Forum Discussion

paul_dcc's avatar
paul_dcc
Icon for Nimbostratus rankNimbostratus
Apr 08, 2014

GTM DNS REQUEST

Hi All, I need an IRule for GTM so when I receive a DNS Request if it is looking for; .gcsx.gov.uk or gsi.gov.uk (and there are a few more domains) then forward it to Pool 1 or if it is looking for n...
application delivery
devops
iRules
Cory_50405's avatar
Cory_50405
Icon for Noctilucent rankNoctilucent
Apr 08, 2014

This iRule uses data groups and should allow you some more flexibility going forward, if you wish to add more domains. This will require you to create two data groups (string type is fine) in order for this to work:

dotuk_group (include gcsx.gov.uk and gsi.gov.uk domains)

nhs_group (include nhs.uk domain)

This iRule should work for you:

when DNS_REQUEST {
    DNS::question name [string tolower [DNS::question name]]
    if { [class match [DNS::question name] eq dotuk_group] } {
            DNS::disable all
            pool pool1
    }
    elseif { [class match [DNS::question name] eq nhs_group] } {
            DNS::disable all
            pool pool2
    }
    else {
            DNS::disable all
            pool default_pool
    }
}