Symptoms
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Unable to install Plesk. The following command hangs at the terminal:
# ./plesk-installerÂ
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Trying to run the one-click-installer command, the following output is shown:
# sh <(curl https://autoinstall.plesk.com/one-click-installer || wget -O – https://autoinstall.plesk.com/one-click-installer)
* Connection #0 to host autoinstall.plesk.com left intact
curl: (52) Empty reply from server
ERROR: Unable to run Plesk Installer. Possible reasons:
1) You are trying to run Plesk Installer on an unsupported OS. Your OS is CentOS-7. The list of supported OS is at http://docs.plesk.com/release-notes/current/software-requirements/
2) Temporary network problem. Check your connection to autoinstall.plesk.com, contact your provider or open a support ticket. -
The following output is shown after running one of the commands below:
# /usr/bin/wget http://autoinstall.plesk.com/Parallels_Installer/parallels_installer_CentOS_7_x86_64 -O /var/cache/parallels_installer/installer
http://autoinstall.plesk.com/Parallels_Installer/parallels_installer_CentOS_7_x86_64
Resolving autoinstall.plesk.com (autoinstall.plesk.com)… 203.0.113.2
Connecting to autoinstall.plesk.com (autoinstall.plesk.com)|203.0.113.2|:80… connected.
HTTP request sent, awaiting response… No data received.# curl http://autoinstall.plesk.com/PSA_17.5.3/extras-rpm-CentOS-7-x86_64/repodata/repomd.xml
curl: (52) Empty reply from server -
The server’s local firewall is running but there is nothing wrong there:
# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all — anywhere anywhere
Cause
Plesk repositories / Plesk update mirrors are not reachable to download installation files due to an external network issue, firewalls or proxy.
Resolution
Contact the System Administrator to check external firewall or any other external appliance that might be impeding Plesk to download files from the Plesk repositories. If everything is OK with firewall contact owner of repository mirror.
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