E-MAIL Server und talk Verbindungsaufbau langsam

Hallo liebes Forum,

ich bin seit kurzem dabei mit einer eigenen Nextcloud zu arbeiten, allerdings habe ich zwei Probleme oder bessr fragen, wo ich nicht so wirklich weiter kommen, vll kann mir einer helfen:

  1. Frage:
    Ich kann ja ĂŒber die NEXTCLOUD Benachrichtigungen und Links per MAIL verschicken, dafĂŒr habe ich bei GOOGLE eine eigene EMAIL angelegt und wollte diese unter dem ADMIN Interface einrichten, allerdings obwohl ich den smtp.googlemail.com eingetragen haben, meldet er den Fehler could not etablished with host smtp.googlemail.com
    und ich vertehe nicht wieso.

  2. Frage
    Ich habe das TALK eingerichtet, ich habe eine 25MBIt Leitung mit 5 Mbit Upload, der sinn von der IDEE ist mein Bruder und ich wohnen weiter weg und unsere Eltern nmöchten uns auch mal sehen, allerdings baue ich intern eine Verbindung auf dauert der AUFBAU bis zu 5min und zwischen mir und meinem Bruder bis zu 15 min wir beiden haben die gleiche Geschwidnigkeit, kann man da noch Geschwindigkeit rausholen? Die TALK einstellungen sind Standard geblieben

Die Nextcloud lÀuft auf einen QuadCORE AMD mit 2,5 GHz mit 8GB RAM unter UBUNTU 18.04 (nicht die Server Version)

Vielen DANK

huhu @Finchen1988

ich hab nicht sooooo super viel zeit
 daher nur kurz dieser link hier aus dem forum. trifft das ggf auch auf dein problem zu?

zu 2.) kann ich derzeit gar nix sagen. außer: jemand sagte, dass man fĂŒr externe verbindungen einen TURN-server aufsetzen soll
 (schau mal hier im forum)

viel erfolg
jimmy

Vielen Dank

Punkt 1 konnte ich selber lösen, hatte mich vertippt

Punkt 2 Turn Server?

der vollstÀndigkeit halber --> HowTo: Setup Nextcloud Talk with TURN server

Wenn du von “interner Verbindung” sprichst, gehe ich davon aus, dass sich beide GesprĂ€chsteilnehmer im gleichen WLAN bzw. LAN-Netz befinden. Sollte es hier schon hapern, ist irgendwas faul, nur bin ich leider kein Netzwerkspezialist um hier weiter zu forschen. Jedenfalls braucht der Verbindungsaufbau niemals mehrere Minuten.
Im ĂŒbrigen stimme ich der Aussage von “JimmyKater” hinsichtlich des TURN-Servers zu. SpĂ€testens dann, wenn du von deinem heimischen PC oder Notebook in ein Mobilfunknetz eine Verbindung herstellen willst, wirst du scheitern bzw. sieht einer der Teilnehmer statt des Bildes eine schwarze FlĂ€che.
Die Videotelefonie in ein fremdes WLAN ohne TURN-Server geht manchmal, aber auch nicht immer. Also: du brauchst einen TURN-Server.

NACHTRAG: ich tippe einfach mal so, dass die beteiligten Ports in deinem Router ggf. nicht auf deinen Rechner weitergeleitet sind. Vielleicht forscht du auch mal in der Richtung.

naja ich habe ja die 443 und 80 an die NEXTCLOUD die auf einem virtuellen UBUNTU weitergeleitet

Mit dem Turn Server gebe ich euch recht, nach dem ich mich in das THEMA eingelesen habe, allerdings ist mir das noch nicht ganz klar ob das auch mit einer DYNDNS geht und ob ich die PORTS 3478 und 5349 behalten kann, da ich den TURN Server dann direkt auf die Virtuelle Maschine aufsetzen wĂŒrde und da der PORT 5349 ein TLS Port ist, werde ich ja ein Zertifikat brauchen, kann ich da wohl auch das Zertifikat nutzen, welches ich fĂŒr https fĂŒr die CLOUD genutzt habe, denn das habe ich auf dyndns von mir geschrieben.
EDIT:
Intern dauert nur ein paar Sekunfen auch bei Aufbau von drei Teilnehmern

So ich habe den coturn nach der Anleitung aufgesetzt und den Port 5349 als TCP und UPD ĂŒber meine Fritzbox an die Cloud weitergeleitet.
als realm habe ich meine DYNDNS genommen, aber puste kuchen
es geht nicht, was könnte ich falsch machen?

