This page describes the concept NWWC.

Mainly NWWC are events held at our house and private garden, with friends.

Registration required. Email me at hkj @ kramse.o r g if you want to join.

Corona passport needed!

The setting is much like BornHack but smaller. Code of conduct from Bornhack applies!

Picture from my garden, house is very close to nature.

the garden


We are planning the following events:

  • NWWC-2021-07 - July Friday July 9. 10:00 until Sunday 11. 17:00
  • NWWC-2021-10 - October Friday 29. 10:00 until Sunday 31. 17:00

I start the build-up in the morning and you are welcome to join around 10:00 +/- 1 hour is ok. When we finish I will ask you to pack up around 17:00 and leave in good order :-D.

Registration needed, also if you just want to join a few hours on saturday or sunday!

There is no price on this event, but a small donation of 50kr per participant will allow me to buy coals, condiments and some bread etc. for the BBQ.

What is it

An open space for people to be more social when hacking on whatever project they want. I typically work on projects that require more setup and focus than is available during daytime in normal work weeks.

Consider it an extended garden party where it is okay to bring your laptop, so you can hack and discuss tech while drinking tea, coffee, soda, beers, water, vodka and eating snacks!

We have typically built a common tent and hack through the night, no need to put away your stuff - just hack on!

Since moving to a new house in September 2020 we have both inside and outside facilities, and Wi-Fi available for most of the area close to the house!


I work in network and security, both subjects that I find interesting. Both of these have new developments, new tools. Some which require effort to learn.

Sitting together accellerate learning, as you can ask 20 people at once, who know a good DNS library, and how to X. Quite often someone will know the answer.

Helping others, while learning a lot yourself.

So my projects often involve setting up a small infrastructure with networking, 10Gbit, firewalls, routing and routers - and then do some experiments.

I have a wide range of equipment like Juniper SRX, OpenBSD PF, Linux devices, Raspberry Pi's, switches, access-points etc. Ask me before you bring something heavy, I might have it already. :-D


It resembles a temporary hackerspace where you can sit and hack around the clock, and sometimes the best time is at night when everyone is focused on something and you see the glow from the laptops onto smiling faces.

Fiber 1000/500 with Ethernet and Wi-Fi. Normal danish house power 230V - moderate power available.

Other stuff, like Pets and kids

Note: We have a very friendly dog. She is about 16kg and eager to greet you. In general don't bring pets, and if you have a service dog, lets discuss.

WARNING: Our house is NOT suitable for small kids! You may bring them, but they are your responsebility. Doors open directly to the roof, and outside stairs go from ground level without any rails!

house overview showing roofs with no rails


Bring your own food. We have shops SuperBrugsen and Netto 2kms from the house in Blistrup.

We typically do a barbecue every day - so bring or buy something to put over the fire. If you do not eat meat please note we do not have special kitchenware ... and there might be only a single BBQ.

Some fridge space will be available. Kitchen is also free to use, with cleanup by you! Dishwasher available.


We have quite a big house with three working toilets, but only one bath. If its free, take a bath if you like.

We have a few places in the house where you can sleep, but dont count on it without confirmation. A better alternative is to bring a tent, or borrow one of mine. Ask before if I have a tent available. I also have a camping caravan which can sleep a few people.

Another option is to borrow, rent a house nearby. There are large areas with summer houses in walking distance, and we might be able to put you into contact with someone nearby.


House is at Enghaven 9, 3230 Græsted. There is room for parking both smaller and larger vehicles including camping caravans.

There are trains through Hillerød, change to local trains, then to Græsted or Helsinge. We can probably arrange pickup from me or someone else at those places. There are also busses, and one stop 500m away at Blistrup Skole, Toftegårdsvej 6, 3230 Græsted.

My Keywords

Ethernet, Layer2, Layer3, SNMP, OSPF, BGP, firewalls, routers, switches, syslog, ACL, security, denial of service, syn flooding, Kali Linux, Nmap, portscan, Kibana, Elasticsearch, Suricata, Bro-IDS, Metasploit, 802.1q, 802.11, 802.1x, STP, BPDU guard, IPv4, IPv6, ICMPv6, NTP, Cisco IOS, 802.3ad, Junos, DDoS, pktgen, t50, hping, Kali Linux, ARM, FPGA, Netflow, Netconf, burgers, beer, danish hygge