IPFire 2.21 Core Update 127 is now available as IPFire’s first update in 2019, bringing numerous updated components and various improvements. The biggest change is the addition of the Squid 4.5 web proxy software, which brings interface changes with it to make its configuration easier, as well as other improvements. The upgrade to Squid 4.5 also removes various features from the firewall distribution, such as the web browser check, download throttling by file extension, and authentication against Microsoft Windows NT 4.0 domains. A security issue affecting the proxy authentication against Microsoft Windows Active Directory domains was fixed as well.