Apache UseCanonicalName set to On

Haym

• January 23, 2018 04:47

Hi, I ran into an issue today where a customer's addon domain was being redirected to the relevant subdomain when performing a missing trailing slash redirection on a directory. For some reason "UseCanonicalName" was set to "On" for this particular vhost, while most on the server are set to "Off" (as I would expect). I created an include to fix this for the vhost in question. Is there a reason cPanel configures some vhosts with UseCanonicalName set to On? [root@server ~]# grep "UseCanonicalName Off" /etc/apache2/conf/httpd.conf | wc -l 774 [root@server ~]# grep "UseCanonicalName On" /etc/apache2/conf/httpd.conf | wc -l 28
Thanks

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  cPanelMichael

  • January 23, 2018 16:11

  Hello @Haym, We do have an internal case open (CPANEL-17936) to address an issue where UseCanonicalName is automatically set to "On" when subdomains are created through the SubDomain::addsubdomain cPanel API 2 function. I'll monitor this case and update this thread with more information as it becomes available. In the meantime, the following command can correct this in some cases: /usr/local/cpanel/bin/userdata_update
  Thank you.

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  cPanelMichael

  • March 05, 2018 15:08

  Hello, To update, a resolution for CPANEL-17936 is planned for inclusion with cPanel version 72. It adds a UAPI call for adding a subdomain, with "UseCanonicalName" set to "Off" by default. Note that the behavior for the corresponding cPanel API 2 function will not change, as we avoid making changes to longstanding API behavior to ensure existing scripts using those API functions operate as expected. Thank you.

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