Mit DYNDNS und Nextcloud zuhause auf virtueller Maschine? - Da bin ich raus und kann leider nicht mitreden.
Abschließend villeicht noch mal der Hinweise auf meine Konfiguration. Und mit der bin ich seit ĂŒber einem Jahr ziemlich glĂŒcklich:

Eingerichtet habe ich den coturn-Server nach dieser Anleitung: https://blog.netways.de/2017/08/16/setting-up-a-turn-server-for-nextcloud-video-calls/ , wobei ich habe auf TLS verzichtet habe.
Hier nun ein Screenshot meiner Eingaben in Nextcloud:

Und nun noch meine config vom coturn (ĂŒbrigens die Version aus den Paketquellen von ubuntu 18.04). Schaue einfach auf die nicht auskommentierten Stellen:

# Coturn TURN SERVER configuration file
#
# Boolean values note: where boolean value is supposed to be used,
# you can use '0', 'off', 'no', 'false', 'f' as 'false, 
# and you can use '1', 'on', 'yes', 'true', 't' as 'true' 
# If the value is missed, then it means 'true'.
#

# Listener interface device (optional, Linux only).
# NOT RECOMMENDED. 
#
#listening-device=eth0

# TURN listener port for UDP and TCP (Default: 3478).
# Note: actually, TLS & DTLS sessions can connect to the 
# "plain" TCP & UDP port(s), too - if allowed by configuration.
#
listening-port=3478

# TURN listener port for TLS (Default: 5349).
# Note: actually, "plain" TCP & UDP sessions can connect to the TLS & DTLS
# port(s), too - if allowed by configuration. The TURN server 
# "automatically" recognizes the type of traffic. Actually, two listening
# endpoints (the "plain" one and the "tls" one) are equivalent in terms of
# functionality; but we keep both endpoints to satisfy the RFC 5766 specs.
# For secure TCP connections, we currently support SSL version 3 and 
# TLS version 1.0, 1.1 and 1.2.
# For secure UDP connections, we support DTLS version 1.
#
tls-listening-port=443

# Alternative listening port for UDP and TCP listeners;
# default (or zero) value means "listening port plus one". 
# This is needed for RFC 5780 support
# (STUN extension specs, NAT behavior discovery). The TURN Server 
# supports RFC 5780 only if it is started with more than one 
# listening IP address of the same family (IPv4 or IPv6).
# RFC 5780 is supported only by UDP protocol, other protocols
# are listening to that endpoint only for "symmetry".
#
#alt-listening-port=0
							 
# Alternative listening port for TLS and DTLS protocols.
# Default (or zero) value means "TLS listening port plus one".
#
#alt-tls-listening-port=0
	
# Listener IP address of relay server. Multiple listeners can be specified.
# If no IP(s) specified in the config file or in the command line options, 
# then all IPv4 and IPv6 system IPs will be used for listening.
#
listening-ip=IP des coturn-Servers
#listening-ip=10.207.21.238
#listening-ip=2607:f0d0:1002:51::4

# Auxiliary STUN/TURN server listening endpoint.
# Aux servers have almost full TURN and STUN functionality.
# The (minor) limitations are:
#
# 1) Auxiliary servers do not have alternative ports and
# they do not support STUN RFC 5780 functionality (CHANGE REQUEST).
#
# 2) Auxiliary servers also are never returning ALTERNATIVE-SERVER reply.
# 
# Valid formats are 1.2.3.4:5555 for IPv4 and [1:2::3:4]:5555 for IPv6.
#
# There may be multiple aux-server options, each will be used for listening
# to client requests.
#
#aux-server=172.17.19.110:33478
#aux-server=[2607:f0d0:1002:51::4]:33478

