21 lines
952 B
Markdown
21 lines
952 B
Markdown
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---
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date: 2025-04-12T21:18:30+01:00
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draft: false
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title: Setting up Unique Local Addresses (ULA) on OPNsense
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tags:
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- Post
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- IPv6
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- Networking
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---
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Setting up unique local addresses on OPNsense is very easy however not very well documented. This is how to configure then
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Firstly create a unique local IPv6 prefix. This should be according to RFC4193. You can use this website (or similar websites) to generate the address.
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https://www.unique-local-ipv6.com/#
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Next, create a virtual IP on an interface with the desired IP for said interface. From the generator you will receive a /48 network, pick a subnet from this address range for your local network.
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For example I used the virtual IP `fd7a:18a6:838d::1/64` for my LAN interface.
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The router should be reachable using the address configured an should router advertisements be configured correctly then nodes on that network should generate a their own unique local address on that network!
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