imaxe.cloud
SECURITY AUDIT
Ref. LYN-memcached-2.0-20260815-EN
Generated 2026-08-15 17:14 UTC
Lynis security audit

System hardening report

Automated security audit of the image, run with Lynis on a freshly provisioned instance before publishing.

Host
ip-172-31-84-101
Operating system
Ubuntu 26.04 LTS
Kernel
7.0.0-1010-aws
Architecture
arm64
Lynis version
3.1.7
Profile
custom.prf
Duration
56s
Run by
root
Our hardening commitment

Every image imaxe.cloud publishes is hardened by default, for the security of whoever runs it. We do not hand over a bare distribution: the system ships with a default-deny firewall, SSH restricted, kernel and mount options tightened, unattended security updates, and file integrity, rootkit, malware and audit tooling installed and running.

This report is the evidence. It is generated automatically on a freshly built instance before the image is published, it is never edited by hand, and it is published in full — including everything the audit did not score. Hardening is part of the product, so the audit that measures it travels with it.

100
/ 100
Hardening index
0
Warnings
Issues that should be addressed
0
Suggestions
Improvements worth considering
241
Tests performed
Lynis security checks executed
0
Plugins enabled
Additional audit plugins
Verdict

The system reaches a hardening index of 100/100: a strongly hardened configuration ready for production use.

1Score by category

Breakdown of the audit results by security area, derived from the warnings and suggestions found in each one.

Kernel & boot100
Authentication100
Filesystem & integrity100
Network & firewall100
SSH100
Packages & tools100
Logging & time100
Hardening & malware100

2Warnings

Findings that Lynis flags as warnings. They are reviewed and remediated before each release.

Test IDDescriptionSeverity
No warnings — the audit found no issues at this level.

3Suggestions

Recommendations reported by Lynis. Some do not apply to cloud images or are deliberate design decisions.

Test IDRecommendationCategory
No suggestions.

4Checks deliberately skipped

The image runs Lynis with a profile that skips 23 checks. None of them is a hardening gap: they are checks that cannot be evaluated on a cloud image, that are already covered by another control, or that depend on data which only exists once the instance is running. Each one is listed with its reason so the omission can be audited.

Test IDReason why it does not apply
AUTH-9284The accounts it flags are the service accounts of the Ubuntu base (daemon, bin, sys…). They ship without a valid password and without an interactive shell, which is exactly what is wanted; the check reads that normal state as a finding.
BOOT-5122There is no GRUB password because there is no physical console to type it on: an EC2 instance boots unattended and its console is an API call protected by IAM. The password would only be an obstacle for rescue work.
BOOT-5180False positive on this image: the check cannot be evaluated here and its result would not reflect the real state of the system.
BOOT-5264False positive on this image: the check cannot be evaluated here and its result would not reflect the real state of the system.
CRYP-7902Depends on data that does not exist while the image is being built; it is resolved on first boot.
DEB-0810apt-listbugs is interactive: it pauses an upgrade to ask a human. On an unattended image it would block the automatic security updates, which matter far more.
FILE-6310The image ships a single root volume, which is how a cloud instance is resized and snapshotted. What this check really wants — /tmp, /dev/shm and /run unable to execute binaries or hold devices — is achieved here with hardened mount options.
FILE-7524Permissions are set to what this product needs and are verified on every build by our own test suite; the generic check flags legitimate application files as if they were mistakes.
FIRE-4512The check counts iptables rules and calls a short list "empty". Here the first filtering layer is the AWS Security Group, outside the instance, and ufw closes everything else by default — the protection exists, it just is not written where this check looks.
FIRE-4513The check marks as unused any rule whose packet counter is zero. On a freshly booted instance every counter is zero because no traffic has arrived yet. Lynis itself warns about this: rules that are not triggered may still be in use.
HRDN-7220Compilers are needed on the image for DKMS and kernel modules, so they cannot be removed. Instead they are restricted to root with 0750 permissions — which is what the companion check HRDN-7222 verifies, and it passes.
HTTP-6710Depends on data that does not exist while the image is being built; it is resolved on first boot.
KRNL-6000The check compares sysctl values against a fixed list that assumes bare metal. This image sets its own hardened values and the AWS kernel constrains others; the differences it reports are our decisions, not oversights.
LOGG-2154No external log server is baked in because the log destination is the buyer's choice, not ours. Logs are complete and local, ready to be shipped wherever they want.
LOGG-2190Rotation is left as the distribution ships it and reviewed service by service; the check expects one specific layout that does not fit an image meant to be reconfigured after purchase.
MALW-3280This check only scores commercial antivirus products. The image ships ClamAV, with signatures updated automatically, and that is scored by its own check — we are not going to bundle paid third-party software just to earn a point.
NAME-4028The DNS domain is not baked in because the instance gets it by DHCP from the buyer's VPC. Whatever we wrote here would be overwritten at first boot.
NAME-4404Depends on data that does not exist while the image is being built; it is resolved on first boot.
SSH-7408SSH stays on port 22 because that is what EC2 Instance Connect and the console tooling expect. Moving the port hides nothing from a scanner; brute force is handled by key-only authentication and fail2ban.
SSH-7440SSH does not pin an explicit list of allowed users: the buyer creates their own accounts on top of this image, and our list would lock them out. Access is already restricted by key-only authentication, no root login and fail2ban.
TOOL-5002No configuration-management agent is installed on purpose: the image is built with Ansible over SSH, which leaves nothing running afterwards. One less daemon is one less attack surface.
USB-1000Does not apply to the model of a cloud instance: what it checks either does not exist here or is handled by the provider's infrastructure.
USB-3000Does not apply to the model of a cloud instance: what it checks either does not exist here or is handled by the provider's infrastructure.

This list is read from the Lynis profile baked into the image itself, not from a document kept by hand: what you see here is exactly what the audit applied.