# (recommended for older Linuxes only)
# Automatically balance UDP traffic over auxiliary servers (if configured).
# The load balancing is using the ALTERNATE-SERVER mechanism.
# The TURN client must support 300 ALTERNATE-SERVER response for this 
# functionality.
#
#udp-self-balance

# Relay interface device for relay sockets (optional, Linux only).
# NOT RECOMMENDED.
#
#relay-device=eth1

# Relay address (the local IP address that will be used to relay the 
# packets to the peer).
# Multiple relay addresses may be used.
# The same IP(s) can be used as both listening IP(s) and relay IP(s).
#
# If no relay IP(s) specified, then the turnserver will apply the default
# policy: it will decide itself which relay addresses to be used, and it 
# will always be using the client socket IP address as the relay IP address
# of the TURN session (if the requested relay address family is the same
# as the family of the client socket).
#
relay-ip=IP des coturn-Servers
#relay-ip=2607:f0d0:1002:51::5

# For Amazon EC2 users:
#
# TURN Server public/private address mapping, if the server is behind NAT.
# In that situation, if a -X is used in form "-X <ip>" then that ip will be reported
# as relay IP address of all allocations. This scenario works only in a simple case
# when one single relay address is be used, and no RFC5780 functionality is required.
# That single relay address must be mapped by NAT to the 'external' IP.
# The "external-ip" value, if not empty, is returned in XOR-RELAYED-ADDRESS field.
# For that 'external' IP, NAT must forward ports directly (relayed port 12345
# must be always mapped to the same 'external' port 12345).
#
# In more complex case when more than one IP address is involved,
# that option must be used several times, each entry must
# have form "-X <public-ip/private-ip>", to map all involved addresses.
# RFC5780 NAT discovery STUN functionality will work correctly,
# if the addresses are mapped properly, even when the TURN server itself 
# is behind A NAT.
#
# By default, this value is empty, and no address mapping is used.
#
#external-ip=60.70.80.91
#
#OR:
#
external-ip=IP des coturn-Servers
#external-ip=60.70.80.92/172.17.19.102


# Number of the relay threads to handle the established connections
# (in addition to authentication thread and the listener thread).
# If explicitly set to 0 then application runs relay process in a 
# single thread, in the same thread with the listener process 
# (the authentication thread will still be a separate thread).
#
# If this parameter is not set, then the default OS-dependent 
# thread pattern algorithm will be employed. Usually the default
# algorithm is the most optimal, so you have to change this option
# only if you want to make some fine tweaks. 
#
# In the older systems (Linux kernel before 3.9),
# the number of UDP threads is always one thread per network listening
# endpoint - including the auxiliary endpoints - unless 0 (zero) or 
# 1 (one) value is set.
#
#relay-threads=0

# Lower and upper bounds of the UDP relay endpoints:
# (default values are 49152 and 65535)
#
#min-port=49152
#max-port=65535
	
# Uncomment to run TURN server in 'normal' 'moderate' verbose mode.
# By default the verbose mode is off.
#verbose
	
# Uncomment to run TURN server in 'extra' verbose mode.
# This mode is very annoying and produces lots of output.
# Not recommended under any normal circumstances.
#	
#Verbose

# Uncomment to use fingerprints in the TURN messages.
# By default the fingerprints are off.
#
fingerprint

# Uncomment to use long-term credential mechanism.
# By default no credentials mechanism is used (any user allowed).
#
lt-cred-mech

# This option is opposite to lt-cred-mech. 
# (TURN Server with no-auth option allows anonymous access).
# If neither option is defined, and no users are defined,
# then no-auth is default. If at least one user is defined, 
# in this file or in command line or in usersdb file, then
# lt-cred-mech is default.
#
#no-auth

