Philipp Kern

I just tried Movable Type as another weblog backend to finally reenable comments, but it failed. Really.

I have IPv6 activated on my web server, of course. (It still is not natively available with Hetzner, so I use a tunnel to SixXS for it.) My lighttpd thus passes the IPv4 IPs a bit differently to CGI scripts: 0.0.0.0 gets substituted by ::ffff:0.0.0.0 and IPv6 addresses pop up, too, especially when I access the site.

Now MT saves IPs as character varying(16) in the database, even though PostgreSQL would support IP addresses natively as a data type. One would expect the script to bail out on inserting the comment into the database or to truncate the IP. Instead it tells the commenting person that the comment was accepted, but in fact it is not saved at all. I cannot find it in the database. And MT is not even a PHP application.

Now it is possible that MT indeed complains on stderr, but well, lighttpd suppresses that fd now instead of piping it into the error log, after failing to close it properly before (#446324).