IPCheckr

IPCheckr is a system for learning and testing subnetting. Students practice and get quick results, teachers manage classes, and sign-in can use your AD/LDAP. With GNS3 support, each user can launch their own lab safely.

What it does

• Subnetting drills and automated grading for students.
• Multi-user classroom flows for teachers (assignments, submissions).
• Admin workflows for managing org structure and users.
• AD/LDAP authentication with role mapping.
• Multi-user GNS3 integration (per-user server sessions with AD-backed access control).

Screenshots

Teacher

Student

Admin

Authentication

• Local: seeded admin admin / admin on first run (change immediately).
• AD/LDAP: configurable host/port/SSL, bind or DN template, search base, username attribute, and group DNs for teacher/student role mapping. Switch auth mode in Admin -> Settings.

GNS3 integration (multi-user)

• Per-user GNS3 server sessions orchestrated by the backend; port/PID tracking stored in DB.
• AD-authenticated users get their own GNS3 instance; files remain per-user under service ownership.

Quickstart (installer script)

Run the installer:

curl -fsSL https://raw.githubusercontent.com/tapinko/ipcheckr/master/Deploy/install.sh -o install.sh && sudo bash install.sh

The wizard installs prerequisites, collects your ports and secrets, sets up GNS3 (if you choose it), and starts the stack. Default login: admin / admin.

GNS3 version selection

• Installer will ask whether to install GNS3; if yes, you must pick an install method:
  • PyPI: lets you pin gns3-server (default 2.2.52); if your repo is missing a specific build, choose this.
  • Repo: uses distro packages and forces version to latest.

Tested distributions

• Ubuntu 25.04

License

MIT — see LICENSE.