Theres a high chance that I will still be interested in replies several years from now 
Open a new thread when this one is closed.
Why would you want to "beat the DNS challenge" anyway?
The challenge exists to verify ownership of a domain. Are you trying to avoid that? Or are you blocking geoip in a fruitless effort to avert the system? This thread will dissolve after 30 days. If an issue resurfaces, you can post a new help request.
Spend a little more time on the community forum and search out :
https://community.letsencrypt.org/search?q=DNS%20challenge
Might help.
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If threads weren't auto closed we would have endless multi-year threads about "http validation isn't working" with thousands of me-too replies, one for every person who can't figure out how to get http traffic to reach their web server (which is a very lot of people, often with subtly different misconfigurations).
When considering questions etc for this forum also consider that it's been going for 10 yrs and almost every question has already been asked multiple times. That doesn't mean you can't just ask anyway, but it's a courtesy to the people who are trying to help you.
https://community.letsencrypt.org/search?q=auto%20close%20threads
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