Symptoms
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Unable to open Plesk UI via port 8447. The following error is shown in a browser:
This site can’t be reached example.com took too long to respond.
ERR_CONNECTION_TIMED_OUT
This site can’t be reached
The connection has timed out
ERR_CONNECTION_RESET
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The
nmaputility shows that port 8447 is filtered:# nmap -p 8447 example.com
PORT STATE SERVICE
8447/tcp filtered unknown
Cause
Port 8447 that is used by Plesk Installer is filtered/closed with a firewall.
Resolution
Open port 8447 in the firewall:
Note: if this is an Amazon installation, refer to this documentation page.
Note: if this is a Google installation, refer to this documentation page.
Opening port via Plesk
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Go to Tools & Settings > Firewall and click the Enable button.
Note: If the Plesk Firewall component is not installed/missing, move to the command-line section.
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Click the rule Plesk installer > select Allow > and click OK.
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If port 8447 is still filtered/closed, check if there are any intermediate firewalls.
Contact a network administrator for further troubleshooting.
Opening port via a Command Line Interface (CLI) in Linux
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Connect to the server via SSH.
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Check the status of port 8447:
# iptables -nL | grep 8447
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For some Linux distributions (CentOS 7, Debian, Ubuntu), additional package
iptables-persistentoriptables-servicesis required to be installed before runningiptables-save:-
For CentOS 7:
# yum install iptables-services
# systemctl enable iptables-services -
For Debian:
# apt install iptables-persistent
-
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Allow incoming connections to port 8447:
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For CentOS/RHEL-based distributions:
# iptables -I INPUT 1 -p tcp --dport=8447 -j ACCEPT
# service iptables save -
For Debian/Ubuntu-based distributions:
# iptables -I INPUT 1 -p tcp --dport=8447 -j ACCEPT
# iptables-save > /etc/iptables/rules.v4
-
-
If port 8447 is still filtered/closed, check if there are any intermediate firewalls.
Contact a network administrator for further troubleshooting.
Alternatively it is possible to use command line interface (CLI) of plesk installer: How to install / uninstall Plesk components?
with