Websites/webmail hosted in Plesk are not accessible: Unable to connect, connection timed out or This site can’t be reached

1. Install Plesk firewall.

2. In Plesk, go to Tools & Settings > Firewall and click Enable Firewall Rules Management.

   

3. Once Plesk Firewall is enabled, make sure that the WWW server rule is enabled. This rule allows connections via ports 80 and 443.

   

1. Connect to the server via SSH.

2. Allow inbound connections via ports 80, 443 in a firewall:

   For SystemD based OSes:

   # firewall-cmd --zone=public --permanent --add-port=80/tcp
   # firewall-cmd --zone=public --permanent --add-port=443/tcp
   # firewall-cmd --reload

   For SystemV bases OSes:

   # iptables -I INPUT -p tcp --dport 80 -m state --state NEW -j ACCEPT
   # iptables -I INPUT -p tcp --dport 443 -m state --state NEW -j ACCEPT
   # iptables-save

   Depending on a server infrastructure, way to open 80/443 port may vary. For example, using the "firewall-cmd" utility, or, if it is an Amazon or Alibaba Cloud server, firewall settings may be managed from account directly without accessing the server.

   Note: If 80/443 is still shown as "filtered", it means that it is blocked somewhere outside of the server: on a network level, or on an Internet Service Provider side. In this case, contact your network administrator or ISP.

1. Log in to your EC2 Management console.

2. Navigate to Instances > select a required instance > click on a security group name.

   

3. On the Security Groups page, switch to the Inbound tab > click Edit > and add two new rules: HTTP for port 80 and HTTPS for port 443:

   

Note: for Amazon Lightsail, visit the following link: Open Access to Plesk Services on an Amazon Lightsail Instance

Additional information

• Which ports should be opened for all Plesk Services to work