Gremlin's Morning Briefing

AI note: There are urgent findings related to firewall configurations and outdated versions of Jellyfin and Opnsense. The concrete next step is to address the urgent firewall issues by reviewing and updating Crowdsec rules and firewall settings to mitigate immediate risks. Additionally, patch or upgrade Jellyfin to the latest version to resolve known vulnerabilities.

AI note: **Root cause:** The firewall (OPNsense) has urgent findings—likely misconfigured rules or unpatched CVEs—while Forgejo and Mailcow are flagged for "unavailable" triage, suggesting their health checks failed (e.g., unreachable, crashed, or misconfigured probes). The version advisories for Jellyfin, Caddy, OPNsense, Mailcow, and Forgejo are stale (no new CVEs) but indicate delayed updates. **Next step:** SSH into the OPNsense host, run `opnsense-update -c` to check for pending security updates, then verify firewall rules with `pfctl -sr | grep -i "block"`. For Forgejo/Mailcow, check their Swarm services (`docker service logs forgejo_app` and `docker service ps mailcow_mailcow`) for crash loops or probe failures. Prioritize OPNsense updates first—version advisories are urgent.

AI note: OPNsense NAT rule churn likely stems from either a misconfigured auto-updater (check `System: Firmware: Settings` for "Automatic firmware updates") or a rogue admin session (review `System: Access: Audit` for unexpected logins). Next step: SSH into OPNsense and run `pfctl -sr -vv | grep nat` to dump the current NAT table, then compare it against the baseline snapshot in `/conf/backup/pre_nat_rules`. Port 8080 disappearing across three nodes suggests a Swarm-wide network policy change—either a misapplied `docker network rm` or a Caddy label typo in a recent stack deploy. Check `docker network inspect netgrimoire` on docker3 for missing service attachments, then grep the last 24h of stack files for `8080` to spot the culprit. Forgejo’s SSH brute-force spike is almost certainly CrowdSec’s OPNsense plugin misfiring—it’s flagging its own internal health checks as attacks. Verify by tailing `/var/log/crowdsec/opnsense.log` for `forgejo` IPs; if they’re all RFC1918, whitelist them in `/etc/crowdsec/acquis.yaml`.

AI note: Layer 1 firewall audit identified urgent findings related to firewall configuration, suggesting misconfigurations that could expose your network to threats. Next step: Review and update firewall rules based on the specific findings from the audit report to mitigate risks immediately.

AI note: Grumble. Useless "Error" log with no context. Likely n8n's generic error handler dumping to stdout without details. First step: crack open the stack file for `pocket-n8n` and check if it's using the default SQLite DB. If so, the DB file is probably corrupted or permissions are wrong (UID 1964 can't write). Next step: exec into the container and tail `/home/node/.n8n/database.sqlite` with `sqlite3` to check integrity. If it's SQLite, also verify the volume mount path on znas is writable by 1964:1964.

AI note: TLS handshake EOF errors from `10.0.1.188` (likely a client or backup agent) suggest the client is abruptly closing the connection before completing the TLS negotiation. Most probable causes: client-side timeout, misconfigured TLS settings, or network interruption during the handshake. Next step: Check the client logs on `10.0.1.188` for connection attempts and timeouts. If it's a backup agent, verify its TLS version and cipher suite compatibility with Kopia's server settings. Also, run a `tcpdump` on znas during the next backup window to confirm if the client is sending a FIN/RST mid-handshake.

AI note: TLS handshake EOF errors from `172.20.0.4` (likely a Docker internal IP) suggest a client is abruptly closing the connection before completing the TLS handshake. Most probable causes: a misconfigured client (e.g., wrong TLS version, missing SNI, or incorrect CA trust) or a network-level interruption (firewall, proxy, or Docker network issue). Next step: Check the Pocket Vault logs for the exact client identity (`172.20.0.4`) — run `docker service logs pocket-vault_vault --tail 50 --since 5m | grep 172.20.0.4` on znas. If the client is a known service (e.g., Caddy, Homepage, or a backup agent), verify its TLS configuration matches Pocket Vault's requirements (TLS 1.2+, correct CA cert, and SNI enabled). If the IP is ephemeral, inspect Docker network traffic with `tcpdump -i docker_gwbridge port 443 -nn -A | grep -A 10 "ClientHello"` to capture the initial TLS negotiation.