# TURN REST API flag.
# Flag that sets a special authorization option that is based upon authentication secret.
# This feature can be used with the long-term authentication mechanism, only.
# This feature purpose is to support "TURN Server REST API", see
# "TURN REST API" link in the project's page 
# https://github.com/coturn/coturn/
#
# This option is used with timestamp:
# 
# usercombo -> "timestamp:userid"
# turn user -> usercombo
# turn password -> base64(hmac(secret key, usercombo))
#
# This allows TURN credentials to be accounted for a specific user id.
# If you don't have a suitable id, the timestamp alone can be used.
# This option is just turning on secret-based authentication.
# The actual value of the secret is defined either by option static-auth-secret,
# or can be found in the turn_secret table in the database (see below).
# 
use-auth-secret

# 'Static' authentication secret value (a string) for TURN REST API only. 
# If not set, then the turn server
# will try to use the 'dynamic' value in turn_secret table
# in user database (if present). The database-stored  value can be changed on-the-fly
# by a separate program, so this is why that other mode is 'dynamic'.
#
static-auth-secret=************GEHEIMES WORT**********

# Server name used for
# the oAuth authentication purposes.
# The default value is the realm name.
#
#server-name=blackdow.carleon.gov

# Flag that allows oAuth authentication.
#
#oauth

#The default realm to be used for the users when no explicit origin/realm 
#relationship was found in the database. Must be used with long-term 
#credentials mechanism or with TURN REST API.
#
#realm=realm

# 'Static' user accounts for long term credentials mechanism, only.
# This option cannot be used with TURN REST API.
# This option require a realm.
# 'Static' user accounts are NOT dynamically checked by the turnserver process, 
# so that they can NOT be changed while the turnserver is running.
#
#user=username1:key1
#user=username2:key2
# OR:
#user=username1:password1
#user=username2:password2
#
# Keys must be generated by turnadmin utility. The key value depends
# on user name, realm, and password:
#
# Example:
# $ turnadmin -k -u ninefingers -r north.gov -p youhavetoberealistic
# Output: 0xbc807ee29df3c9ffa736523fb2c4e8ee
# ('0x' in the beginning of the key is what differentiates the key from
# password. If it has 0x then it is a key, otherwise it is a password).
#
# The corresponding user account entry in the config file will be:
# 
#user=ninefingers:0xbc807ee29df3c9ffa736523fb2c4e8ee
# Or, equivalently, with open clear password (less secure):
#user=ninefingers:youhavetoberealistic
#

# SQLite database file name.
#
# Default file name is /var/db/turndb or /usr/local/var/db/turndb or
# /var/lib/turn/turndb.
# 
#userdb=/var/db/turndb

# PostgreSQL database connection string in the case that we are using PostgreSQL
# as the user database.
# This database can be used for long-term credential mechanism
# and it can store the secret value for secret-based timed authentication in TURN RESP API. 
# See http://www.postgresql.org/docs/8.4/static/libpq-connect.html for 8.x PostgreSQL
# versions connection string format, see 
# http://www.postgresql.org/docs/9.2/static/libpq-connect.html#LIBPQ-CONNSTRING
# for 9.x and newer connection string formats.
#
#psql-userdb="host=<host> dbname=<database-name> user=<database-user> password=<database-user-password> connect_timeout=30"

# MySQL database connection string in the case that we are using MySQL
# as the user database.
# This database can be used for long-term credential mechanism
# and it can store the secret value for secret-based timed authentication in TURN RESP API.
#
# Optional connection string parameters for the secure communications (SSL): 
# ca, capath, cert, key, cipher 
# (see http://dev.mysql.com/doc/refman/5.1/en/ssl-options.html for the 
# command options description).
#
# Use string format as below (space separated parameters, all optional):
#
#mysql-userdb="host=<host> dbname=<database-name> user=<database-user> password=<database-user-password> port=<port> connect_timeout=<seconds> read_timeout=<seconds>"

# MongoDB database connection string in the case that we are using MongoDB
# as the user database.
# This database can be used for long-term credential mechanism
# and it can store the secret value for secret-based timed authentication in TURN RESP API. 
# Use string format is described at http://hergert.me/docs/mongo-c-driver/mongoc_uri.html
#
#mongo-userdb="mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]"

