http://www.perlmonks.org?node_id=1014285


in reply to Re: Perlmonks 'Not logged in Error' - Proposal for fix
in thread Perlmonks 'Not logged in Error' - Proposal for fix

Not by server configuration, but by changing the code.
You could explicitly set the cookie domain to .perlmonks.org for http://perlmonks.org and http://www.perlmonks.org