- Plesk for Linux
- Domain cannot be reached, one the following error messages is shown in a browser:
CONFIG_TEXT: Unable to connect
CONFIG_TEXT: Your Internet access is blocked ERR_NETWORK_ACCESS_DENIED
CONFIG_TEXT: This site can’t be reached
example.com took too long to respond
CONFIG_TEXT: The connection has timed out
- Ports 80 and 443 are filtered on the server:
# nmap 203.0.113.2 -p 80,443
PORT STATE SERVICE
80/tcp filtered http
443/tcp filtered https
80 (or 443, if HTTPS is used) port is blocked by firewall.
- Connect to the server using SSH.
- Add the following rule using
# iptables -I INPUT -p tcp -m multiport --port 80,443 -j ACCEPT
Depending on a server infrastructure, way to open 80 port may vary. For example, using 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.
If 80 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.