# Redis database connection string in the case that we are using Redis
# as the user database.
# This database can be used for long-term credential mechanism
# and it can store the secret value for secret-based timed authentication in TURN RESP API. 
# Use string format as below (space separated parameters, all optional):
#
#redis-userdb="ip=<ip-address> dbname=<database-number> password=<database-user-password> port=<port> connect_timeout=<seconds>"

# Redis status and statistics database connection string, if used (default - empty, no Redis stats DB used).
# This database keeps allocations status information, and it can be also used for publishing
# and delivering traffic and allocation event notifications.
# The connection string has the same parameters as redis-userdb connection string. 
# Use string format as below (space separated parameters, all optional):
#
#redis-statsdb="ip=<ip-address> dbname=<database-number> password=<database-user-password> port=<port> connect_timeout=<seconds>"

# The default realm to be used for the users when no explicit 
# origin/realm relationship was found in the database, or if the TURN
# server is not using any database (just the commands-line settings
# and the userdb file). Must be used with long-term credentials 
# mechanism or with TURN REST API.
#
realm=meineNextclouddomain.de

# The flag that sets the origin consistency 
# check: across the session, all requests must have the same
# main ORIGIN attribute value (if the ORIGIN was
# initially used by the session).
#
#check-origin-consistency

# Per-user allocation quota.
# default value is 0 (no quota, unlimited number of sessions per user).
# This option can also be set through the database, for a particular realm.
#
#user-quota=0

# Total allocation quota.
# default value is 0 (no quota).
# This option can also be set through the database, for a particular realm.
#
total-quota=100

# Max bytes-per-second bandwidth a TURN session is allowed to handle
# (input and output network streams are treated separately). Anything above
# that limit will be dropped or temporary suppressed (within
# the available buffer limits).
# This option can also be set through the database, for a particular realm.
#
#max-bps=0

#
# Maximum server capacity.
# Total bytes-per-second bandwidth the TURN server is allowed to allocate
# for the sessions, combined (input and output network streams are treated separately).
#
bps-capacity=0

# Uncomment if no UDP client listener is desired.
# By default UDP client listener is always started.
#
#no-udp

# Uncomment if no TCP client listener is desired.
# By default TCP client listener is always started.
#
#no-tcp

# Uncomment if no TLS client listener is desired.
# By default TLS client listener is always started.
#
#no-tls

# Uncomment if no DTLS client listener is desired.
# By default DTLS client listener is always started.
#
#no-dtls

# Uncomment if no UDP relay endpoints are allowed.
# By default UDP relay endpoints are enabled (like in RFC 5766).
#
#no-udp-relay

# Uncomment if no TCP relay endpoints are allowed.
# By default TCP relay endpoints are enabled (like in RFC 6062).
#
#no-tcp-relay

# Uncomment if extra security is desired,
# with nonce value having limited lifetime.
# By default, the nonce value is unique for a session,
# and has unlimited lifetime. 
# Set this option to limit the nonce lifetime. 
# It defaults to 600 secs (10 min) if no value is provided. After that delay, 
# the client will get 438 error and will have to re-authenticate itself.
#
#stale-nonce=600
stale-nonce

# Uncomment if you want to set the maximum allocation
# time before it has to be refreshed.
# Default is 3600s.
#
#max-allocate-lifetime=3600


# Uncomment to set the lifetime for the channel.
# Default value is 600 secs (10 minutes).
# This value MUST not be changed for production purposes.
#
#channel-lifetime=600

# Uncomment to set the permission lifetime.
# Default to 300 secs (5 minutes).
# In production this value MUST not be changed,
# however it can be useful for test purposes.
#
#permission-lifetime=300

# Certificate file.
# Use an absolute path or path relative to the 
# configuration file.
#
#cert=/usr/local/etc/turn_server_cert.pem

# Private key file.
# Use an absolute path or path relative to the 
# configuration file.
# Use PEM file format.
#
#pkey=/usr/local/etc/turn_server_pkey.pem

