ufdbGuard is a URL filter to block unwanted web content on the internet. ufdbGuard can also enforce Google SafeSearch, detect UltraSurf, Tor, Skype and other chat applications, proxy tunnels and enforce safer HTTPS traffic. ufdbGuard supports the YouTube edufilter. ufdbGuard is a redirector for the Squid web proxy with 50,000 URL verifications/second. ufdbGuard integrates with user authorities like LDAP, Kerberos and Active Directory to assign different policies to different groups of users. ufdbGuard API is a library that can be linked with 3rd party applications. This API has library functions to query the URL database and find out in which URL categories a URL belongs to. The REST API is a daemon that can be queries by applications using a REST protocol. Can be used in conjunction with a commercial subscription to URLfilterDB URL filter database.