Movable Type Knowledge Base: Pragma No-Cache Messages

Question

In Internet Explorer, I see odd errors at the top of the login screen regarding Pragma no-cache, and after signing in, I keep getting returned to the login screen. In Firefox, I'm unable to log in at all, because I see the HTML for the login screen.

Answer

The appearance of these messages on the screens usually means the CGI handler on the server is not set up to deal properly with Pragma no-cache headers. So you'll need to check with your host to see if their CGI handler is configured properly for these headers.

For those running under mod_perl, ask your host to check and see if the Apache configuration option PerlSendHeaders is set to On.

For those on IIS, make sure that in IIS the CGI/Perl handler is set to the command line handler (perl.exe %s %s) instead of the perl isapi filter (perl.dll).

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