TITLE:
Intermittent webmail subdomain failures despite correct configuration files and webmail settings
PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE:Onyx 17.8, CentOS 7.5
PROBLEM DESCRIPTION:On one host of ours the web server seems to "forget" the webmail subdomain configurations once in a while. Other subdomains and all main domains do not seem to be affected. A simple "service nginx reload" and "service httpd reload" fixes the issue.
STEPS TO REPRODUCE:Unclear. It just happens. There is no indication in log files. The "webmail" subdomains simply do not react and all requests to any webmail subdomain are served by the web server's default page.
ACTUAL RESULT:Webmail subdomains suddenly redirect to web server default page despite correct configuration files and previously stable operation in an unchanged configuration.
EXPECTED RESULT:Stable webmail subdomain accessibility.
ANY ADDITIONAL INFORMATION:Not a DNS issue. DNS is done externally and working correctly (resolving webmail subdomains correctly). Not a fail2ban issue. The webmail configuration files are in place where they always are, webmail program is selected correctly. There is no indication why the web server no longer processes webmail subdomains. The only solution we currently have is to reload the server configuration.
This bug report is only to document the issue. There is probably nothing that can be done about it at this time, because not enough log data or further analysis is available.
YOUR EXPECTATIONS FROM PLESK SERVICE TEAM:This bug report is only to document the issue. There is probably nothing that can be done about it at this time, because not enough log data or further analysis is available.
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