queries with no RD bit set are truncating
Mark Andrews
marka at isc.org
Mon Jun 15 23:19:39 UTC 2009
Showing just the header is not very useful. Please show the
FULL question and the FULL answer.
Mark
In message <f45e198a0906150105m1fd418dau35bb91bc57300032 at mail.gmail.com>, Peter
Andreev writes:
>
> Because there is nothing in server's logs.
> While client sees following:
>
> (query with no RD bit)
> - Flags: Query, Opcode - QUERY (Standard query), Rcode - Success
> QR: (0...............) Query
> Opcode: (.0000...........) QUERY (Standard query) 0
> AA: (.....0..........) Not authoritative
> TC: (......0.........) Not truncated
> RD: (.......0........) Recursion not desired <- no
> recursion!
> RA: (........0.......) Recursive query support not
> available
> Zero: (.........0......) 0
> AuthenticatedData: (..........0.....) Not AuthenticatedData
> CheckingDisabled: (...........0....) Not CheckingDisabled
> Rcode: (............0000) Success 0
> QuestionCount: 1 (0x1)
> AnswerCount: 0 (0x0)
> NameServerCount: 0 (0x0)
> AdditionalCount: 0 (0x0)
>
> (answer)
> - Flags: Response, Opcode - QUERY (Standard query), AA, TC, Rcode -
> Success
> QR: (1...............) Response
> Opcode: (.0000...........) QUERY (Standard query) 0
> AA: (.....1..........) Is authoritative
> TC: (......1.........) Message truncated <- message is
> truncated!
> RD: (.......0........) Recursion not desired
> RA: (........0.......) Recursive query support not
> available
> Zero: (.........0......) 0
> AuthenticatedData: (..........0.....) Not AuthenticatedData
> CheckingDisabled: (...........0....) Not CheckingDisabled
> Rcode: (............0000) Success 0
> QuestionCount: 1 (0x1)
> AnswerCount: 0 (0x0)
> NameServerCount: 0 (0x0)
> AdditionalCount: 0 (0x0)
>
> (query with RD bit)
> - Flags: Query, Opcode - QUERY (Standard query), RD, Rcode - Success
> QR: (0...............) Query
> Opcode: (.0000...........) QUERY (Standard query) 0
> AA: (.....0..........) Not authoritative
> TC: (......0.........) Not truncated
> RD: (.......1........) Recursion desired <- RD-flag
> set!
> RA: (........0.......) Recursive query support not
> available
> Zero: (.........0......) 0
> AuthenticatedData: (..........0.....) Not AuthenticatedData
> CheckingDisabled: (...........0....) Not CheckingDisabled
> Rcode: (............0000) Success 0
> QuestionCount: 1 (0x1)
> AnswerCount: 0 (0x0)
> NameServerCount: 0 (0x0)
> AdditionalCount: 0 (0x0)
>
> (answer)
> - Flags: Response, Opcode - QUERY (Standard query), AA, RD, Rcode -
> Success
> QR: (1...............) Response
> Opcode: (.0000...........) QUERY (Standard query) 0
> AA: (.....1..........) Is authoritative
> TC: (......0.........) Not truncated <- TC-flag not set
> RD: (.......1........) Recursion desired
> RA: (........0.......) Recursive query support not
> available
> Zero: (.........0......) 0
> AuthenticatedData: (..........0.....) Not AuthenticatedData
> CheckingDisabled: (...........0....) Not CheckingDisabled
> Rcode: (............0000) Success 0
> QuestionCount: 1 (0x1)
> AnswerCount: 5 (0x5)
> NameServerCount: 0 (0x0)
> AdditionalCount: 3 (0x3)
>
> I do not understand why so occurs.
>
>
> > Peter, why don't you post what you are seeing?
> >
> > Mark
> > --
> > Mark Andrews, ISC
> > 1 Seymour St., Dundas Valley, NSW 2117, Australia
> > PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
> >
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
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