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Commit Graph

72 Commits

Author SHA1 Message Date
Lennart Poettering
a8d0906344 resolved: add "proxy-only" stub on 127.0.0.54
This beefs up the DNS stub logic to listen on two IP addresses:
127.0.0.53 (as before) + 127.0.0.54 (new). When the latter is contact
our stub will operate in "bypass" mode only, i.e we'll try to pass DNS
requests as unmodified upstream as we can (and not do mDNS/LLMNR and
such, also no DNSSEC validation – but we'll still do DNS-over-TLS
wrapping).

This is supposed to be useful for container environments or tethering:
this stub could be exposed (via NAT redirect) to clients of this system
and we'll try to stay out of the way with doing too much DNS magic
ourselves, but still expose whatever the current DNS server is from
upstream under a stable address/port.

How to use this:

  # iptables -t nat -I PREROUTING -p udp -i <interface> --dport 53 -j DNAT --to 127.0.0.54:53
  # echo 1 > /proc/sys/net/ipv4/conf/<interface>/route_localnet
2021-11-22 22:33:24 +01:00
Zbigniew Jędrzejewski-Szmek
be0d27ee0c man: fix assorted issues reported by the manpage-l10n project
Fixes #20297.
2021-07-27 09:43:29 +02:00
rene
b838bc1126
Minor typo (#20254)
Correct resoulution with resolution.
2021-07-20 14:45:04 +09:00
plattrap
e83580bfc6 Update systemd-resolved.service.8 help
Text currently refers to `/etc/nsswitch.conf` where it should refer to `/etc/resolv.conf`.
This is in the context of defining a nameserver IP and search domains.
2021-06-18 13:43:13 +09:00
Zbigniew Jędrzejewski-Szmek
dbb3b26f1b man: clarify that global search domains apply to global servers, not all interfaces
Fixes #19257.
2021-06-11 10:32:42 +01:00
Lennart Poettering
2f166bb79b man: document _outbound 2021-04-23 12:02:24 +02:00
Zbigniew Jędrzejewski-Szmek
32f82cccea man: add footnote explaining why "localhost" query is sent out to the network
I tried to make the explanation brief, but this isn't so easy. It seems better
to push this out to a footnote instead of the main text.

Fixes #16584.
2021-03-01 13:40:52 +01:00
Zbigniew Jędrzejewski-Szmek
9273d8e6c9 man: move motivational explanation to footnote 2021-03-01 13:40:52 +01:00
Zbigniew Jędrzejewski-Szmek
d80961720c man: fix links to various pages
nss-dns doesn't have any man page that I could find.
2021-02-19 09:28:13 +01:00
Zbigniew Jędrzejewski-Szmek
75909cc7e4 man: various typos and other small issues
Fixes #18397.
2021-01-29 08:42:39 +01:00
Yu Watanabe
78bc702503 man: synthetize(d) -> synthesize(d) 2020-12-08 09:24:11 +01:00
Yu Watanabe
db9ecf0501 license: LGPL-2.1+ -> LGPL-2.1-or-later 2020-11-09 13:23:58 +09:00
Yu Watanabe
377a9545e9 tree-wide: fix typos found by Fossies codespell report 2020-10-24 13:29:31 +02:00
Zbigniew Jędrzejewski-Szmek
bace688394 man: document differences between nss-resolve and nss-dns
https://bugzilla.redhat.com/show_bug.cgi?id=1889012
https://serverfault.com/questions/626612/dns-just-started-resolving-my-server-prod-addresses-to-127-0-53-53
https://serverfault.com/questions/649352/what-are-the-security-implications-of-the-allow-dns-suffix-appending-to-unquali
2020-10-22 11:55:35 +02:00
Zbigniew Jędrzejewski-Szmek
9e1804b24c man/systemd-resolved: reword the description of query a bit
The phrase "routing domains" is used to mean both route-only domains and search
domains. Route-only domains are always called like that, and not just "route domains".

Some paragraphs are reordered to describe synthetisized records first, then
LLMNR, then various ways quries are routed.

Fixes #8928, hopefully.
2020-10-22 11:55:35 +02:00
Zbigniew Jędrzejewski-Szmek
21006e0e3e man,units: link to the new dbus-api man pages 2020-09-30 10:30:03 +02:00
Zbigniew Jędrzejewski-Szmek
2bd5e1b272 man: document the new option
Also correct "stub resolver" → "systemd-resolved" in one other option.
2020-06-18 21:28:52 +02:00
Zbigniew Jędrzejewski-Szmek
1a0e562a5b man: add description of org.freedesktop.LogControl1
I'm not sure if the LogTarget property is sufficiently general to be made into
a property that can be generally implemented. It is very closely tied to the internal
systemd logic. The other two seem fine thoough.
2020-05-05 22:41:23 +02:00
Zbigniew Jędrzejewski-Szmek
9d569d5fcb man: add a description of handling of single-label names
It turns out that our man page didn't describe the handling of single-label
names almost at all. This probably adds to the confusion regarding the subject.
So let's first describe what our current implementation is doing.

