summaryrefslogtreecommitdiffstats
path: root/modules/rebinding/README.rst
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:26:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:26:00 +0000
commit830407e88f9d40d954356c3754f2647f91d5c06a (patch)
treed6a0ece6feea91f3c656166dbaa884ef8a29740e /modules/rebinding/README.rst
parentInitial commit. (diff)
downloadknot-resolver-830407e88f9d40d954356c3754f2647f91d5c06a.tar.xz
knot-resolver-830407e88f9d40d954356c3754f2647f91d5c06a.zip
Adding upstream version 5.6.0.upstream/5.6.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--modules/rebinding/README.rst29
1 files changed, 29 insertions, 0 deletions
diff --git a/modules/rebinding/README.rst b/modules/rebinding/README.rst
new file mode 100644
index 0000000..222d1da
--- /dev/null
+++ b/modules/rebinding/README.rst
@@ -0,0 +1,29 @@
+.. SPDX-License-Identifier: GPL-3.0-or-later
+
+.. _mod-rebinding:
+
+Rebinding protection
+====================
+
+This module provides protection from `DNS Rebinding attack`_ by blocking
+answers which contain IPv4_ or IPv6_ addresses for private use
+(or some other special-use addresses).
+
+To enable this module insert following line into your configuration file:
+
+.. code-block:: lua
+
+ modules.load('rebinding < iterate')
+
+Please note that this module does not offer stable configuration interface
+yet. For this reason it is suitable mainly for public resolver operators
+who do not need to whitelist certain subnets.
+
+.. warning:: DNS Blacklists (`RFC 5782`_) often use `127.0.0.0/8` to blacklist
+ a domain. Using the rebinding module prevents DNSBL from functioning
+ properly.
+
+.. _`DNS Rebinding attack`: https://en.wikipedia.org/wiki/DNS_rebinding
+.. _IPv4: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
+.. _IPv6: https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
+.. _`RFC 5782`: https://tools.ietf.org/html/rfc5782#section-2.1