Knowledge Base

Plesk Site Preview shows “403 Forbidden” for all domains on a server

Symptoms

When opening a website in preview mode, the following error is shown in a web-browser:

PLESK_INFO: 403 Forbidden

The following error messages appear in /var/log/sw-cp-server/error_log:

[error] 12464#0: *103 [lua] access_by_lua(plesk_site_preview.conf:18):9: Forbidden for IP: https, client: 127.0.0.1, server: plesk-site-preview.local, request: "GET /plesk-site-preview/example.com/https/*****/ HTTP/1.0", host: "plesk-site-preview.local"

Cause

The file /etc/sw-cp-server/conf.d/plesk_site_preview.conf is corrupted.

Resolution

For Plesk Obsidian

Connect to the Plesk server via SSH.
Create a backup of the original config file, if exists:

# mv /etc/sw-cp-server/conf.d/plesk_site_preview.conf{,.bak}
Download the default file:

# wget https://plesk.zendesk.com/hc/article_attachments/360015823659/obsidian_plesk_site_preview.conf.gz
Unzip the downloaded file:

# gunzip obsidian_plesk_site_preview.conf.gz
Move the file to the /etc/sw-cp-server/conf.d/ directory.

# mv obsidian_plesk_site_preview.conf /etc/sw-cp-server/conf.d/plesk_site_preview.conf
Restart the sw-cp-server service:

# service sw-cp-server restart

For Plesk Onyx 17.8

Connect to the Plesk server via SSH.
Create a backup of the original config file, if exists:

# mv /etc/sw-cp-server/conf.d/plesk_site_preview.conf{,.bak}
Download the default file:

# wget https://plesk.zendesk.com/hc/article_attachments/360005940560/plesk_site_preview.conf.gz
Unzip the downloaded file:

# gunzip plesk_site_preview.conf.gz
Move the file to the /etc/sw-cp-server/conf.d/ directory.

# mv plesk_site_preview.conf /etc/sw-cp-server/conf.d/
Restart the sw-cp-server service:

# service sw-cp-server restart