Could not connect [Solved]

#Solve
It’s just my network supplier block the 80 and 8080 port, so i can visit my domain from localhost but not from outside .
so i use dns valadition , 443 are not blocking . so now its perfect .

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My domain is: arpat.cn
The link is : http://www.arpat.cn/.well-known/acme-challenge/ABCDEFG
i did it with manual :

# sudo certbot certonly --manual

and the link can be connect , i try to test it with browser and curl .
curl output is this :

# curl "http://www.arpat.cn/.well-known/acme-challenge/ABCDE"
# ABCDE.ADAAS

But the server is still could not connect to my domain . what can i do if its server network problem ?
thanks for help

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