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authorJo-Philipp Wich <jow@openwrt.org>2010-07-16 00:06:59 +0000
committerJo-Philipp Wich <jow@openwrt.org>2010-07-16 00:06:59 +0000
commit9c3244a88495646571fd3548f85885ac02c2f3f5 (patch)
tree20ea2ba2db783bd9d09d3cc415ee29d50b576f9e /package/dnsmasq/files
parentd6d1dd47d39b4fd331d6cf1498272ce535b2a80d (diff)
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dnsmasq: add and enable DNS rebind protections
SVN-Revision: 22222
Diffstat (limited to 'package/dnsmasq/files')
-rw-r--r--package/dnsmasq/files/dhcp.conf5
-rw-r--r--package/dnsmasq/files/dnsmasq.init23
2 files changed, 27 insertions, 1 deletions
diff --git a/package/dnsmasq/files/dhcp.conf b/package/dnsmasq/files/dhcp.conf
index 25ecde6..c79458f 100644
--- a/package/dnsmasq/files/dhcp.conf
+++ b/package/dnsmasq/files/dhcp.conf
@@ -1,8 +1,11 @@
config dnsmasq
option domainneeded 1
option boguspriv 1
- option filterwin2k '0' #enable for dial on demand
+ option filterwin2k 0 # enable for dial on demand
option localise_queries 1
+ option rebind_protection 1 # disable if upstream must serve RFC1918 addresses
+ option rebind_localhost 0 # enable for RBL checking and similar services
+ #list rebind_domain example.lan # whitelist RFC1918 responses for domains
option local '/lan/'
option domain 'lan'
option expandhosts 1
diff --git a/package/dnsmasq/files/dnsmasq.init b/package/dnsmasq/files/dnsmasq.init
index 9bf89fa..49291a5 100644
--- a/package/dnsmasq/files/dnsmasq.init
+++ b/package/dnsmasq/files/dnsmasq.init
@@ -99,6 +99,29 @@ dnsmasq() {
config_get hostsfile "$cfg" dhcphostsfile
[ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
+
+ local rebind
+ config_get_bool rebind "$cfg" rebind_protection 1
+ [ $rebind -gt 0 ] && {
+ logger -t dnsmasq \
+ "DNS rebinding protection is active," \
+ "will discard upstream RFC1918 responses!"
+ append args "--stop-dns-rebind"
+
+ local rebind_localhost
+ config_get_bool rebind_localhost "$cfg" rebind_localhost 0
+ [ $rebind_localhost -gt 0 ] && {
+ logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
+ append args "--rebind-localhost-ok"
+ }
+
+ append_rebind_domain() {
+ logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
+ append args "--rebind-domain-ok=$1"
+ }
+
+ config_list_foreach "$cfg" rebind_domain append_rebind_domain
+ }
}
dhcp_subscrid_add() {