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CHANGELOG: document strict version upgrade path

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Kristoffer Dalby
2026-02-16 14:21:04 +00:00
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CHANGELOG.md
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@@ -19,6 +19,10 @@ overall our implementation was very close.
- **Note**: Users with non-standard IP ranges configured in `prefixes.ipv4` or `prefixes.ipv6` (which is unsupported and produces a warning) will need to explicitly specify their CIDR ranges in ACL rules instead of using `*`
- **ACL Policy**: Validate autogroup:self source restrictions matching Tailscale behavior - tags, hosts, and IPs are rejected as sources for autogroup:self destinations [#3036](https://github.com/juanfont/headscale/pull/3036)
- Policies using tags, hosts, or IP addresses as sources for autogroup:self destinations will now fail validation
- **Upgrade path**: Headscale now enforces a strict version upgrade path [#3083](https://github.com/juanfont/headscale/pull/3083)
- Skipping minor versions (e.g. 0.27 → 0.29) is blocked; upgrade one minor version at a time
- Downgrading to a previous minor version is blocked
- Patch version changes within the same minor are always allowed
- **ACL Policy**: The `proto:icmp` protocol name now only includes ICMPv4 (protocol 1), matching Tailscale behavior [#3036](https://github.com/juanfont/headscale/pull/3036)
- Previously, `proto:icmp` included both ICMPv4 and ICMPv6
- Use `proto:ipv6-icmp` or protocol number `58` explicitly for ICMPv6