diff --git a/type/__coturn/files/turnserver.conf.sh b/type/__coturn/files/turnserver.conf.sh
index ccd01c5..d16131c 100755
--- a/type/__coturn/files/turnserver.conf.sh
+++ b/type/__coturn/files/turnserver.conf.sh
@@ -157,8 +157,8 @@ cat << EOF
 # Lower and upper bounds of the UDP relay endpoints:
 # (default values are 49152 and 65535)
 #
-min-port=49152
-max-port=65535
+min-port=$MIN_PORT
+max-port=$MAX_PORT
 
 # Uncomment to run TURN server in 'normal' 'moderate' verbose mode.
 # By default the verbose mode is off.
@@ -437,7 +437,15 @@ cat << EOF
 # Uncomment if no UDP relay endpoints are allowed.
 # By default UDP relay endpoints are enabled (like in RFC 5766).
 #
-#no-udp-relay
+EOF
+
+if [ "$NO_UDP_RELAY" ]; then
+    echo 'no-udp-relay'
+else
+    echo '#no-udp-relay'
+fi
+
+cat << EOF
 
 # Uncomment if no TCP relay endpoints are allowed.
 # By default TCP relay endpoints are enabled (like in RFC 6062).
@@ -445,7 +453,7 @@ cat << EOF
 EOF
 
 if [ "$NO_TCP_RELAY" ]; then
-    echo 'no-tcp-releay'
+    echo 'no-tcp-relay'
 else
     echo '#no-tcp-relay'
 fi
@@ -781,3 +789,10 @@ cat << EOF
 #no-tlsv1_1
 #no-tlsv1_2
 EOF
+
+if [ -n "$EXTRA_CONFIG" ]; then
+    cat <<EOF
+# Extra configuration (overrides any previous settings)
+$EXTRA_CONFIG
+EOF
+fi
diff --git a/type/__coturn/man.rst b/type/__coturn/man.rst
index 270602c..f2885d1 100644
--- a/type/__coturn/man.rst
+++ b/type/__coturn/man.rst
@@ -8,8 +8,7 @@ cdist-type__coturn - Install and configure a coturn TURN server
 
 DESCRIPTION
 -----------
-This (singleton) type install and configure a coturn TURN
-server.
+This (singleton) type installs and configures a coturn TURN server.
 
 
 REQUIRED PARAMETERS
@@ -20,36 +19,54 @@ None.
 OPTIONAL PARAMETERS
 -------------------
 static_auth_secret
-  Secret used to access the TURN REST API.
+    Secret used to access the TURN REST API.
 
 realm
-  Defailt realm.
+    Default realm.
 
 allowed-peer
-    Allow specific ip addresses or ranges of ip addresses. Can be specified multiple times.
+    Allow specific IP addresses or ranges of IP addresses. Can be specified multiple times.
 
 denied-peer
-    Ban specific ip addresses or ranges of ip addresses. Can be specified multiple times.
+    Ban specific IP addresses or ranges of IP addresses. Can be specified multiple times.
 
 cert
-    Path to certificate file. Absolute or relative 
+    Path to certificate file. Absolute or relative. Use PEM file format.
 
 pkey
-    Patch to privaty key file. Use PEM file format.
+    Patch to private key file. Use PEM file format.
+
+min-port
+    Lower bound of the UDP port range for relay endpoints allocation.
+    Default value is 49152, according to RFC 5766.
+
+max-port
+    Upper bound of the UDP port range for relay endpoints allocation.
+    Default value is 65535, according to RFC 5766.
+
+extra-config
+    This will be appended verbatim to the end of `coturn.conf`, use this for more
+    complex setups where the parameters exposed by this type are not enough.
+    If its value is `-`, stdin will be used.
+
 
 BOOLEAN PARAMETERS
 ------------------
 use-auth-secret
-  Allows TURN credentials to be accounted for a specific user id.
+    Allows TURN credentials to be accounted for a specific user id.
 
