a GTM iRule
Hello,
I'm trying to have a wide IP on my GTM return a NXDOMAIN response if the IP receiving the query is in a specified list. Since I want this to only apply to queries for a given wide IP, I'd l...
Mike_61663
Cirrus
CirrusYou'll have to do this as an LTM iRule as those DNS functions don't work as GTM iRules.
GTM iRules can return CNAME and A records utilising the "cname" and "host" commands respectively, but they can't return NXDOMAIN afaik.
If you want to only do this behavior for particular FQDNs (WideIPs) then simply add an additional condition to your iRule logic e.g. if { ([DNS::rrtype] eq "A") and ([DNS::rrname] eq "wideip.domain.com") } {
(just remember - to use this as an LTM iRule, make sure you enable a DNS profile on your GTM listener(s))
