base__ssh_listen_mesh_only binds sshd to the live wt0 IP only, with
ip_nonlocal_bind to beat the post-boot bind race and a fail-closed assert so an
unresolved address never silently listens on all interfaces. Molecule covers
the render + sysctl. Mesh-hardening 1/3 (ADR-016/021).
Environmental checkpoint applied: the molecule-debian13 container image lacks
procps (no sysctl binary). Added molecule/default/prepare.yml to install procps
and sysctls: {net.ipv4.ip_nonlocal_bind: "0"} to molecule.yml platform so the
ansible.posix.sysctl task can write and read back the value hermetically.
Sysctl file format is net.ipv4.ip_nonlocal_bind=1 (no spaces); verify.yml
grep pattern updated to match ansible.posix.sysctl's actual output.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add explicit base__ssh_authorised_keys: [] default to prevent
undefined-var errors in Molecule. Extend verify.yml with sshd
drop-in validation, PasswordAuthentication check, and fail2ban
jail assertion. Pre-create /run/sshd in ssh.yml so sshd -t
works in containers before the service has ever started.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
established/related keeps the in-flight session alive across the swap, so the
prior 'next task runs' confirm always passed even if new connections were
bricked — the rollback was theater. reset_connection + wait_for_connection now
force a fresh handshake through the new ruleset; failure aborts the play and the
armed timer reverts. (meta: reset_connection ignores 'when' — benign extra
reconnect on no-op runs; verified idempotent in molecule.)
