Re: version of OpenBSD and PF

On 03/23/2015 09:58 PM, Peter N. M. Hansteen wrote:
> Mohsen Pahlevanzadeh <[email protected]> writes:
>
>> As you know, version of PF related of openbsd's release, And since of
>> of a specific version of OpenBSD, PF syntax has been rewritten. i have
>> two question :
>> 1. What's the given openbsd version?
> Depending on how you count, there were either two or three flag day
> changes (or actually more when I think back, but perhaps not
> immediately obious syntax-wise)
>
> 1) 'keep state' becoming the default in OpenBSD 4.1 -- but everybody's
>     forgotten about that one, mainly because FreeBSD and NetBSD back then
>     adopted the change relatively quickly
>
> 2) the NAT rewrite and syntax change (nat-to, rdr-to etc) in 4.7 --
>     old rule sets will break, in almost all cases easily fixable, and
>     the new syntax is lots more flexible anyway (and the reason The
>     Book of PF needed a second edition)
>
> 3) the introduction of new queueing system in 5.5 - again an
>     opportunity to make the rulse more readable and offering more
>     flexibility, at the cost of at least some (mostly quite easy)
>     conversion. (and the reason there is a third edition of that book)
>
> There have been several other significant changes over the years,
> including a fairly complete rewrite of the logging code and various
> bits and pieces.
>
> My tutorial slides has a partial list of significant developments
> starting at http://home.nuug.no/~peter/pf/newest/design-evolution.html
> but it's not exhaustive.
>
>> 2. hwo can i retrive the given openbsd and pf version?
>>
>> Why i asked same question?  i'm writing article about PF and i explain
>> version and synyax error.
> OpenBSD officially supports the two most recent releases, and
> essentially all development work happens on -current, with the bits
> that get done in time to be included in the next release. At this
> moment the oldest supported release is 5.5, which is the last to
> include both the old ALTQ code and the new queueing system. Running
> older, unsupported versions is not recommended.
Unfortunately ,I couldn't explain my purpose, Of course, OpenBSD.org  
show it,  I use FreeBSD , I  need to find out my pf is related to which 
release of openbsd...via some grep in /usr/src or etc ....
> If you're writing an article on PF, consider keeping things simple for
> yourself and focus on OpenBSD exclusively. Otherwise you'll end up
> compensating for and explaining the fact that the others (NetBSD,
> FreeBSD, Apple) have let their PF code fossilize at various oddly
> chosen points in time that don't make much sense at all for newcomers.
>