 no-tcp-relay
-  Disable TCP relay endpoints.
+    Disable TCP relay endpoints.
+
+no-udp-relay
+    Disable UDP relay endpoints.
 
 no-tls
-  Disable TLS listener.
+    Disable TLS listener.
 
 no-dtls
-  Disable DTLS listener.
+    Disable DTLS listener.
+
 
 EXAMPLES
 --------
@@ -60,6 +77,15 @@ EXAMPLES
       --realm turn.domain.tld \
       --no_tcp_relay
 
+    __coturn \
+      --realm turn.domain.tld \
+      --extra-config '-' <<EOF
+    # Debug logging
+    Verbose
+    # Use a redis database
+    redis-userdb="ip=[::1] dbname=coturn password=secret port=6379 connect_timeout=2"
+    EOF
+
 
 SEE ALSO
 --------
diff --git a/type/__coturn/manifest b/type/__coturn/manifest
index e0b41ca..cfd0c9c 100755
--- a/type/__coturn/manifest
+++ b/type/__coturn/manifest
@@ -59,6 +59,10 @@ if [ -f "$__object/parameter/no-tcp-relay" ]; then
     export NO_TCP_RELAY=1
 fi
 
+if [ -f "$__object/parameter/no-udp-relay" ]; then
+    export NO_UDP_RELAY=1
+fi
+
 if [ -f "$__object/parameter/allowed-peer" ]; then
     ALLOWED_PEERS=$(cat "$__object/parameter/allowed-peer")
     export ALLOWED_PEERS
@@ -84,13 +88,22 @@ if [ -f "$__object/parameter/pkey" ]; then
     export PKEY
 fi
 
+if [ -f "$__object/parameter/extra-config" ]; then
+    EXTRA_CONFIG=$(cat $__object/parameter/extra-config)
+    if [ "$EXTRA_CONFIG" = "-" ]; then
+        EXTRA_CONFIG=$(cat "$__object/stdin")
+    fi
+    export EXTRA_CONFIG
+fi
+
+export MIN_PORT=$(cat "$__object/parameter/min-port")
+export MAX_PORT=$(cat "$__object/parameter/max-port")
+
 # Generate and deploy configuration file.
 mkdir -p "$__object/files"
 "$__type/files/turnserver.conf.sh" > "$__object/files/turnserver.conf"
 
 require="__package/coturn" __file $coturn_config \
   --source "$__object/files/turnserver.conf" \
-  --owner turnserver
-
-# Restart coturn server.
-require="__file/$coturn_config" __service coturn --action restart
+  --owner turnserver \
+  --onchange 'service coturn restart'
diff --git a/type/__coturn/parameter/boolean b/type/__coturn/parameter/boolean
index f9180db..65afc3b 100644
--- a/type/__coturn/parameter/boolean
+++ b/type/__coturn/parameter/boolean
@@ -1,4 +1,5 @@
 use-auth-secret
 no-tcp-relay
+no-udp-relay
 no-tls
 no-dtls
diff --git a/type/__coturn/parameter/default/max-port b/type/__coturn/parameter/default/max-port
new file mode 100644
index 0000000..7a53b35
--- /dev/null
+++ b/type/__coturn/parameter/default/max-port
@@ -0,0 +1 @@
+65535
diff --git a/type/__coturn/parameter/default/min-port b/type/__coturn/parameter/default/min-port
new file mode 100644
index 0000000..3f1a082
--- /dev/null
+++ b/type/__coturn/parameter/default/min-port
@@ -0,0 +1 @@
+49152
diff --git a/type/__coturn/parameter/optional b/type/__coturn/parameter/optional
index 515814d..f36d63d 100644
--- a/type/__coturn/parameter/optional
+++ b/type/__coturn/parameter/optional
@@ -2,3 +2,6 @@ static-auth-secret
 realm
 cert
 pkey
+min-port
+max-port
+extra-config