RE: [squid-users] WPAD and Internet Explorer 6

On Wed, 20 Apr 2005, Merton Campbell Crockett wrote:

>> 5.4.5 DNS TXT service: Entries
>>
>> -> URL as specified by the DNS TXT service: record
>
>
> I missed this method. Is the following, the correct TXT entry?
>
> IN TXT "service: wpad:http://..."

I think so. Never used it myself.

The full text reads:

5.4.5 DNS TXT service: Entries

    Client implementations SHOULD support this mechanism. If the
    implementation language/environment provides the ability to perform
    DNS lookups on QTYPEs other than A, the vendor is strongly
    encouraged to provide this support. It is acknowledged that not all
    resolver APIs provide this functionality.

    The client should attempt to retrieve TXT RRs from the DNS to obtain
    "service: URLs" contained therein. The "service: URL" will be of the
    following format, specifying a complete candidate CURL for each
    record located:

        service: wpad:http://<HOST>:<PORT><PATH>

    The client should first issue the following DNS query:
    QNAME=wpad.TGTDOM., QCLASS=IN, QTYPE=TXT

    It should process each TXT RR it receives (if any) using each
    service:URL found (if any) to generate a candidate CURL. These CURLs
    should be pursued as described in Section 5.5 and beyond. Readers
    familiar with [1] should note that WPAD clients MUST NOT perform the
    QNAME=TGTDOM., QCLASS=IN, QTYPE=TXT lookup which would be suggested
    by that document.

Regards
Henrik
Received on Wed Apr 20 2005 - 09:46:41 MDT