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Date:      Fri, 12 Aug 2016 03:20:39 +1000 (EST)
From:      Ian Smith <smithi@nimnet.asn.au>
To:        "Dr. Rolf Jansen" <rj@obsigna.com>
Cc:        freebsd-ipfw@freebsd.org
Subject:   Re: your thoughts on a particualar ipfw action.
Message-ID:  <20160812014005.V79687@sola.nimnet.asn.au>
In-Reply-To: <DA5B5C46-9505-4A3E-948A-7392844F21C3@obsigna.com>
References:  <20160805024301.H56585@sola.nimnet.asn.au> <B26AAEC0-593A-46D9-A22F-F6B4B78E7E8E@obsigna.com> <7486c7ce-49db-b6b9-a6bb-13f04b4ce6d6@freebsd.org> <F3D40C57-831D-4A7C-B84B-8DA34E4DC701@obsigna.com> <242DF6D8-4287-43BF-BE9F-CE1665D31ED2@obsigna.com> <9D024314-57A2-4079-B630-FB0D844DD5B5@obsigna.com> <20160811200425.F79687@sola.nimnet.asn.au> <DA5B5C46-9505-4A3E-948A-7392844F21C3@obsigna.com>

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On Thu, 11 Aug 2016 10:09:24 -0300, Dr. Rolf Jansen wrote:
 > > Am 11.08.2016 um 08:06 schrieb Ian Smith <smithi@nimnet.asn.au>:
 > > On Wed, 10 Aug 2016 -0300, Dr. Rolf Jansen wrote:
 > > 
 > > (just curious: whereabouts is -0300?  Brazil?)
 > 
 > Yes, I am a German living in Brazil for more than 10 years now. BTW, 
 > your mail provider is blocking my mails, perhaps, because the origin 
 > is Brazil, but I am using a German provider for my mail transport.

Oops.  You should have mail from smithi@someisp about sorting that out? 
Cutting to recent:

 > > Terrific work, Rolf!  Something for everyone, although I'm guessing the 
 > > pf people are going to want a piece of the action, if they need any more 
 > > than the -p option and a bit of scripting.
 > 
 > It is not that much work, to add other output options. The main 
 > obstacle for me is, that I won't be able to test it carefully 
 > together with pf. So, it would be good to do this in cooperation with 
 > someone who got a well running pf firewall -- the same holds for 
 > other possible applications as well.

Indeed.  Once again I've suggested something I can't help with and know 
next to nothing about :)

 > >> I just submitted a PR asking to add the new port 'sysutils/ipdbtools'.
 > >> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211744
 > > 
 > > Wonderful.
 > 
 > The port maintainers were really quick. The port has been accepted 
 > and has been already committed.

So it has, on refreshing the page.  Smooth and fast.

Re __uint128_t I _guess_ there may be macro/s to do that maths for i386?

 > >> With the great help of Julian, I was able to improve the man file and
 > >> the latest version can be read online:
 > >> 
 > >>  https://cyclaero.github.io/ipdb/
 > > 
 > > Nice manual and all.  A few typos noted below (niggly Virgo proofreader)
 > 
 > I was tempted to get these last changes into my PR, but I am sorry, 

Not at all; nothing that might confuse or deter anybody .. niggles.

 > it was too late for the initial release. I committed the corrected 
 > man file to the GitHub repository, though, it will automatically go 
 > into the next release of the ipdbtools, perhaps together with some 
 > additions for using it together with pf(8) and route(8).

Great.  Looking forward to having a play, albeit on a box not running 
any external services currently, to scope it out.

 > Nothing, to be sorry about. I like discussions.

Ok, no sorrow either way ..

 > > As a hopefully not unwelcome aside, it's a pity that IBM, of all people, 
 > > couldn't manage geo-blocking successfully for the Australian Census the 
 > > other night.  Next time around we can offer them a working geo-blocking 
 > > firewall/router for a good deal less than the AU$9.6M we've paid IBM :)
 > > 
 > > Census: How the Government says the website meltdown unfolded:
 > > http://www.abc.net.au/news/2016-08-10/census-night-how-the-shambles-unfolded/7712964
 > > 
 > > A more tech-savvy article than ABC or other news media managed so far:
 > > https://www.theguardian.com/australia-news/2016/aug/10/computer-says-no-australian-census-shambles-explanation-depends-on-who-you-ask
 > 
 > Well, I tend to believe that this has nothing to do with DoS attacks, 

Some should have been expected, planned for, mitigation anticipated, as 
well as expecting at least 5 times the legit connections/hr they tested 
for, and as the guardian article pointed to, their DNS was screwed in 
several ways: way too long TTL (can't move fast), hard-coded subdomain 
in SSL cert (couldn't readily add load-sharing capacity?) and such.

But they admit the geo-blocking fell over - whether inline as firewall 
or on another server fielding lookup requests not disclosed - but they 
say that failure caused a/the/some router to fail (crash? explode? :)

IBM, FFS! but they'll point to govt specs and disclaim hardware failure 
but still it's not great product endorsement for their SoftLayer Cloud.

 > I mean, of course it is DoS, but not caused by an attack. Exactly the 
 > same happens every year on 30th of April between 17:00 and 24:00 on 
 > the servers of the Federal Bureau of Finance here in Brazil. That is 
 > the deadline for the online-submission of the annual tax declaration 
 > of the Brazilian citizens. Seems that the bureaucrats all over the 
 > world share the same deficiency of creative problem solving.

Seems it's a requirement for the job, world wide.  Creativity is scary, 
but you think they could guess that ~8 million households in the eastern 
timezone were going to have dinner then do their census within ~2 hours.

 > Who in the bureaucrats hell told them to go with one deadline for 
 > everybody? For the census in Australia, I would have told the 
 > citizens that everybody got an individual deadline which is his or 
 > her birthday in 2016 -- problem solved.

That'd be great load-balancing .. shall I let them know? :)

 > > It's not quite clear how to specify an 'empty CC list'? ''? ""? either?
 > 
 > Well, in the Synopsis and in the description of the second usage form 
 > there was already ... | "". Now, I clarified this in the description 
 > as well as follows:
 > 
 > "An empty CC list (denoted by "") means any country code."

Clearer; my old browser was rendering "" to look like '"' ie misspaced.

 > As already said, the corrections are not part of the initial release 
 > into the FreeBSD ports, for this one it was too late. The man file on 
 > GitHub is corrected already.
 > 
 > Best regards
 > 
 > Rolf

All good.  Even better when I find what's blocking your host|IP.

cheers, Ian



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