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pedinopa_170325's avatar
pedinopa_170325
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Apr 03, 2017

DNS Irule

I am writing an irule that will listen to DNS requests and if a client IP is in a DG it will get an altered A (forwarded on to a Pool on the GTM) record otherwise the query will be forwarded on to th...
BIG-IP DNS
devops
iRules
pedinopa_170325's avatar
pedinopa_170325
Icon for Nimbostratus rankNimbostratus
Apr 06, 2017

thank you for your help

 

it is working however I notice that lookups that are contained in my irule take longer to process than ones that are not altered in my script, why would processing the irule slow it down or is this normal?

 

when DNS_REQUEST { if ([IP::addr [IP::remote_addr] equals 10.10.10.0/24]) { set ttl 1800 set A "[DNS::question name]. [DNS::question class] [DNS::question type]" if { [string tolower [DNS::question name]] equals "host.domain.com" } { DNS::answer insert "$A 20.20.20.20" DNS::return } } }