Trying to download a file from Wikipedia via [[Special:Redirect]] on Labs.
Works fine for enwiki:
wget -O - 'https://en.wikipedia.org/wiki/Special:Redirect/file/Example.jpg' | less -S
<long flood of binary>
On dewiki, however:
wget -O - 'https://de.wikipedia.org/wiki/Special:Redirect/file/Example.jpg' | less -S
<HTML with "write block" warning>
Expected result: binary data.
It appears to be this block:
https://de.wikipedia.org/w/index.php?title=Spezial%3ALogbuch&type=block&user=&page=Benutzer%3A10.68.0.0%2F16&year=&month=-1&tagfilter=
which prevents a WMF IP range from creating user accounts.
tl;dr: [[Special:Redirect]] should not require write rights.