Site is not accesible: Unable to connect / connection timed out / This site can’

[Suhitha]

Question: Site is not accesible: Unable to connect / connection timed out / This site can't be reached


Applicable to:

• Plesk for Linux
• Plesk for Windows

Symptoms

Plesk, a website, or webmail can't be reached and returns a browser error

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Unable to connect

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Your Internet access is blocked ERR_NETWORK_ACCESS_DENIED

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This site can't be reached
example.com took too long to respond
ERR_CONNECTION_TIMED_OUT

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The connection has timed out

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ERR_SSL_VERSION_OR_CIPHER_MISMATCH

Cause

Ports 80 or/and 443 are blocked by a firewall.


Resolution

Open the web ports 80 and 443 on the firewall.

Note: If the issue persists, contact the ISP, hosting provider, or network administrator for assistance locating and opening the block.

• To automatically configure the internal firewall to allow all necessary connections, use Plesk Firewall. Additional software (like Imunify360) must also be configured according to its documentation.
• For external firewalls, follow the appropriate guide (contact the hosting provider if not listed): Amazon EC2, Lightsail, Google Cloud, Azure, Alibaba Cloud.