Single-site bay-stuck issue at WJ: GE Intune Report IP script filters
Get-NetIPAddress on StartsWith("10.") and posts everything matching
to the GE Tines webhook. Bays at WJ get the PXE LAN 10.9.100.x IP
captured and reported -> GE backend tags bays as on a non-corp 10.x
subnet -> dynamic group eligibility for SFLD policy never matches.
Other GE sites work because their PXE LANs aren't on 10.x at all.
Renumber PXE LAN to RFC1918 172.16.9.0/24 so the GE filter naturally
skips wired PXE addresses without any disable-NIC dance.
Server-side already in flight (netplan dual-bound, dnsmasq scope +
boot URL repointed, blancco preferences + grub.cfg + iPXE GetPxeScript
all sed'd to 172.16.9.1). This commit is the playbook / scripts /
docs side: 109 hits across 35 files sed'd in one shot.
After this lands + boot.wim is rebuilt + bays renumber off DHCP,
the 10.9.100.1 binding will be dropped from netplan as the final
cleanup step.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
WinPE clients re-imaging the same machine hit "System error 53 -
network path not found" on the second attempt. systemctl restart smbd
did not help; only a full server power cycle cleared the state.
Root cause is kernel nf_conntrack: the default TCP ESTABLISHED timeout
is 5 days (432000s), so a session from the first WinPE run whose
client rebooted abnormally leaves an ASSURED ESTABLISHED entry that
ufw's state-tracking rules then mis-classify the new SYN against.
Fix applied in three layers:
- /etc/sysctl.d/99-pxe-conntrack.conf drops TCP ESTABLISHED timeout
to 1 hour and shortens the half-closed states to 30s each.
- smb.conf gains socket options TCP_NODELAY SO_KEEPALIVE IPTOS_LOWDELAY
plus keepalive = 30 and deadtime = 5. Active sessions refresh the
conntrack timer every 30s via keepalives so they never age out;
dead ones expire in an hour.
- /usr/local/sbin/smb-diag.sh snapshots kernel + Samba state for
remote diagnosis; /usr/local/sbin/smb-soft-reset.sh walks a
progressive recovery (nmbd/smbd restart, conntrack flush, arp
flush, ss -K) as an alternative to power-cycling.
conntrack package added to download-packages.sh and playbook verify
list so the offline .deb bundle ships with it.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
