Sold by: Lynxroute
Deployed on AWS
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This is a repackaged open source software product wherein additional charges apply for hardening, security configuration, and setup support.
Nagios Core is a host, service and network monitoring server built as compiled C daemons with an Apache CGI web interface, holding all check state in flat files rather than a database. This Lynxroute build is hardened and ready out of the box: the web password is generated at first boot and stored as a bcrypt hash, the web interface is bound to loopback behind an nginx TLS perimeter, vendor update checks are switched off so the instance never phones home, UFW firewall pre-configured, and a CIS Level 1 hardened Ubuntu 24.04 LTS base.
GPL-2.0 license - fully auditable, no vendor lock-in.
Overview
This is a repackaged open source software product wherein additional charges apply for hardening, security configuration, and setup support.
WHAT IS NAGIOS CORE
Nagios Core is one of the longest-established open source monitoring servers for hosts, services and network devices. It is a set of compiled C daemons with an Apache CGI and PHP web interface, and it deliberately keeps no SQL database: current state, retention and the event log live in flat files, which is what makes it light enough to watch hundreds of hosts from a small instance. Monitoring is done by check plugins, small executables that return a status and a line of output, so anything you can write a script for can be monitored. This image ships Nagios Core 4.5.14 with Nagios Plugins 2.5, covering ping, disk, load, users, processes, SSH, HTTP, SMTP, SNMP, DNS, NTP and many more. Scheduling, state flapping detection, dependencies, escalations, notification commands and an external command pipe are all part of the core. GPL-2.0 license, no vendor lock-in.
WHAT THIS AMI ADDS
Security hardening:
- Web password generated at first boot, unique per instance, stored only as a bcrypt hash - the AMI itself ships a locked account with no usable credential
- Web interface served by Apache bound to 127.0.0.1 only, with nginx terminating TLS on 443 in front of it
- Self-signed certificate out of the box and Certbot pre-installed, so a CA-signed certificate is one command away
- Vendor update checks disabled - the instance does not report its version to any third party
- The monitoring daemon runs unprivileged with a restricted umask, and the compiler toolchain is removed from the shipped image
- UFW firewall pre-configured - SSH 22 and HTTPS 443; port 80 only redirects to HTTPS and carries the certificate-issuance challenge
- fail2ban, AppArmor
- CVE scan - every image is scanned for vulnerabilities before release
OS hardening (CIS Level 1):
- CIS Ubuntu 24.04 LTS Level 1 benchmark applied via ansible-lockdown
- auditd, SSH hardening, Kernel hardening, IMDSv2 enforced
Compliance artifacts:
- SBOM - CycloneDX 1.6 at /etc/lynxroute/sbom.json
- CIS Conformance Report at /etc/lynxroute/cis-report.html
- CIS Tailored Profile at /usr/share/doc/lynxroute/CIS_TAILORED_PROFILE.md
Highlights
- Monitoring server security baked in: web password generated at first boot and stored as a bcrypt hash, no usable credential in the image itself, web interface bound to loopback behind an nginx TLS perimeter, vendor update checks disabled so the instance never phones home, UFW firewall pre-configured.
Details
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Delivery method
Delivery option
64-bit (x86) Amazon Machine Image (AMI)
Latest version
Operating system
Ubuntu 24.04
Deployed on AWS
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Pricing
Free trial
Try this product free for 5 days according to the free trial terms set by the vendor. Usage-based pricing is in effect for usage beyond the free trial terms. Your free trial gets automatically converted to a paid subscription when the trial ends, but may be canceled any time before that.
Pricing is based on actual usage, with charges varying according to how much you consume. Subscriptions have no end date and may be canceled any time.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
Dimension | Cost/hour |
|---|---|
t3.medium Recommended | $0.05 |
t3.large | $0.05 |
t3.small | $0.03 |
m6i.xlarge | $0.05 |
m6i.large | $0.05 |
Dimensions summary
You pay by the hour based on the EC2 instance size you launch. The five options map to different compute capacities. The t3.small, t3.medium, and t3.large run on burstable instances, scaling up in size and hourly rate. The m6i.large and m6i.xlarge run on general-purpose instances for steadier workloads. You pick the instance that fits your monitoring load; the hourly software rate rises with the size you choose. Billing runs through AWS by the hour, with no upfront commitment. Every instance ships with the same hardened, pre-configured Ubuntu base regardless of size.
Top-of-mind questions for buyers
The t3.small, t3.medium, and t3.large run on burstable instances. They handle variable loads that spike then settle. The m6i.large and m6i.xlarge run on general-purpose instances built for steady, continuous monitoring. Pick t3 for intermittent demand and m6i for sustained workloads.
The software rate meters running instance-hours. A fully stopped instance stops accruing the hourly software charge. You may still pay underlying AWS storage fees for stored volumes while stopped. Only running time counts toward the software rate you selected.
Every instance ships on a CIS Level 1 hardened Ubuntu 24.04 base. It includes a CVE scan, a bundled software bill of materials, a conformance report, firewall, and unique credentials generated at first boot. These artifacts stay inside your own deployed instance.
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Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Nagios Core v4.5.14
- Re-release of Nagios Core 4.5.14. The application version is unchanged; this build refreshes the underlying operating system image
- Rebuilt on the latest CIS Level 1 hardened Ubuntu 24.04 LTS base, picking up every operating-system security update published since the previous build
Additional details
Usage instructions
- Launch instance (t3.small minimum, t3.medium recommended)
- Open Security Group - allow TCP 443 from your IP (and TCP 80 if you will use certbot)
- SSH: ssh -i key.pem ubuntu@<PUBLIC_IP>
- Read credentials: sudo cat /root/nagios-credentials.txt
- Open https://<PUBLIC_IP>/ in your browser - accept the self-signed certificate warning, then sign in as nagiosadmin with the password from step 4. The browser asks for it with a standard HTTP authentication prompt.
- The local host is already monitored (load, disk, users, processes, SSH and the web server). Add your own hosts and services by creating a file under /usr/local/nagios/etc/objects/ and referencing it from /usr/local/nagios/etc/nagios.cfg with a cfg_file= line.
- Check the configuration, then reload: sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg sudo systemctl reload nagios
The web password is generated on your instance at first launch and is stored only as a bcrypt hash. Credentials are saved to /root/nagios-credentials.txt. Check plugins are installed in /usr/local/nagios/libexec - run any of them with --help to see its options. Check state is held in flat files under /usr/local/nagios/var and survives a reboot; there is no database to administer. No mail transport is installed - install one (for example msmtp-mta) and point it at your relay before enabling email notifications. Replace the self-signed TLS certificate with a CA-signed certificate for production use. Certbot validates over HTTP, so TCP 80 must be reachable from the internet while the command runs: sudo certbot --nginx -d yourdomain.com
Resources
Vendor resources
Support
Vendor support
Visit us online: https://lynxroute.com
For Nagios Core documentation:
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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