[dns-operations] Is this valid edns0 query?

Mohamed Lrhazi Mohamed.Lrhazi at georgetown.edu
Fri Oct 10 17:14:27 UTC 2014


We have an appliance generating DNS requests that our F5 DNS server is
silently dropping... We are working with both vendors to try and figure out
whose fault it is....

Could someone please tell me if this request is valid?

User Datagram Protocol, Src Port: 18646 (18646), Dst Port: domain (53)
Domain Name System (query)
    Transaction ID: 0x9b89
    Flags: 0x0100 Standard query
    Questions: 1
    Answer RRs: 0
    Authority RRs: 0
    Additional RRs: 1
        compliance.georgetown.edu: type A, class IN
            Name: compliance.georgetown.edu
            Type: A (Host address)
            Class: IN (0x0001)
    Additional records
        <Root>: type OPT
            Name: <Root>
            Type: OPT (EDNS0 option)
            UDP payload size: 1280
            Higher bits in extended RCODE: 0x0
            EDNS0 version: 0
            Z: 0x0
            Data length: 31
            Option: Unknown (20732)
                Option Code: Unknown (20732)
                Option Length: 27
                Option Data:
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