[dns-operations] can you suggest dns test/log tool

Florian Weimer fw at deneb.enyo.de
Thu Aug 10 21:11:18 UTC 2006


* william elan net:

> I'm using tethereal right now, it provides some info but not dns query 
> flags. So what I need would have to be protocol-aware and also I need
> it to support both UDP and TCP.

Huh? tethereal -V does not display query flags?  Mine does:

User Datagram Protocol, Src Port: domain (53), Dst Port: 36384 (36384)
    Source port: domain (53)
    Destination port: 36384 (36384)
    Length: 194
    Checksum: 0x9064 [correct]
Domain Name System (response)
    Transaction ID: 0x4657
    Flags: 0x8580 (Standard query response, No error)
        1... .... .... .... = Response: Message is a response
        .000 0... .... .... = Opcode: Standard query (0)
        .... .1.. .... .... = Authoritative: Server is an authority for domain
        .... ..0. .... .... = Truncated: Message is not truncated
        .... ...1 .... .... = Recursion desired: Do query recursively
        .... .... 1... .... = Recursion available: Server can do recursive queries
        .... .... .0.. .... = Z: reserved (0)
        .... .... ..0. .... = Answer authenticated: Answer/authority portion was not authenticated by the server
        .... .... .... 0000 = Reply code: No error (0)
    Questions: 1
    Answer RRs: 1
    Authority RRs: 3
    Additional RRs: 4
    Queries
        www.enyo.de: type A, class IN
            Name: www.enyo.de
            Type: A (Host address)
            Class: IN (0x0001)
    Answers
        www.enyo.de: type A, class IN, addr 212.9.189.164
            Name: www.enyo.de
            Type: A (Host address)
            Class: IN (0x0001)
            Time to live: 2 days
            Data length: 4
            Addr: 212.9.189.164



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