FreeBSD port net/ntp was marked forbidden because it is vulnerable to traffic spoofing and amplification attacks, as documented in CVE-2013-5211.However, there's been no support from the upstream provider, ntp.org.It would also appear that the developers were aware of the issues as early as 2011-December, and have not sought recourse other than to suggest configuration changes to mitigate the problem:http://lists.ntp.org/pipermail/pool/2011-December/005616.htmlWithout relying on FreeBSD's 'world' version of ntpd, what other packages are available to replace ntpd?
FreeBSD's net/ntp port is forbidden due to CVE-2013-5211, with no support upstream
freebsd;ntpd