[dns-operations] NS1 nameservers response size

[Mark Andrews]

You break anyone who is performing lookups from behind a PMTU limited connection. 
-- 
Mark Andrews

> On 24 May 2019, at 21:10, Jan Včelák <jv at fcelda.cz> wrote:
> 
> Hello,
> 
> I can confirm we do not respect the buffer size. We are aware of this deficiency but it also doesn't have high priority at the moment.
> 
> Have you encountered a situation where it has been causing trouble for a real application? Or is this an accidental discovery?
> 
> Jan (NS1)
> 
> Dne pá 24. 5. 2019 12:19 uživatel Manabu Sonoda <manabu-s at iij.ad.jp> napsal:
>> Are NS1not implement edns0 buffer size ?
>> Do they plan to　implement　it ?
>> 
>> ( Close eyes bad rdata....)
>> 
>> dig @dns2.p07.nsone.net globalsign.com txt +bufsize=512
>> 
>> ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> @dns2.p07.nsone.net globalsign.com txt +bufsize=512
>> ; (1 server found)
>> ;; global options: +cmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11262
>> ;; flags: qr aa rd; QUERY: 1, ANSWER: 12, AUTHORITY: 0, ADDITIONAL: 1
>> ;; WARNING: recursion requested but not available
>> 
>> ;; OPT PSEUDOSECTION:
>> ; EDNS: version: 0, flags:; udp: 4096
>> ;; QUESTION SECTION:
>> ;globalsign.com.                        IN      TXT
>> 
>> ;; ANSWER SECTION:
>> globalsign.com.         300     IN      TXT     "MS=ms71622826"
>> globalsign.com.         300     IN      TXT     "aoLxrQBK4FSoQsQVxk8Oh0QqDIiILef/m6EwZTmpg1M="
>> globalsign.com.         300     IN      TXT     "cH2cwv2lMzoxbrhQDsfB7LDv/Jsu2TDDZSQznoA/H1rtSih8CLKju0RZrRDahPyMLM4ZYA8sGijs561ll2AZPw=="
>> globalsign.com.         300     IN      TXT     "eBPD7w6DE9vYNPwczqepRahUkUAkBw5qxW7qsAOd+ig="
>> globalsign.com.         300     IN      TXT     "google-site-verification=gtfgX6oja-rl-TcVUtRidcodGC-4xwiVrFdhz2Njuo0"
>> globalsign.com.         300     IN      TXT     "pardot_341121_*=1f62b656fc75f01e2dbf46962f3df567f9435270c2ac313c6587c4bbef258d0f"
>> globalsign.com.         300     IN      TXT     "v=DKIM1\;k=rsa\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1vhugV30ayqwRy2mu+m6QyxvdVtHee/ChrUqtrPflazjf3LfuGryocUGTZ66DsHZeTpjqdcRRXms1+xpVsqqeiXipw4jNPwx9VpyIyg0suI/2QYsIjKyj0OFYWe22Ilgp/zjXXJUxJ4fTqT5ae0cAX5u3GNsj6dA8u9n3atIlIwIDAQAB"
>> globalsign.com.         300     IN      TXT     "v=DKIM1\;k=rsa\;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCzTQa7JyCBCGKvGz3/6F2vf5dXWZKOD4y56gizEWfUITZ/OvV4VYxCUAAD6JicyyPg+SjweyBcRNBVb+oaZ4NiCvCu2Pci5UIOZZwZn45XRFTpLnj/bTJE5elcmXvf2LytUQlGcM4N9qjzGlb4qdohLghBvRaQ+YpXK+Nrg6UokQIDAQAB"
>> globalsign.com.         300     IN      TXT     "v=DKIM1\;k=rsa\;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDL/t1pilYMRJcrBcyXuRdNmdpN1fnF0cC6eI34BAw7w8YW1cwH14MjbhtX6QrWhrpGFGDZOzEv3BSA8MXWNMxInJtppacMoSB2ZCRwWe4d0Hk0uklh5g5iydksSAwf+GK8YJEj9UPDJx6/y7zQytjWee9s4n2ABSGpDCMMdJkFBQIDAQAB"
>> globalsign.com.         300     IN      TXT     "v=DMARC1\;p=reject\;rua=mailto:dmarc at globalsign.com"
>> globalsign.com.         300     IN      TXT     "v=spf1 ip4:114.179.250.0/30 ip4:211.123.204.251/32 ip4:27.121.42.215/32 ip4:211.11.149.164/32 include:spf.protection.outlook.com include:_spf.salesforce.com include:spf-bma.mpme.jp include:_spf.act-on.net include:es._spf.adp.com -all"
>> globalsign.com.         300     IN      TXT     "yandex-verification:e54a3279b05955ba"
>> 
>> ;; Query time: 3 msec
>> ;; SERVER: 198.51.45.7#53(198.51.45.7)
>> ;; WHEN: Fri May 24 18:48:31 2019
>> ;; MSG SIZE  rcvd: 1551
>> 
>> -- 
>> Manabu Sonoda <manabu-s at iij.ad.jp>
>> Internet Initiative Japan Inc.
>> 
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