Majornetwork

Gateway of last resort is not set

Month: December 2023

IKEv2 AES-256-GCM and SHA-384, what?

December 13, 2023

What has this SHA-384 to do with AES-256-GCM? I thought GCM contained integrity checks already, so why is SHA-384 there anyway? With AES-CBC (= non-GCM) in IKEv2 phase 1, you have to use an authentication (hashing) algorithm that ensures the integrity of the data exchange. Nowadays the common ones are SHA-256, SHA-384 and SHA-512. So, […]

DHCPv6 Relay

Markku Leiniö

December 6, 2023

Networking

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Following my earlier post about introduction to DHCPv6, let’s see how DHCPv6 relaying works in practice. In VLAN 60 there is the DHCPv6 client but no DHCPv6 server. The subnet-attached router is configured as DHCPv6 relay, using the DHCPv6 server address from VLAN 41. The components in this setup are: I’ll capture the traffic on […]