Mohamed, I'd say it is valid.
RFC 6891 says (section 6.1.2) that a client or server should simply ignore OPTION-CODE values that it doesn't know about. The request should be processed as though that funny option code were not even there. DW On Oct 10, 2014, at 10:14 AM, Mohamed Lrhazi <[email protected]> wrote: > Hello, > > 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 > Queries > 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: > 00000202000048f204656e74310d73757065726773615f6d... > > > > _______________________________________________ > dns-operations mailing list > [email protected] > https://lists.dns-oarc.net/mailman/listinfo/dns-operations > dns-jobs mailing list > https://lists.dns-oarc.net/mailman/listinfo/dns-jobs
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