# Private key file password, if it is in encoded format.
# This option has no default value.
#
#pkey-pwd=...

# Allowed OpenSSL cipher list for TLS/DTLS connections.
# Default value is "DEFAULT".
#
#cipher-list="DEFAULT"

# CA file in OpenSSL format. 
# Forces TURN server to verify the client SSL certificates.
# By default it is not set: there is no default value and the client
# certificate is not checked.
#
# Example:
#CA-file=/etc/ssh/id_rsa.cert

# Curve name for EC ciphers, if supported by OpenSSL 
# library (TLS and DTLS). The default value is prime256v1, 
# if pre-OpenSSL 1.0.2 is used. With OpenSSL 1.0.2+,
# an optimal curve will be automatically calculated, if not defined
# by this option.
#
#ec-curve-name=prime256v1

# Use 566 bits predefined DH TLS key. Default size of the key is 1066.
#
#dh566

# Use 2066 bits predefined DH TLS key. Default size of the key is 1066.
#
#dh2066

# Use custom DH TLS key, stored in PEM format in the file.
# Flags --dh566 and --dh2066 are ignored when the DH key is taken from a file.
#
#dh-file=<DH-PEM-file-name>

# Flag to prevent stdout log messages.
# By default, all log messages are going to both stdout and to 
# the configured log file. With this option everything will be 
# going to the configured log only (unless the log file itself is stdout).
#
#no-stdout-log

# Option to set the log file name.
# By default, the turnserver tries to open a log file in 
# /var/log, /var/tmp, /tmp and current directories directories
# (which open operation succeeds first that file will be used).
# With this option you can set the definite log file name.
# The special names are "stdout" and "-" - they will force everything 
# to the stdout. Also, the "syslog" name will force everything to
# the system log (syslog). 
# In the runtime, the logfile can be reset with the SIGHUP signal 
# to the turnserver process.
#
#log-file=/var/tmp/turn.log

# Option to redirect all log output into system log (syslog).
#
#syslog

# This flag means that no log file rollover will be used, and the log file
# name will be constructed as-is, without PID and date appendage.
# This option can be used, for example, together with the logrotate tool.
#
#simple-log

# Option to set the "redirection" mode. The value of this option
# will be the address of the alternate server for UDP & TCP service in form of 
# <ip>[:<port>]. The server will send this value in the attribute
# ALTERNATE-SERVER, with error 300, on ALLOCATE request, to the client.
# Client will receive only values with the same address family
# as the client network endpoint address family. 
# See RFC 5389 and RFC 5766 for ALTERNATE-SERVER functionality description. 
# The client must use the obtained value for subsequent TURN communications.
# If more than one --alternate-server options are provided, then the functionality
# can be more accurately described as "load-balancing" than a mere "redirection". 
# If the port number is omitted, then the default port 
# number 3478 for the UDP/TCP protocols will be used.
# Colon (:) characters in IPv6 addresses may conflict with the syntax of 
# the option. To alleviate this conflict, literal IPv6 addresses are enclosed 
# in square brackets in such resource identifiers, for example: 
# [2001:db8:85a3:8d3:1319:8a2e:370:7348]:3478 . 
# Multiple alternate servers can be set. They will be used in the
# round-robin manner. All servers in the pool are considered of equal weight and 
# the load will be distributed equally. For example, if we have 4 alternate servers, 
# then each server will receive 25% of ALLOCATE requests. A alternate TURN server 
# address can be used more than one time with the alternate-server option, so this 
# can emulate "weighting" of the servers.
#
# Examples: 
#alternate-server=1.2.3.4:5678
#alternate-server=11.22.33.44:56789
#alternate-server=5.6.7.8
#alternate-server=[2001:db8:85a3:8d3:1319:8a2e:370:7348]:3478
			
# Option to set alternative server for TLS & DTLS services in form of 
# <ip>:<port>. If the port number is omitted, then the default port 
# number 5349 for the TLS/DTLS protocols will be used. See the previous 
# option for the functionality description.
#
# Examples: 
#tls-alternate-server=1.2.3.4:5678
#tls-alternate-server=11.22.33.44:56789
#tls-alternate-server=[2001:db8:85a3:8d3:1319:8a2e:370:7348]:3478

