Read why this is a security risk: https://help.fasthosts.co.uk/app/answers/detail/a_id/1276/~/what-is-recursive-dns-and-why-is-it-not-recommended%3F
Where it was being flagged: https://www.shodan.io/host/178.217.32.218
Consider: http://www.dnsinspect.com/reyu.net.pl/10061960
and https://observatory.mozilla.org/analyze.html?host=host-178.217.32.218.reyu.net.pl
Re: http://toolbar.netcraft.com/site_report?url=http%3A%2F%2Fhost-178.217.32.218.reyu.net.pl%2F
Re: https://urlscan.io/result/8ee9f886-0b1f-474b-9ec5-f65afcb7fb6f#summary
Excessive info proliferation: OpenSSH 7.1 (protocol 2.0)
Especially here: http://www.chill-ink.pl/poczta/contact.php
Seems OK here: http://retire.insecurity.today/#!/scan/df9ea57203e8eab22c69ebb15b15d2f61e9883963a811f7a19f88beef99f5419
Quite some sources and sinks: http://www.domxssscanner.com/scan?url=http%3A%2F%2Fhost-178.217.32.218.reyu.net.pl%2F
but it seems sri hash tags are OK. Turns out all the files in /usr/local/squeezebox/ are world-writable…
polonus (volunteer website security analyst and website error-hunter)