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spalande's avatar
spalande
Icon for Nacreous rankNacreous
Sep 23, 2013

Need help for iRule

Need help on iRule for mapping private IP hosted on GTM (A record) to public IP (owned by customer DMZ).   eg. 192.168.4.242 is the private IP hosted on GTM, while sending DNS response need to map...
StephanManthey's avatar
StephanManthey
Icon for Nacreous rankNacreous
Sep 24, 2013

I´ve tried to solve it with catch in a single-line but still got TCL errors.

(Probably due to the nesting.)

This one works now and inserts an A record for a sorrypage in case of no match: 
when DNS_RESPONSE {
    foreach item [DNS::answer] {
        if {[DNS::type $item] eq "A"} {
            log local0. "[DNS::rdata $item]"
            log local0. "[DNS::type $item]"
            if { [class match -value [DNS::rdata $item] equals dg_internal_external] eq "" } {
                log local0. "no match for internal A record [DNS::rdata $item]"
                DNS::rdata $item 10.141.141.10
            } else {
                log local0. "[class match -value [DNS::rdata $item] equals dg_internal_external]"
                DNS::rdata $item [class match -value [DNS::rdata $item] equals dg_internal_external]
            }
        } else {
            log local0. "[DNS::type $item]"
        }
    }
}