To add that, or any other, option to resolv.conf permanently, add the
line
options edns0
to the file
/etc/resolvconf/resolv.conf.d/base
and then resolvconf will include it in the resolv.conf that it
generates.
** Changed in: dnsmasq (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1466608
Title:
Unable to resolve domains with large EDNS0 replies
Status in dnsmasq package in Ubuntu:
Invalid
Bug description:
Not sure resolvconf is the correct place to report this bug, but I'm
unable to resolve domains with large EDNS0 replies.
A couple of examples are www.sciencedaily.com and
www.ncbi.nlm.nih.gov. Interestingly, they resolve when I use "dig
<domain>", but if I enter a URL with either of those domains in my
browser (tried Chromium and Firefox), then name resolution fails. Ping
also fails with a name resolution error message.
Here's an example:
$ dig www.ncbi.nlm.nih.gov
; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> www.ncbi.nlm.nih.gov
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8409
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 1280
;; QUESTION SECTION:
;www.ncbi.nlm.nih.gov. IN A
;; ANSWER SECTION:
www.ncbi.nlm.nih.gov. 2358 IN CNAME www.wip.ncbi.nlm.nih.gov.
www.ncbi.nlm.nih.gov. 2358 IN RRSIG CNAME 7 5 86400 20151213102025
20150616102025 52670 ncbi.nlm.nih.gov.
dZt9uuyLImbB23vdqcsSK+nWK77BREttiAP80Ovq2/xV48JsII3Uxzxc
W8OkLmc5dSdPNkfwc6QFC/+wqe+4ORb1TC4Qxw5HQxo4nCindPFGZAgJ
SEFcWRJ2HrU5BKz/MeVMALJ3YN6LSHIwkTIwJbKweTGLQTZPZTryp1M7
UQrqd0hs7tjjwVl/6zRIA5UGgFbdrLwX9jmh4ykBTqK8u0Rt/wrTeHbp
UpVMxAUdUW1CJ7xAnn/k4td6zdx7Tm5+CkS99Qva0cPfSSo6Qh4Uplun
LKwT9GR4zqBTQRjBWSTf2YdhrAU8oyh9WbQ66WHLYkC8Kp55iskL8E8p E5wOYA==
www.wip.ncbi.nlm.nih.gov. 30 IN A 130.14.29.110
www.wip.ncbi.nlm.nih.gov. 30 IN RRSIG A 7 6 30 20150708223631
20150617223631 34334 wip.ncbi.nlm.nih.gov.
aF9abjtGNMz+8NkcTGIY8GwjfZBCcL532B2sdJM891OAP2V9GwPCDGNY
VzMPzZjMGN9qHsBgXuFY5jZQNWFvWfIQctTJEZTxClyJyFhe5JbyIspg
NIO6ZXxjD3h7Ax/Sr5peyf8mfCU/8FZHPGJOhsNEFOwL3RjIddTK6Ibc
PQ55CWOuVrvw26kKj9gxBG8r6iBcKe89xHQYPm1w+Osp8c2twGhqBmfd
7zcRxFLyF0BpY63kcQiF5lJ2fI31x+zCAROL9H3L1jm/K7aMAiO5kuWl
DK57upsmtQNzjWX8coYpm7/3Gebfmpjx4BtC75L5IP/WfwVBfzHeRjAG KY/7aQ==
;; Query time: 132 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Thu Jun 18 20:26:50 CEST 2015
;; MSG SIZE rcvd: 699
$ ping www.ncbi.nlm.nih.gov
ping: unknown host www.ncbi.nlm.nih.gov
I also watched with tcpdump when trying to look up the domain
www.sciencedaily.com, and when I use dig I immediately get the reply,
but when trying with ping I don't get any reply, and it gives up after
4 queries are sent. Must have something to do with the DNS flags that
are set on the query in the different cases.
Here's a lookup with dig:
20:01:47.857269 IP 127.0.0.1.56927 > 127.0.1.1.53: 9907+ [1au] A?
www.sciencedaily.com. (49)
20:01:47.869516 IP 127.0.1.1.53 > 127.0.0.1.56927: 9907 2/6/43 CNAME
ed5n3.x.incapdns.net., A 149.126.72.70 (879)
and here's a name resolution triggered by running ping:
20:02:47.969527 IP 127.0.0.1.35905 > 127.0.1.1.53: 59118+ A?
www.sciencedaily.com. (38)
20:02:52.974752 IP 127.0.0.1.35905 > 127.0.1.1.53: 59118+ A?
www.sciencedaily.com. (38)
20:02:57.980296 IP 127.0.0.1.48738 > 127.0.1.1.53: 3668+ A?
www.sciencedaily.com. (38)
20:03:02.985493 IP 127.0.0.1.48738 > 127.0.1.1.53: 3668+ A?
www.sciencedaily.com. (38)
I've not experienced this before, though these aren't domains I
commonly visit. Is this a new issue?
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: resolvconf 1.69ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-52.86-generic 3.13.11-ckt18
Uname: Linux 3.13.0-52-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Jun 18 20:23:19 2015
InstallationDate: Installed on 2014-10-19 (241 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.2)
PackageArchitecture: all
SourcePackage: resolvconf
UpgradeStatus: No upgrade log present (probably fresh install)
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