Do you have any reference for this?
On Sun, 2018-08-19 at 20:08 +0200, Peter Müller wrote:
By default, Unbound neither keeps track of the number of unwanted replies nor initiates countermeasures if they become too large (DNS cache poisoning).
This sets the maximum number of tolerated unwanted replies to 5M, causing the cache to be flushed afterwards. (Upstream documentation recommends 10M as a threshold, but this turned out to be ineffective against attacks in the wild.)
See https://nlnetlabs.nl/documentation/unbound/unbound.conf/ for details.
Signed-off-by: Peter Müller peter.mueller@link38.eu
config/unbound/unbound.conf | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/config/unbound/unbound.conf b/config/unbound/unbound.conf index 3f724d8f7..fa2ca3fd4 100644 --- a/config/unbound/unbound.conf +++ b/config/unbound/unbound.conf @@ -61,6 +61,9 @@ server: harden-algo-downgrade: no use-caps-for-id: no
- # Harden against DNS cache poisoning
- unwanted-reply-threshold: 5000000
- # Listen on all interfaces interface-automatic: yes interface: 0.0.0.0