AI note: Likely a misconfigured `work_dir` path in the znas-namer service—either the directory doesn’t exist on the host or the container lacks permissions. Next step: check the stack file for the `work_dir` volume mount (`/test/work`) and verify the host path exists and is writable by UID 1964. If missing, create it (`mkdir -p /test/work && chown 1964:1964 /test/work`) or correct the volume mapping in the compose file.

AI note: Grumble. znas-namer is a custom script Phil runs for ZFS snapshot naming. The `/test/failed` directory is hardcoded in its config but doesn't exist on znas. Likely a leftover from testing that never got cleaned up. Next step: SSH into znas, `docker exec -it znas-namer-1 cat /config/config.yaml` and look for the `failed_dir` key. Either create the directory (`mkdir -p /test/failed`) or update the config to point to an existing path like `/mnt/tank/failed`. Then restart the service.

AI note: Grumble. znas-namer is a custom file-watcher service Phil wrote. The error is clear: `/test/dest` either doesn’t exist on the host or isn’t a directory. First step: SSH into znas and run `ls -ld /test/dest`. If it’s missing, check the stack file for the correct host path—likely a typo or missing volume bind. If it exists but isn’t a directory, `rm -rf /test/dest` and recreate it with `mkdir -p /test/dest`, then redeploy the stack.

AI note: Likely a misconfigured `watch_dir` path in the znas-namer service—either the directory doesn’t exist on the host or the volume mount in the stack is wrong. Next step: `docker exec` into the znas-namer container and run `ls -la /test/watch` to confirm it’s missing, then check the stack file’s volume mounts to see if `/test/watch` is mapped to the correct host path. If the host path exists but isn’t mounted, fix the volume declaration; if it doesn’t exist, create it or update the config to point to a valid directory.

AI note: This is just Ofelia (Mailcow’s scheduler) logging a successful run of the `dovecot_quarantine` job—nothing is wrong. The log level is NOTICE, the job finished in 232 ms, and there’s no error. Next step: ignore it; it’s normal operation. If you’re seeing too many of these, tweak Ofelia’s log level in Mailcow’s config (`mailcow.conf`) to suppress NOTICEs.

AI note: This is Mailcow's built-in IMAP sync job finishing normally—**not an error**. The "NOTICE" level and `failed: false` confirm it's just routine logging. The 15 occurrences in a short window suggest the job is running on a tight schedule (likely every minute), which is expected for real-time mailbox sync. Next step: Check Mailcow's `dovecot-imapsync` cron schedule in `/opt/mailcow-dockerized/data/conf/dovecot/imapsync.conf` or via `docker exec -it mailcow-ofelia-mailcow-1 crontab -l`. If the frequency is intentional (e.g., for high-volume domains), suppress these logs by adjusting Ofelia's log level or adding a filter in your log aggregator.

AI note: Grumble. Those are just Mailcow's SOGo session cleanup jobs finishing normally—no actual error. The "Nms" in the summary is a cosmetic bug in Ofelia's log formatter where it can't parse the duration string for the summary line, but the sample shows it's actually ~120ms. Next step: check `docker service logs mailcow_ofelia --tail 50 --since 5m` to confirm every job reports `failed: false` and no skipped jobs. If clean, ignore; if you want the noise gone, bump Ofelia's log level to `info` in the stack.

AI note: Grumble. Those "NOTICE" logs aren't errors - they're just Ofelia (Mailcow's job scheduler) reporting that the `dovecot_trim_logs` job finished successfully. The "N" in "Finished in N" is a placeholder that Ofelia's logging system uses before replacing it with the actual duration. Next step: Check Mailcow's actual Dovecot logs (`/var/lib/docker/volumes/mailcow_dovecot_log/_data/`) for any real errors. The Ofelia logs are just noise - focus on Dovecot's own log files for mail delivery issues. If you're seeing this frequently, consider adjusting Ofelia's log level in Mailcow's configuration to suppress these informational messages.

AI note: These NOTICE-level logs from Mailcow's Ofelia scheduler are normal—SOGo's `sogo_ealarms` job runs every 15 minutes to process calendar/event reminders. The "Nms" placeholder in the summary is just a logging quirk, not an error; the actual runtime (128ms) confirms the job completed successfully. Next step: check SOGo's own logs (`docker logs mailcow-sogo-mailcow-1`) for any *actual* alarm delivery failures or user-reported missed notifications. If none exist, suppress this log pattern in Gremlin's filter rules.