Just recently we discussed IPv6 filter rules for NIC-level firewalls (in a virtualized data center) with a customer. I’d like to take this as an opportunity to lay out potential approaches for local packet filtering of IPv6, which in turn might somewhat depend on the address configuration strategy chosen for the respective systems (for the latter you may refer to this post or to this talk from the Troopers NGI event).Continue reading
I’m on my way back from the RIPE74 meeting in Budapest. It was a great event: quite a few nice technical talks in the plenary, productive working group meetings and some really good hallway discussions.
Big thanks to the RIPE NCC team for the smooth organization and for taking care of us!
Given the CfP for Black Hat US in Vegas ends in a few days – and as apparently some people have already started to think about their TR18 submissions – I’ll quickly provide some loose recommendations on how to write a submission here. There’s quite some reasonable advice out there already (the BH CfP site lists this and this which you should both read as well) but some of you might find it useful to get (yet) another perspective. Continue reading “Some Quick Tips for Submitting a Talk to Black Hat or TROOPERS”Continue reading
When doing IPv6 security testing there’s mainly four toolkits which can be used: Continue reading “Testing RFC 6980 Implementations with Chiron”Continue reading
In this post we’ll take a detailed look at the properties of the Windows Server 2016 IPv6 stack.
I perform(ed) this exercise for several reasons:
In this post I’ll discuss configuration approaches for systems which usually have been configured with “static” IP parameters in the IPv4 age/context (like servers in data centers). When it comes to IPv6 there are more options and we’ll have a look at their implications and potential advantages/disadvantages.Continue reading
This is the 3rd part of this loose series on considerations of (operating) DMZs in 2016 (part 1 on the role of a DMZ is can be found here, part 2 on reverse proxies here).
Again, I dare to deviate a bit from the plan & order I initially had in mind – today I will cover one process whose maturity may significantly influence the overall security posture of a DMZ environment: firewall rule management.
How to provide updates to IoT devices – yes, I’m aware this might be a overly broad generalization for many different devices – has been the topic of many discussions in the last years (for those interested the papers from the “Internet of Things Software Update Workshop (IoTSU)” might be a good starting point).
Given Matthias and I will moderate the respective session at tomorrow’s IoT Insight Summit I started writing down some points that we consider relevant in this context.
As we all know an IPv6 enabled host can have multiple addresses. In order to select a source address for a to-be established outbound connection, operating systems implement a source address selection mechanism that evaluates multiple source address candidates and selects the (potentially) best candidate. Criteria for this selection are defined in RFC6724 (which obsoletes RFC 3484).Continue reading
Some years ago I discussed the meaning of the term “control” in this post, but at the time I was mainly referring to the noun “control”. Given I’ll extensively use the term “control” as a verb in the next parts of “the DMZ series” and some upcoming talks I reflected a bit on its meaning (as a verb). In the following I’ll lay out the definition/understanding to be employed at those occasions.Continue reading