Create turnserver.MD

turnserver.MD

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+```
+## This was used with OVH loaded onto a VM with Ubuntu 20
+#########################################################
+# sudo apt-get update
+# 
+# sudo apt-get install coturn
+# set TURNSERVER_ENABLED=1
+# 
+# sudo add-apt-repository ppa:certbot/certbot
+# sudo apt-get install certbot
+# sudo certbot certonly --standalone
+# 
+# sudo ls /etc/letsencrypt/live/turn3.obs.ninja/fullchain.pem
+# 
+# sudo apt install net-tools
+# ifconfig
+# 
+# sudo ufw allow 60000:62000/tcp ## can be whatever port range you want I guess
+# sudo ufw allow 60000:62000/udp ## default needed is like 40000 to 65000 or so
+#
+# sudo vi /etc/turnserver.conf
+#
+# sudo systemctl restart coturn
+# sudo systemctl status coturn
+#
+##
+
+listening-port=3478
+tls-listening-port=443
+
+external-ip = 111.222.333.444      ## external IPv4 address
+external-ip = 1111:3333:555:3333::9999  ## External ipv6 address.  Add to DNS server as well
+
+min-port=60000 ## ufw is needed to open these ports
+max-port=62000 ## default is like 49000 to 60000 or so?
+
+realm=turn3.obs.ninja	## Domain name is needed; OVH provides one, but you can add a novelty one for cheap yourself.
+server-name=turn3.obs.ninja
+
+#lt-cred-mech
+#userdb=/etc/turnuserdb.conf  ## For server-based credentials, if you want some added security
+
+fingerprint ## security
+stale-nonce ## security
+
+no-multicast-peers
+no-stun  ## you might want this on actually
+
+#oauth
+lt-cred-mech
+user=USERNAME:PASSWORD ## Change as desired
+
+# max-bps=650000 # Just over 5mbps limit ; use to prevernt DDoS attacks?
+
+no-loopback-peers
+
+# use real-valid certificate/privatekey files
+cert=/etc/letsencrypt/live/turn.obs.ninja/fullchain.pem ## update as per certbot
+pkey=/etc/letsencrypt/live/turn.obs.ninja/privkey.pem
+
+#verbose
+no-stdout-log
+```