The narrative during the exercise is that there is some tension
between two fictive countries, Berylia and Crimsonia. Berylia might be
attacked by Crimsonia at any time, especially in the cybers. The blue
team is part of an expert team dropped into Berylia to help them
Through $DAYJOB I was invited to join the
Swedish blue team for Locked Shields 2019 in April this year. The
Swedish part of the exercise was held at Swedish Defence
University in Stockholm.
The actual exercise was just two days but we had three initial
training days to familiarize ourselves with the network and the
machines, prepare our tools and our own version control systems. There
were about 150 machines: some Windows boxes, some Linux boxes, some
industrial control systems, different firewalls, routers and switches.
After some initial confusion I ended up in the newly created Apps
subteam. We took responsibility of all the Berylian in-house software,
the development systems, the continous integration and the Docker
swarm. Everything was, of course, rather broken and insecure. I was
really impressed by the people who had been setting this up.
The CCDCOE red team started attacking our systems almost immediately.
We had our hands full trying to harden the systems, fixing things,
reporting cracked systems and coordinating with other subteams.
The Berylian software developers themselves were curiously missing
during the entire exercise but their users were present and
complaining about systems that didn't work.
Several times other subteams had hardened their part of the network
and effectively brought our systems down by, for instance, demanding
strong authentication and encrypted connections which the Berylian
software didn't support. We had to add features like that on the fly.
At times things were miserable but all in all we learned much and had
a lot of fun.
The Swedish team ended up in third place! Congratulations to the French
and Czech teams!
Found this beauty, an LM Ericsson m/50, in a second hand shop. It was
made between 1947 and 1962. Initial testing makes me believe it
actually still works. I've done some testing with an ATA box as well.
It would be very funny to have this as a SIP phone.
The new fiber connection to my little cottage in the woods recently
I've had a maxed out ADSL giving me something like 8/2 Mbit/s since we
bought the cottage. With ~3 km of old copper cables I couldn't get any
higher bandwidth but on the other hand I got customized customer
support over IRC! Thanks, Philip! Too bad my old ISP didn't get enough
interest for fiber here in the woods. Telia/Skanova is increasingly
abandoning the copper network under the euphemism The Network of the
Future, often leaving
people depending on ADSL with only capped and metered mobile network
as the only alternative.
With the new fiber I could have had a full symmetric gigabit/s but it
was rather expensive and most of my stuff here can't even get to those
speeds over wireless, so I settled for a symmetrical 100 Mbit/s.
Plenty of bandwidth for most stuff and especially the upstream
(backups, anyone?) is now really nice.
It's kind of strange that I still don't have a fiber connection to my
flat in the city but a fiber connection to my weekend cottage. In town
we're in a house with Internet over cable TV cables. Granted, it's
something like 250/10 Mbit/s, but still not fiber.
On the other hand, the new fiber connection doesn't have IPv6 and not
even real v4 adresses since they use CG-NAT. I've asked the ISP about
a public v4 address. Rumours has it that they even have a 6rd gateway
somewhere, but of course I can't use it behind CG-NAT.
I'm trying to think about my bandwidth history at home. Something
1987 300 b/s dial-up.
1988 1200/75 b/s dial-up.
1989—1995 2400 b/s dial-up.
1995—1997 9600 b/s dial-up.
1997—1998 19.2(?) kb/s leased line in the T1 collective shared with
1999 ISDN (2 * 64 kbit/s) in the area 41 collective, shared with
three other adults.
2000–2001 Telia cable TV Internet.
2002–2004 ADSL, something like 2/1 Mbit/s. Static IP!
~2004–2006 - VDSL 10 Mbit/s!
2006–2011 Ethernet 10 Mbit/s later upgraded to 100 Mbit/s.
2011–now (in town) DOCSIS cable TV 100/10, later increased to 250
2015–2019 (cottage) ADSL 8/2 Mbit/s.
2019–now (cottage) Ethernet 100 Mbit/s.
What does your Internet connection look like at home?