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I can access all website with standard port(80 and 443) example: domain.com, but why I cant access example.com:3030? I cant connect to MySQL and PostgreSQL, via direct host/port to external IP, but I can connect to MySQL from localhost.

I can connect to all external/public hostname/ip, if I try this command:

curl domain.com:6030

the result is

curl: (7) Failed to connect to domain.com port 6030: Operation timed out

but I can connect to port 80,443 and 21. I can open domain.com:6030 using another device, but why I can not using my mac?

How to fix that? I never turn on firewall.

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  • How do you know that those ports are open on the remote end? “Operation timeout” means it waited fir a response and got nothing. If it was a firewall, it would be “connection refused” – Allan May 12 '20 at 4:12
  • @Allan I can access those ports using other devices except my current mac – Muhammad Dyas Yaskur May 12 '20 at 4:14
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    From the same network? Are those devices on the same network as the Mac? – Allan May 12 '20 at 4:19
  • Hi, welcome to Ask Different. Is your Mac configured to use a proxy? (Check System Preferences > Network > Advanced > Proxies to find out.) – jaume May 12 '20 at 7:54
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Sorry all, the problem is caused by VPN application, after I turn off that I can access all port again. I didnt know if that running because that app not in the dock list, only in menu bar.

Thank @jaume for giving me the clue about that app.

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