First-time evaluator: What are the concrete steps to test a rollback/disaster recovery?

As a newcomer to both this community and the broader field of network security tooling, I find myself tasked with evaluating Twingate for a potential organizational deployment. My background is primarily in data visualization and business intelligence, where the concepts of rollback and recovery are often tied to dashboard versions or data pipeline snapshots. Applying this mindset to a zero-trust network access solution presents a unique challenge.

My primary question revolves around practical validation. I understand the theoretical need for a rollback plan—should the Twingate deployment introduce instability or fail to meet our requirements—but I am seeking a concrete, step-by-step methodology to test this recovery process *before* full commitment. The documentation often speaks in generalities, and I wish to move from abstract principles to a verifiable procedure.

Could the community share a detailed workflow for testing a full rollback to a pre-Twingate state? Specifically, I am interested in:

* **Pre-implementation Baseline Documentation:** What specific system states and network configurations must be meticulously recorded? I assume this extends beyond simple connector IPs to include:
* Exact firewall rules (source, destination, port, protocol) governing access to the resources Twingate will protect.
* The state of any previous VPN solutions (client configurations, server settings).
* DNS configurations, both internal and external, that might be altered.
* Authentication provider settings (e.g., SCIM provisioning, identity provider redirect URIs).

* **The Rollback Test Procedure:** Is it advisable to conduct a simulated rollback in a isolated environment? If so, what does that entail? More critically, for a live but limited pilot deployment, what is the sequential order of operations for a controlled dismantling? For instance:
1. Removing Twingate Connectors from the resource hosts.
2. Revoking or disabling all Twingate API tokens and service accounts.
3. Reverting DNS changes to their recorded baseline.
4. Re-instating the documented firewall rules to replace Twingate's access controls.
5. Uninstalling Twingate client software from pilot user devices.
6. Verifying that the old access methods (e.g., VPN) function identically to their pre-Twingate state.

* **Validation Metrics:** How do you quantitatively and qualitatively confirm that the rollback was successful and complete? Beyond "it works," what checks ensure no residual Twingate dependencies or configurations remain that could cause issues later? Are there common pitfalls or overlooked artifacts that could leave the network in a degraded or insecure state post-rollback?

My concern is ensuring that the evaluation is conducted with the same rigor I would apply to testing a new BI platform migration, where the ability to revert to a known-good state is a fundamental part of the risk assessment. Any insights from your practical experiences would be greatly appreciated.