Hi Tom,

thanks for the explanation.  After adding some brackets, your example code works like a charm.

[1]: https://twistedmatrix.com/documents/current/api/twisted.application.service.MultiService.html
[2]: https://twistedmatrix.com/documents/current/api/twisted.application.internet.StreamServerEndpointService.html
[3]: https://twistedmatrix.com/documents/current/api/twisted.internet.endpoints.html#serverFromString

Using your pointers, I tried the next step: TLS.

This variant of the makeService method:

ipv4_endpoint = endpoints.serverFromString(
reactor, 'ssl:{}:privateKey={}:certKey={}:interface={}'.format(
options['port'],
endpoints.quoteStringArgument(options['cert_path']),
endpoints.quoteStringArgument(options['key_path']),
options['ipv4_address']))
ipv6_endpoint = endpoints.serverFromString(
reactor, 'ssl:{}:privateKey={}:certKey={}:interface={}'.format(
options['port'],
endpoints.quoteStringArgument(options['cert_path']),
endpoints.quoteStringArgument(options['key_path']),
options['ipv6_address']))
ipv4 = internet.StreamServerEndpointService(ipv4_endpoint, meteo_factory)
ipv6 = internet.StreamServerEndpointService(ipv6_endpoint, meteo_factory)
root = MultiService()
ipv4.setServiceParent(root)
ipv6.setServiceParent(root)

does not work. It fails with:
_parseSSL() got multiple values for argument ‚interface'
same with private privateKey and certKey.

What did I wrong this time?

Thanks, Axel
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