At 03:37 PM 3/20/2014, Ronald F. Guilmette wrote:

Starting from these lines in my /etc/ntp.conf file:

server 0.freebsd.pool.ntp.org iburst
server 1.freebsd.pool.ntp.org iburst
server 2.freebsd.pool.ntp.org iburst

I resolved each of those three host names to _all_ of its associated
IPv4 addresses.  This yielded me the following list:

50.116.38.157
69.50.219.51
69.55.54.17
69.167.160.102
108.61.73.244
129.250.35.251
149.20.68.17
169.229.70.183
192.241.167.38
199.7.177.206
209.114.111.1
209.118.204.201

[Snip]

All of this is good. However, remember that anyone who can spoof IPs will know
that the above addresses are the defaults for any FreeBSD machine and can
take advantage of these "holes" in your firewall.

--Brett Glass
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