The ntp.conf hardening used `interface ignore wildcard` +
`interface listen 127.0.0.1`, which binds ntpd to loopback only. Outbound
NTP queries to the upstream servers then carried a 127.0.0.1 source
address that the servers cannot reply to, so the daemon's peers stayed
stuck in .INIT. with reach 0 — even though the servers are reachable
(verified: ntpdate -q succeeds, ntpd does not).
Replace the interface-based restriction with restrict-based hardening:
`restrict default ignore` blocks unsolicited queries from any host (so
the box never serves time to others), while explicit allow rules for the
two upstream servers and localhost let the client sync normally.
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Route every host built by this project through the new
pfv-netinfra-01 (192.168.3.252) / pfv-netinfra-02 (192.168.3.253)
pair for both name resolution and time, with automatic failover.
- NTP: replace the single pfv-netboot.knel.net upstream with both
netinfra servers (iburst) so time sync survives either one failing.
- DNS: add a managed static /etc/resolv.conf (new ConfigFiles/Resolv/).
The repo previously had no resolver configuration at all. Both servers
are listed so glibc falls through to the secondary on failure.
- DHCP: request domain-name-servers/domain-search/ntp-servers and
supersede them to the netinfra pair, so a DHCP renew can't silently
revert to whatever the DHCP server advertises.
- SetupNewSystem.sh: deploy resolv.conf (robustly replacing any
systemd-resolved/NetworkManager symlink) and add pfv-netinfra to the
NTP-server self-exclusion guard so those boxes don't client off
themselves.
LAN IPs are used throughout (not the knel.net hostnames) because those
hostnames resolve to Tailscale CGNAT addresses, not the LAN addresses,
and NTP must come up before DNS. Add a validation test asserting the
config is present and both servers actually answer DNS and NTP queries.
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Assisted-by: GLM-5 via Crush <crush@charm.land>
29 files under ProjectCode/ConfigFiles lacked a trailing newline. They
deploy via `cat file > target`, and several targets are subsequently
appended to (notably /etc/ssh/sshd_config, which configure_ssh_2fa
appends `AuthenticationMethods publickey,keyboard-interactive` to).
Without a trailing newline the append fused onto the last line,
producing `LoginGraceTime 60AuthenticationMethods ...`, which sshd -t
rejected as an invalid time value and aborted provisioning under errexit.
This is the same defect class that already broke the managed
authorized_keys files. Add the trailing newline to every config file
that was missing one so the cat-then-append pattern is always safe.
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mrcharles