[ SYS_TOOLKIT // #03 ]

INTERACTIVE SYSTEMS ENGINEERING TOOLS

CLIENT_SIDE // ZERO_TELEMETRY

Field-tested calculation engines for Linux kernel namespaces, CVSS vector evaluation, and enterprise ZFS storage architectures. All computations execute locally in your browser sandbox without network requests.

TOOL_01 // KERNEL_USER_NS_TRANSLATOR RFC / Linux 3.8+ user_namespaces(7)

Map rootless container (Podman / Rootless Docker) and NFSv4 squash UIDs to host kernel VFS permissions. Resolve permissions anomalies before deployment.

/etc/subuid START_UID Allocated subuid start

SUBUID_COUNT (RANGE) Allocated range count

CONTAINER_TARGET_UID UID inside container (0=root, 1000=app)

NFSv4 MOUNT EXPORT MODE Storage Kerberos / RPC idmap

[ KERNEL VFS RESOLUTION MATRIX ]

INSIDE CONTAINER UID 0 (root) Namespace View

➔ [ kernel uid_map ] ➔

HOST KERNEL VFS UID 100000 Physical Inode Owner

➔ [ storage transport ] ➔

STORAGE / NFS RESULT UID 100000 Direct Disk Allocation

GENERATED RUN COMMAND & /etc/subuid SPEC:

podman run --user 0 --uidmap 0:100000:65536 -v /data/storage:/storage:Z alpine

TOOL_02 // FIRST.ORG CVSS_v3.1_SCORING_ENGINE Common Vulnerability Scoring System

Interactive Common Vulnerability Scoring System (v3.1) calculator. Real-time mathematical calculation of Base Score, Exploitability, and Impact metrics matching NIST NVD standards.

EXPLOITABILITY METRICS

Attack Vector (AV):

Attack Complexity (AC):

Privileges Required (PR):

User Interaction (UI):

Scope (S):

IMPACT METRICS (CIA TRIAD)

Confidentiality (C):

Integrity (I):

Availability (A):

BASE SCORE

9.8

CRITICAL

Exploitability Subscore: 3.9

Impact Subscore: 5.9

Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

TOOL_03 // OPENZFS_CAPACITY_AND_VDEV_OPTIMIZER RAIDZ Parity, Ashift & Recordsize Engine

Determine actual net usable storage capacity, RAIDZ parity losses, and allocation padding penalties for OpenZFS pools (TrueNAS SCALE / Proxmox VE).

DRIVE_COUNT Total disks in VDEV

DRIVE_CAPACITY (TB) Manufacturer disk size in TB

TOPOLOGY / RAID_LEVEL Parity redundancy level

TARGET_WORKLOAD_PROFILE Recommended recordsize

[ ZFS STORAGE POOL METRICS & ALLOCATION ]

RAW CAPACITY 144.0 TB Total drive physical bytes

NET USABLE STORAGE 96.8 TiB Parity & slop-space deducted

PARITY OVERHEAD 25.0% Redundancy protection

RECOMMENDED ASHIFT ashift=12 4096-byte Advanced Format

OPTIMAL POOL CREATION & DATASET TUNING COMMANDS:

zpool create -o ashift=12 -O compression=zstd -O atime=off tank raidz2 sda sdb sdc sdd sde sdf sdg sdh
zfs set recordsize=128k tank/dataset

TOOL_04 // OPEN_POLICY_AGENT_CONTAINER_AUTHZ_ENGINE Rego Rule Evaluation & CVE-2024-41110 Triage

Simulate Open Policy Agent (OPA) Docker authorization rules client-side. Test whether Docker Engine requests are permitted or blocked, and inspect whether Content-Length manipulation triggers silent fail-open bypass anomalies (CVE-2024-41110).

REGO POLICY DEFINITION Active authorization policy rules

MOCK DOCKER API REQUEST (JSON) Simulated Docker daemon payload

[ OPA DECISION & AUDIT LOG ]