DansGuardian is niet zoals de naam doet vermoeden een programma om je danspasjes te verbeteren, maar een web content filtering proxy. Voor het filteren wordt gebruik gemaakt van meerdere methodes. Zo is er URL- en domein-filtering, content phrase-filtering, PICS-filtering, MIME-filtering, bestandsextentie-filtering en POST limiting. Meer informatie kan hier worden gevonden. Na ruim vijftien maanden noeste arbeid is er wederom een versie van DansGuardian beschikbaar die geschikt is voor produktiemachines. In de release notes in onder andere de volgende informatie te vinden:
DansGuardian 2.8 has many massive improvements over version 2.6, the last stable release. Just *some* of those new features include:
- A changed process model from fork-on-connect to fork-pool. This dramatically improves the performance and allows it to scale to many more concurrent users.
- Improved internationalisation language file support.
- Image replacement for advert removal.
- Added support for HP/UX.
- Added support for fully qualified addresses in banned and exception IP lists.
- Improved run-time options.
- Improved logging.
- Added URL Greylists.
- Added filter group support so different filtering settings can be used for different groups of users.
- Added a '-g' gentle restart that does not kill current connections but filter group config is re-read.
- Added intelligent list managing so that if different filter groups use the same file they will share one copy of it. It also means it does not need to read in two copies. The list managing also caches the lists between restarts thus reducing restart speed dramatically.
- Ident now uses X-Forwarded-For when DansGuardian is configured to use it.
- Added a temporal denied page bypass facility.
- Added feature where when a user is not found the IP is checked for in the filter group list.
- Added support for unescaping HTML content.
- It is no longer needed to run as root to bind to a low port. [break]
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