看到「ISC DHCP Server has reached EOL」這個，月初的時候 ISC 宣佈了 EoL，除非有嚴重的安全性問題冒出來，不然官方打算停止維護了：
The 4.4.3-P1 and 4.1-ESV-R16-P2 versions of ISC DHCP, released on October 5, 2022, are the last maintenance versions of this software that ISC plans to publish. If we become aware of a significant security vulnerability, we might make an exception to this, but it is our intention to cease actively maintaining this codebase.
ISC 則是在推 Kea：
Network and system administrators deploying DHCP in new environments should look beyond ISC DHCP for a solution, as it would be irresponsible to invest in new deployments of this software which is now end-of-life. Naturally, ISC suggests new users consider our Kea DHCP server, but there are alternatives.
從維基百科上的「Comparison of DHCP server software」這頁可以看到目前 DHCP server 的選擇。最直接的差異是，其他非 ISC 的全部都是 GPL，只有 ISC 的是 non-GPL。
不過一般不太會自己架 DHCP server，大多是用設備內建裝的跑，以後如果有機會要裝的話，也許得去熟悉 Kea 了...