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spinifex/docs/security
Josh Siviour 93a15c1a8f docs: reconcile the listener inventory with the listeners that exist (#767)
The inventory was missing northstar (53 on the advertise address, 5300 on the
wildcard and dialled cross-node by every node's per-instance DNS shim), charon
(500/4500 plus ESP), Geneve 6081, the per-instance IMDS and VPC-DNS listeners,
and chronyd. Section 6 asks the operator to compare the table against ss -tulnp,
which was not possible while six listeners were absent.

Two classifications were wrong. 8443 was Cluster, but predastore binds the S3
gate to 0.0.0.0 deliberately because S3 is a public plane. 4432 was External,
but it binds the node's --bind address and is transient.

The scope vocabulary predated the three-plane model, so it could not express the
encap plane or record that a node with fewer NICs collapses the planes onto its
public address. Cluster and Encap now state intent rather than a guarantee.

Replaces the reference nftables ruleset. The previous one had no conntrack,
loopback, ICMP or ime-* rules and ended in a blanket drop, so an operator who
applied it lost guest metadata, guest DNS, all egress return traffic and their
own SSH session. The replacement is input-only in a dedicated table, because
nftables verdicts are per-table and a default-deny forward chain would override
the accepts vpcd writes to ip filter and break every routed-NAT instance.
2026-08-12 12:47:47 +10:00
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2026-04-17 16:09:06 +10:00
2026-07-09 09:43:31 +10:00
2026-04-17 15:27:14 +10:00