Quoting https://www.iab.org/documents/correspondence-reports-documents/2013-2/iab-statement-dotless-domains-considered-harmful/:
> Applications and platforms that apply a suffix search list to a single-label
> name are in conformance with IETF standards track RFCs. Furthermore,
> applications and platforms that do not query DNS for a TLD are in conformance
> with IETF standards track recommendations

Current behaviour is in line with that recommendation.

For #13763.
2020-04-23 19:54:52 +02:00
Zbigniew Jędrzejewski-Szmek
38b38500c6 tree-wide: use "hostname" spelling everywhere
It's not that I think that "hostname" is vastly superior to "host name". Quite
the opposite — the difference is small, and in some context the two-word version
does fit better. But in the tree, there are ~200 occurrences of the first, and
>1600 of the other, and consistent spelling is more important than any particular
spelling choice.
2020-04-21 16:58:04 +02:00
Zbigniew Jędrzejewski-Szmek
b0fb800c9b man: reindent nss-resolve(8) 2020-04-20 09:47:53 +02:00
Zbigniew Jędrzejewski-Szmek
ffd10e5a24 man: import org.freedesktop.resolve1(3) from the wiki 2020-04-16 19:46:40 +02:00
Ben Boeckel
5238e95759 codespell: fix spelling errors 2019-04-29 16:47:18 +02:00
Zbigniew Jędrzejewski-Szmek
3a54a15760 man: use same header for all files
The "include" files had type "book" for some raeason. I don't think this
is meaningful. Let's just use the same everywhere.

$ perl -i -0pe 's^..DOCTYPE (book|refentry) PUBLIC "-//OASIS//DTD DocBook XML V4.[25]//EN"\s+"http^<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"\n  "http^gms' man/*.xml
2019-03-14 14:42:05 +01:00
Zbigniew Jędrzejewski-Szmek
0307f79171 man: standarize on one-line license header
No need to waste space, and uniformity is good.

$ perl -i -0pe 's|\n+<!--\s*SPDX-License-Identifier: LGPL-2.1..\s*-->|\n<!-- SPDX-License-Identifier: LGPL-2.1+ -->|gms' man/*.xml
2019-03-14 14:29:37 +01:00
Yu, Li-Yu
abfa5697fa man: flush-caches and reset-server-features are commands for resolvectl (#11877) 2019-03-03 22:50:22 +01:00
Lennart Poettering
2e88625f03 man: document new systemd-resolved.service(8) routing features in more detail 2018-12-21 12:10:07 +01:00
Lennart Poettering
396c716c62 man: split long section in systemd-resolved.service man page into three
Also, do some minor updating.
2018-12-21 12:10:07 +01:00
Zbigniew Jędrzejewski-Szmek
514094f933 man: drop mode line in file headers
This is already included in .dir-locals, so we don't need it
in the files themselves.
2018-07-03 01:32:25 +02:00
Zbigniew Jędrzejewski-Szmek
d9b02e1697 tree-wide: drop copyright headers from frequent contributors
Fixes #9320.

for p in Shapovalov Chevalier Rozhkov Sievers Mack Herrmann Schmidt Rudenberg Sahani Landden Andersen Watanabe; do
  git grep -e 'Copyright.*'$p -l|xargs perl -i -0pe 's|/([*][*])?[*]\s+([*#]\s+)?Copyright[^\n]*'$p'[^\n]*\s*[*]([*][*])?/\n*|\n|gms; s|\s+([*#]\s+)?Copyright[^\n]*'$p'[^\n]*\n*|\n|gms'
done
2018-06-20 11:58:53 +02:00
Zbigniew Jędrzejewski-Szmek
fdbbee37d5 man: drop unused <authorgroup> tags from man sources
Docbook styles required those to be present, even though the templates that we
use did not show those names anywhere. But something changed semi-recently (I
would suspect docbook templates, but there was only a minor version bump in
recent years, and the changelog does not suggest anything related), and builds
now work without those entries. Let's drop this dead weight.

Tested with F26-F29, debian unstable.

