Maybe this is the same issue like 68228.
I'm unable to connect to some servers through the public game browser. Factorio shows "Ping: calculating" for a few seconds and then goes to "can't reach".
Logs: https://pastebin.com/ZCBTbTLX
[0.17.31] Can't reach some servers
Re: [0.17.31] Can't reach some servers
Moving to technical help.
If you want to get ahold of me I'm almost always on Discord.