Você pode experimentar com a opção --no-cache
de wget
:
wget --no-cache -dS http://gateway/zero
Veja a página do manual de wget
:
'--no-cache'
Disable server-side cache. In this case, Wget will send the remote server
an appropriate directive (‘Pragma: no-cache’) to get the file from the
remote service, rather than returning the cached version. This is
especially useful for retrieving and flushing out-of-date documents on
proxy servers.
Caching is allowed by default.