From 61ecb465b1c803316cb55bae0c2d7cf3c0008589 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 15 Feb 2016 18:40:02 +0100
Subject: resolved: turn on DNSSEC by default, unless configured otherwise
Let's make sure DNSSEC gets more testing, by defaulting DNSSEC to
"allow-downgrade" mode. Since distros should probably not ship DNSSEC enabled
by default add a configure switch to disable this again.
DNSSEC in "allow-downgrade" mode should mostly work without affecting user
experience. There's one exception: some captive portal systems rewrite DNS in
order to redirect HTTP traffic to the captive portal. If these systems
implement DNS servers that are otherwise DNSSEC-capable (which in fact is
pretty unlikely, but still...), then this will result in the captive portal
being inaccessible. To fix this support in NetworkManager (or any other network
management solution that does captive portal detection) is required, which
simply turns off DNSSEC during the captive portal detection, and resets it back
to the default (i.e. on) after captive portal authentication is complete.
---
src/resolve/resolved-manager.c | 2 +-
src/resolve/resolved.conf.in | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
(limited to 'src')
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index bf5efe4cfa..09e15fa230 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -485,7 +485,7 @@ int manager_new(Manager **ret) {
m->llmnr_support = RESOLVE_SUPPORT_YES;
m->mdns_support = RESOLVE_SUPPORT_NO;
- m->dnssec_mode = DNSSEC_NO;
+ m->dnssec_mode = DEFAULT_DNSSEC_MODE;
m->read_resolv_conf = true;
m->need_builtin_fallbacks = true;
m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY;
diff --git a/src/resolve/resolved.conf.in b/src/resolve/resolved.conf.in
index efc9c6733a..a288588924 100644
--- a/src/resolve/resolved.conf.in
+++ b/src/resolve/resolved.conf.in
@@ -16,4 +16,4 @@
#FallbackDNS=@DNS_SERVERS@
#Domains=
#LLMNR=yes
-#DNSSEC=no
+#DNSSEC=@DEFAULT_DNSSEC_MODE@
--
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