# Option to suppress TURN functionality, only STUN requests will be processed.
# Run as STUN server only, all TURN requests will be ignored.
# By default, this option is NOT set.
#
#stun-only

# Option to suppress STUN functionality, only TURN requests will be processed.
# Run as TURN server only, all STUN requests will be ignored.
# By default, this option is NOT set.
#
no-stun

# This is the timestamp/username separator symbol (character) in TURN REST API.
# The default value is ':'.
# rest-api-separator=:	

# Flag that can be used to disallow peers on the loopback addresses (127.x.x.x and ::1).
# This is an extra security measure.
#
no-loopback-peers

# Flag that can be used to disallow peers on well-known broadcast addresses (224.0.0.0 and above, and FFXX:*).
# This is an extra security measure.
#
no-multicast-peers

# Option to set the max time, in seconds, allowed for full allocation establishment. 
# Default is 60 seconds.
#
#max-allocate-timeout=60

# Option to allow or ban specific ip addresses or ranges of ip addresses. 
# If an ip address is specified as both allowed and denied, then the ip address is 
# considered to be allowed. This is useful when you wish to ban a range of ip 
# addresses, except for a few specific ips within that range.
#
# This can be used when you do not want users of the turn server to be able to access
# machines reachable by the turn server, but would otherwise be unreachable from the 
# internet (e.g. when the turn server is sitting behind a NAT)
#
# Examples:
# denied-peer-ip=83.166.64.0-83.166.95.255
# allowed-peer-ip=83.166.68.45

# File name to store the pid of the process.
# Default is /var/run/turnserver.pid (if superuser account is used) or
# /var/tmp/turnserver.pid .
#
#pidfile="/var/run/turnserver.pid"

# Require authentication of the STUN Binding request.
# By default, the clients are allowed anonymous access to the STUN Binding functionality.
#
#secure-stun

# Mobility with ICE (MICE) specs support.
#
#mobility

# User name to run the process. After the initialization, the turnserver process
# will make an attempt to change the current user ID to that user.
#
#proc-user=<user-name>

# Group name to run the process. After the initialization, the turnserver process
# will make an attempt to change the current group ID to that group.
#
#proc-group=<group-name>

# Turn OFF the CLI support.
# By default it is always ON.
# See also options cli-ip and cli-port.
#
#no-cli

#Local system IP address to be used for CLI server endpoint. Default value
# is 127.0.0.1.
#
#cli-ip=127.0.0.1

# CLI server port. Default is 5766.
#
#cli-port=5766

# CLI access password. Default is empty (no password).
# For the security reasons, it is recommended to use the encrypted
# for of the password (see the -P command in the turnadmin utility).
#
# Secure form for password 'qwerty':
#
#cli-password=$5$79a316b350311570$81df9cfb9af7f5e5a76eada31e7097b663a0670f99a3c07ded3f1c8e59c5658a
#
# Or unsecure form for the same paassword:
#
#cli-password=qwerty

# Server relay. NON-STANDARD AND DANGEROUS OPTION. 
# Only for those applications when we want to run 
# server applications on the relay endpoints.
# This option eliminates the IP permissions check on 
# the packets incoming to the relay endpoints.
#
#server-relay

# Maximum number of output sessions in ps CLI command.
# This value can be changed on-the-fly in CLI. The default value is 256.
#
#cli-max-output-sessions

# Set network engine type for the process (for internal purposes).
#
#ne=[1|2|3]

# Do not allow an TLS/DTLS version of protocol
#
#no-tlsv1
#no-tlsv1_1
#no-tlsv1_2

Die Anleitung habe ich auch gefunden, mir ist nur nicht klar, hast du als externe ip deine interne IP des Servers genommen?

Vielen DAnk fĂŒr die Hilfe,
der Coturn scheint mit dyndns nicht klar zu kommen, mit meiner externen IP funktioniert das