I would like to find problems with ANY. But I think that there is no problem. DNS servers don't provide standard response for ANY request. My local machine doesn't provide correct response for request:
$ dig amazon.in any ; <<>> DiG 9.16.1-Ubuntu <<>> amazon.in any ;; global options: +cmd ;; connection timed out; no servers could be reached My VPS server provide such response: ; <<>> DiG 9.10.3-P4-Ubuntu <<>> amazon.in any ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54130 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;amazon.in. IN ANY ;; ANSWER SECTION: amazon.in. 3599 IN HINFO "RFC8482" "" ;; Query time: 40 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Thu Dec 10 22:10:39 UTC 2020 ;; MSG SIZE rcvd: 59 It sometimes provides another response. But the problem is that behaviour with ANY is not stable. The present and the future of ANY are hazy. Read more here: https://blog.cloudflare.com/rfc8482-saying-goodbye-to-any/ If you don't see the problem please provide your opinion. I would like to find solution with ANY but it seems it is impossible. So what do you think? On Thu, Dec 10, 2020 at 8:30 PM Barry Scott <barry.sc...@forcepoint.com> wrote: > Answers to but your emails in line. > > I've added the twisted list back in so others can comment. > > On Wednesday, 9 December 2020 21:17:51 GMT spam tam wrote: > > As additional information you can check how operation system works with > dns. > > You can run > > > > *sudo tcpdump -i lo -v port 53* > > as UDP local sniffer. > > Agreed great tool to debug this stuff with. > And use wireshark to decode the output. > > > And run > > > > *dig google.com <http://google.com>* > > > > And you will see that it makes A request. Not ANY > > That is the dig default to use A. Use this to do a any query. > > dig google.com any > > I checked the man page to see if anything extra can be printed but it > looks like > the default is to print everything dig knows how to print. The options only > remove output it seems. > > > On Wed, Dec 9, 2020 at 11:42 PM spam tam <kuchasp...@gmail.com> wrote: > > > > > Yes. You are correct. My local dns just is not stable. But try this: > > > > > > python3.8 dns_lookup6.py amazon.in > > > > > > It provides response: > > > > > > --- dnsLookupDone ([<RR name=amazon.in type=HINFO class=IN ttl=3599s > > > auth=False>], [], []) > > > --- dnsLookupDone RR <RR name=amazon.in type=HINFO class=IN ttl=3599s > > > auth=False> type 13 payload <HINFO cpu='RFC8482' os='' ttl=3599> > > > > > > There are not CNAME, A, AAAA or NS records. This means that current > > > twisted.names.common.extractRecord will not provide IP. > > > What do you think about this? May be we should replace dns ANY request > > > with A and AAAA? > > Now that is interesting because dig returns 54 lines of output from: > > dig amazon.in any > > (I won't paste the 54 lines). > > I good question is why did twisted not see that huge set of records? > > I'd want to understand why twisted is only seeing the HINFO and not all > the other > records. Fixing that would, I'm guessing, fix a lot of things. > > I'm not sure when I can look at this. Do you want to look at the packets > that > twisted sends and receives and compared to dig? > > Barry > > > > > > > > > On Wed, Dec 9, 2020 at 12:16 PM Barry Scott < > barry.sc...@forcepoint.com> > > > wrote: > > > > > > > > On Tuesday, 8 December 2020 21:01:56 GMT spam tam wrote: > > > > > I continue to investigate the issue. I try to call your script like > > > this: > > > > > > > > > > python dns_lookup6.py www.washingtonexaminer.com > > > > > > > > > > And get response: > > > > > dnsLookupFailed <twisted.python.failure.Failure > > > > > twisted.names.error.DNSServerError: <Message id=55958 rCode=2 > > > > > maxSize=0 flags=answer,recDes,recAv > > > > > queries=[Query('www.washingtonexaminer.com', 255, 1)]>> > > > > > result.value.__dict__ {} > > > > > > > > > > Is that ok? > > > > > > > > > The output I get is this: > > > > > > > > $ python3.8 dns_lookup6.py www.washingtonexaminer.com > > > > Took: 0.029293 > > > > --- dnsLookupDone ([<RR name=www.washingtonexaminer.com type=CNAME > > > class=IN ttl=37s auth=False>], [], []) > > > > --- dnsLookupDone RR <RR name=www.washingtonexaminer.com type=CNAME > > > class=IN ttl=37s auth=False> type 5 payload <CNAME name= > > > 4067e1ed38.10005.sucurifirewall.com ttl=37> > > > > > > > > And this is the output of dig: > > > > > > > > $ dig www.washingtonexaminer.com > > > > > > > > ; <<>> DiG 9.11.24-RedHat-9.11.24-2.fc32 <<>> > www.washingtonexaminer.com > > > > ;; global options: +cmd > > > > ;; Got answer: > > > > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61831 > > > > ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 > > > > > > > > ;; OPT PSEUDOSECTION: > > > > ; EDNS: version: 0, flags:; udp: 4000 > > > > ;; QUESTION SECTION: > > > > ;www.washingtonexaminer.com. IN A > > > > > > > > ;; ANSWER SECTION: > > > > www.washingtonexaminer.com. 599 IN CNAME > > > 4067e1ed38.10005.sucurifirewall.com. > > > > 4067e1ed38.10005.sucurifirewall.com. 7199 IN A 192.124.249.5 > > > > > > > > ;; Query time: 50 msec > > > > ;; SERVER: 10.5.10.11#53(10.5.10.11) > > > > ;; WHEN: Wed Dec 09 09:13:54 GMT 2020 > > > > ;; MSG SIZE rcvd: 117 > > > > > > > > Barry > > > > > > > > > > > > > > > > > > > > > >
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