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I want to block the request traffic that this wireshark display filter would select:
(((dns.flags.response == 0) && (dns.flags.recdesired == 1)) && (dns.flags.opcode == 0)) && (ip.proto == 17) and only looking at port 53 traffic.
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I've built two signatures for DNS. One to indicate recursive lookup and not recursive lookup. When I test, the app that is evaluated first is triggered. reverse the order and the formerly 2nd app triggers. It is like the expressions are not evaluated. Has anyone done this before? I have a case open with paloalto about this, but it has been open for almost a year.
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