[RESOLVED, please ignore]
[Solution: just wait ;)]
I have trouble after reworking + publishing project to client's hosting. It worked properly whole weekend, but seems to 503 me in the last 15 minutes.
Cache is cleared but clearly there may be some issue with german DNS servers - you can review our DNS settings at https://www.whatsmydns.net/#A.
Is there a way out or waiting will solve our issues?
Thanks for advance,
Error 503 Connection timed out
Connection timed out
Details: cache-fra1250-FRA 1493736687 2770579484
Varnish cache server