1,926 reputation
213
bio website steffann.nl
location Apeldoorn, Netherlands
age 37
visits member for 2 years, 9 months
seen yesterday

I started working in the Internet industry in 1995, when I helped to start up Computel Standby BV. I supported Computel while I was a student at Universiteit Twente. Computel started in Apeldoorn (NL) as a small ISP, started the Nederland.net foundation, and has grown into a server management company with its own small datacenter.

I became a RIPE Address Policy Working Group chair in May 2007, mostly because I am interested in the future of the Internet and I like to participate in things I think are important.

In May 2008 I left Computel and started working for Max.nl, which is a web application development company. In March 2010 I started my own company. I am focusing on internet infrastructure related subjects such as IPv6, routing and security. Since October 2010 I have been doing IPv6 related projects exclusively.


Apr
16
comment Linux 6in4 tunnel server can't properly forward IPv6 packets due to failing neighbour discovery
Sorry to hear that :(
Apr
16
answered Linux 6in4 tunnel server can't properly forward IPv6 packets due to failing neighbour discovery
Apr
12
comment Why is ARIN (etc.) allocating such large blocks of IPv6 addresses?
Having to ask for more than a /64 is not smart of an ISP. Many setups need more than one /64 (e.g. home LAN and guest LAN) and (a) it will cost them money if their support desk has to handle these requests and (b) most users will not know what to ask so (c) devices will start hacking around this with NAT etc. While the ISP has all the IPv6 addresses they need for free, up to giving each customer a /48.
Apr
8
comment Static IP from some other ISP
TomTom: please specify the region that you are talking about. The policies here in the RIPE region at least don't match your description. Here Provider Independent IPv4 addresses haven't been available since September 2012
Mar
22
revised Exercise regarding public IP address and its “class C”
Fix typo
Mar
19
comment Exercise regarding public IP address and its “class C”
@Iain: I rest my case :)
Mar
19
comment Exercise regarding public IP address and its “class C”
I'm not sure if this question is really off-topic here. Although it is about an (outdated) exercise question, these still seem to be a lot of professional system administrators that are stuck in the pre-CIDR era. A bit of explanation on how the internet works these days might therefore be on-topic.
Mar
19
revised Exercise regarding public IP address and its “class C”
added 556 characters in body
Mar
19
comment Exercise regarding public IP address and its “class C”
Getting back to the OP's question: I'll expand the answer on that
Mar
19
comment Exercise regarding public IP address and its “class C”
@Iain: ok, then the OP should tell the tutor that ;) Yes, I realise that this isn't always possible, but tutors still teaching this 20-year-old stuff should be considered a risk to the stability of the internet :)
Mar
19
answered Exercise regarding public IP address and its “class C”
Mar
9
comment Fully disable IPv6 for rpc on NFS server - Ubuntu 12.04 LTS
Just wondering: Why do you want to turn off IPv6 so badly? And why is it a problem that the kernel NFS server is bound to an IPv6-capable socket when you don't have any IPv6 addresses on your host? You won't get any incoming IPv6 traffic without having IPv6 addresses anyway.
Mar
5
comment Cisco IOS: Prevent Inter-VLAN IPv6 Network Solicitation messages
I have never seen such behaviour. Can you include a tcpdump or equivalent that shows that the router really sends out those router advertisements and that it is not e.g. the switch that messes up the VLANs?
Mar
1
comment Automatically acquire IPV6 address in CentOS 6
Try turning off IPV6FORWARDING. If forwarding is enabled autoconf is automatically disabled.
Feb
20
answered Many 'Deny IPv6-ICMP reverse path check' alerts from multicast addresses on Cisco ASA
Feb
19
reviewed Reviewed Forward web request to another computer
Feb
19
reviewed No Action Needed Good PC-based video conference control tools?
Feb
5
comment Why does NTP daemon keep listening on UDP6?
It's listening on localhost on both IPv4 (127.0.0.1) and IPv6 (::1). Are you sure you haven't configured it to listen on localhost? Or maybe it always listens on localhost. Not sure about that. In either case it will not hurt.
Jan
23
comment Routing single v6 /64 range to virtual machines
@mr.b: If they just gave you one /64 then they are not sensible at all... I have implemented (or consulted for ISPs that were implementing) IPv6 many times, and nowhere was a /64 a good choice. It's a sure way to cause issues for customers.
Jan
23
comment Routing single v6 /64 range to virtual machines
Oh, and to really answer your question: you'll have to bridge at layer-2 if you want to use a single /64 for your host as well as for your virtual machines.