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“IPv6-Präfixe würfeln”– Was soll das?

Seit Monaten sieht man auf heise online an der rechten Seite den Link zu einem Artikel namens “IPv6-Präfixe würfeln“. Dabei geht es darum, OpenWRT einen Teil des IPv6-Präfixes innerhalb gewisser...

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Idea: IPv6 Dynamic Prefix

For dynamic IPv4 addresses, dynamic DNS services such as Dyn or No-IP are well-known. If an ISP issues a single dynamic IPv4 address every 24 hours (or the like), the router or any other device...

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Telekom Dual-Stack Verbindungsaufbau

Bis neulich hatte ich einen normalen DSL-Anschluss von 1&1: Per PPPoE eingewählt und eine IPv4-Adresse bekommen – fertig. Das kann neben der FRITZ!Box natürlich auch jeder vernünftige Router oder...

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Juniper ScreenOS: DHCPv6 Prefix Delegation

The Juniper ScreenOS firewall is one of the seldom firewalls that implements DHCPv6 Prefix Delegation (DHCPv6-PD). It therefore fits for testing my dual stack ISP connection from Deutsche Telekom,...

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IPv6 VPN Routing with Dynamic Prefixes

How to route traffic inside an IPv6 site-to-site VPN tunnel if one side offers only dynamic IPv6 prefixes? With IPv4, the private network segments were statically routed through the tunnel. But with a...

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IPv6 Dyn Prefix Problems

I am lucky to have a full dual-stack ISP connection at home. However, the ISP only offers a dynamic IPv6 prefix with all of its disadvantages (while no single advantage). In this post, I am summarizing...

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TROOPERS18: Dynamic IPv6 Prefix Problems and VPNs

Just a few days ago I gave a talk at Troopers 18 in Heidelberg, Germany, about the problems of dynamic (non-persistent) IPv6 prefixes, as well as IPv6 VPNs in general. Following are my slides and the...

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#heiseshow: IPv6 setzt sich langsam durch – die wichtigsten Fragen

Ich durfte zu Gast bei der #heiseshow zum Thema IPv6 sein. In Anlehnung an die Artikelserie über IPv6 in der c’t 7/2022, in der auch mein Artikel über die Vorteile von IPv6-Adressen erschienen ist,...

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DHCPv6 Prefix Delegation

What is DHCPv6 Prefix Delegation? Coming from IPv4, you’re already familiar with DHCP (for IPv4) which hands out IPv4 addresses to clients. The same applies to (stateful) DHCPv6: it hands out IPv6...

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DHCPv6 Prefix Delegation on Palo Alto’s NGFW

Finally! With PAN-OS 11.0 a long missing IPv6 feature was introduced: DHCPv6-PD aka prefix delegation. For the first time, we can now operate a PAN-OS firewall directly on the Internet (the...

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DHCPv6 Prefix Delegation on a FortiGate Firewall

I got DHCPv6-PD aka prefix delegation up and running on a FortiGate. Yes! ✅ Configuring it is tricky since it’s not always clear which options to use. You cannot see everything in the GUI (it even...

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