Forwarded to devs Issue with scheduled tasks [UserAgent]

[Azurel]

User name: Azurel

TITLE

Issue with scheduled tasks [UserAgent]

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE

All

PROBLEM DESCRIPTION

Today I noticed all my scheduled tasks (plesk) not working.

In /var/log/cron there was no issue. So I run a task in plesk GUI with "run now"-button and get a error, because page request was http-status-code 403.

I block %{HTTP_USER_AGENT} with "curl", because this is used as crawler. Plesk Scheduled Tasks use "curl" as UserAgent too. My Solution was to add server IPv4 and IPv6 as exception for %{REMOTE_ADDR}.

Maybe, you change the UserAgent in something like "plesk-scheduled-tasks-request"?

There are many ready-made bot lists, which also contain "curl" and you don't notice for days or longer that Scheduled Tasks don't work at all.

STEPS TO REPRODUCE

Add
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ^curl [NC]
RewriteRule .* - [F]

and start a scheduled tasks in plesk with "run now".

ACTUAL RESULT

Response 403

EXPECTED RESULT

No error

ANY ADDITIONAL INFORMATION

Workaround (add server IPv4 and IPv6 as exception)

RewriteCond %{HTTP_USER_AGENT} ^(curl|XenForo|WordPress) [NC]
RewriteCond %{REMOTE_ADDR} !^123\.1\.2\.3$
RewriteCond %{REMOTE_ADDR} !^2a01:999:999:9999::2$
RewriteRule .* - [F]

YOUR EXPECTATIONS FROM PLESK SERVICE TEAM

Confirm bug

 

[IgorG]

From developer:

Although I cannot classify this issue as a product bug, the problem is clear. I create PPPM-12363 to address this problem.

 

[IgorG]

Fixed in Plesk Obsidian 18.0.38