An error in Handbook IPFW example

Benjamin Kaduk kaduk at MIT.EDU
Sun Oct 9 23:46:36 UTC 2016


On Sat, 8 Oct 2016, Petri Riihikallio wrote:

> About half way through https://www.freebsd.org/doc/handbook/firewalls-ipfw.html it says:
>
> > # Allow outbound NTP
> > $cmd 00260 allow tcp from any to any 37 out via $pif setup keep-state
>
> But that doesn’t allow NTP. NTP uses UDP 123. TCP 37 is the obsolete TIME protocol. (Unless I am completely at a loss, of course.)

It is probably best to report the issue at
https://bugs.freebsd.org/bugzilla/ so it will still be known even if no
one patches it right away.


-Ben


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