$ perl -i -0pe 's/\s*<authorgroup>.*<.authorgroup>//gms' man/*xml
2018-06-14 12:22:18 +02:00
Lennart Poettering
96b2fb93c5 tree-wide: beautify remaining copyright statements
Let's unify an beautify our remaining copyright statements, with a
unicode ©. This means our copyright statements are now always formatted
the same way. Yay.
2018-06-14 10:20:21 +02:00
Lennart Poettering
818bf54632 tree-wide: drop 'This file is part of systemd' blurb
This part of the copyright blurb stems from the GPL use recommendations:

https://www.gnu.org/licenses/gpl-howto.en.html

The concept appears to originate in times where version control was per
file, instead of per tree, and was a way to glue the files together.
Ultimately, we nowadays don't live in that world anymore, and this
information is entirely useless anyway, as people are very welcome to
copy these files into any projects they like, and they shouldn't have to
change bits that are part of our copyright header for that.

hence, let's just get rid of this old cruft, and shorten our codebase a
bit.
2018-06-14 10:20:20 +02:00
Lennart Poettering
6561918f59 resolved: use Oxford comma at once place
As suggested by @keszybz in https://github.com/systemd/systemd/pull/9235#pullrequestreview-127150950
2018-06-08 15:41:39 +02:00
Lennart Poettering
6cdf635de0 resolved: document .local domain routing a bit more in detail
Inspired by the discussions in #8851, even though the issue appears to
be entirely unrelated to the .local domain in the end.
2018-06-08 15:03:08 +02:00
Yu Watanabe
b69f810c8a man: create man page for resolvectl 2018-04-19 03:25:25 +09:00
Zbigniew Jędrzejewski-Szmek
11a1589223 tree-wide: drop license boilerplate
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.

I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
2018-04-06 18:58:55 +02:00
Zbigniew Jędrzejewski-Szmek
572eb058cf Add SPDX license identifiers to man pages 2017-11-19 19:08:15 +01:00
Alessandro Ghedini
30046d9c89 man: fix reference to gateway hostname (#7258)
Follow-up to commit 1dc92a06e2 which didn't
catch all cases.
2017-11-07 19:13:15 +03:00
Dimitri John Ledkov
e6b2d948f8 resolved: create private stub resolve file for /etc/resolv.conf integration (#7014)
This creates a second private resolve.conf file which lists the stub resolver
and the resolved acquired search domains.

This runtime file should be used as a symlink target for /etc/resolv.conf such
that non-nss based applications can resolve search domains.

Fixes: #7009
2017-10-24 15:28:41 +02:00
Lennart Poettering
cf84484a56 resolved: include DNS server feature level info in SIGUSR1 status dump
let's make the status dump more useful for tracking down server issues.
2017-10-05 17:02:25 +02:00
Lennart Poettering
d55b0463b2 resolved: add support for explicitly forgetting everything we learnt about DNS server feature levels
This adds "systemd-resolve --reset-server-features" for explicitly
forgetting what we learnt. This might be useful for debugging
purposes, and to force systemd-resolved to restart its learning logic
for all DNS servers.
2017-10-05 16:56:50 +02:00
Zbigniew Jędrzejewski-Szmek
1ec57f3394 build-sys: s/ENABLE_RESOLVED/ENABLE_RESOLVE/
The configuration option was called -Dresolve, but the internal define
was …RESOLVED. This options governs more than just resolved itself, so
let's settle on the version without "d".
2017-10-04 12:09:51 +02:00
Lion Yang
e223f7998d doc/systemd-resolved.service: fix typo (#6422)
DNS sever => DNS server
2017-07-21 16:20:49 -04:00
AsciiWolf
28a0ad81ee man: use https:// in URLs 2017-02-21 16:28:04 +01:00
Martin Pitt
4050e04b2c resolved: correctly handle non-address RR types with /etc/hosts lookups (#4808)
Fix wrong condition test in manager_etc_hosts_lookup(), which caused it to
return an IPv4 answer when an IPv6 question was asked, and vice versa.
Also only return success if we actually found any A or AAAA record.

In systemd-resolved.service(8), point out that /etc/hosts mappings only
affect address-type lookups, not other types.

The test case currently disables DNSSEC in resolved, as there is a bug
where "-t MX" fails due to "DNSSEC validation failed" even after
"downgrading to non-DNSSEC mode". This should be dropped once that bug
gets fixed.

Fixes #4801
2016-12-22 07:58:02 +01:00
Zbigniew Jędrzejewski-Szmek
0a07667d8d man: provide html links to a bunch of external man pages 2016-08-06 16:39:53 -04:00
Lennart Poettering
91fe95e158 man: minor man page fix
Addressing:

b541146bf8 (commitcomment-17997074)
2016-07-25 20:14:13 +02:00
Zbigniew Jędrzejewski-Szmek
fc549b9605 Drop parentheses in two places 2016-07-17 19:58:07 -04:00
Lennart Poettering
b541146bf8 man: beef up resolved man page
Let's explain the various APIs and various ways to handle /etc/resolv.conf.
2016-06-21 14:15:23 +02:00