From 652c82b2e3a238d4af3a1dfc5fb8f2b70bf77b62 Mon Sep 17 00:00:00 2001
From: bert hubert <bert.hubert@netherlabs.nl>
Date: Fri, 30 Mar 2018 21:42:30 +0200
Subject: [PATCH] add resolvers

---
 resolver.md | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/resolver.md b/resolver.md
index 5f835a9..171696a 100644
--- a/resolver.md
+++ b/resolver.md
@@ -17,8 +17,17 @@ To top this off, a modern DNS resolver will have to validate DNSSEC
 correctly. This may be among the hardest challenges of any widely used
 Internet protocol.
 
+Excellent resolvers that are freely available and open source include:
+
+ * [BIND 9](https://www.isc.org/downloads/bind/)
+ * [Knot resolver](https://www.knot-resolver.cz/)
+ * [Unbound](https://www.unbound.net/)
+ * [PowerDNS Recursor](https://www.powerdns.com/recursor.html)
+
 So in short, before attempting to write a DNS resolver, ponder if you really
-need to.
+need to. 
+
+# Resolver algorithm
 
 TBC..