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Last updated September 4th, 2023 by Avigdor Book

Firewall migration can seem like a daunting task. However, a well-planned firewall migration checklist can simplify the process and ensure all necessary steps are taken. This blog post will guide you through the migration process from start to finish, considering key points like the migration plan, firewall configuration, maintenance windows, and post-migration tasks.

Firewall Migration: Steps and Best Practices

Step 1: Create a Firewall Migration Plan

A well-laid-out firewall migration plan is your roadmap to success. It entails identifying your current firewall’s specifications, including the firewall rules, security policy, and configurations. Moreover, you need to consider the functionality and requirements of the new firewall. This stage also involves determining the migration window to minimize impact on critical services.

Step 2: Review Current Firewall Configuration

To facilitate a successful migration, it’s essential to review and understand the configuration of your old firewall, including firewall policies, NAT rules, VPN settings, and IP addresses. This helps ensure that the same policies are carried over to the new firewall, hence maintaining your network’s security and connectivity.

Step 3: Prepare the New Firewall

Prepare the new firewall by configuring its initial settings and rules. You might want to use a firewall migration tool, which can convert the configuration file of the old firewall into a template for the new one. This reduces the risk of configuration errors and speeds up the process.

Step 4: Testing and Validation

Test the new firewall to confirm that all settings, policies, and rules work as expected. Ideally, this should be done in a controlled environment before the cutover to prevent any connection issues.

Step 5: Firewall Cutover and Rollback Plan

Now that everything is set, plan for the cutover. Ensure that you have a contingency plan, also known as a rollback plan, if something goes wrong. High availability of your network should be maintained during this critical phase.

Step 6: Post-Migration Tasks

After a successful migration, review the migration process to identify any areas for improvement. It’s crucial to regularly audit your new firewall to ensure that it continues to protect your network effectively.

Remember, every migration project is unique, and you may need to adjust these steps to suit your specific requirements. For more in-depth guidance, check out our security policy migration tips and our insights on data center migration.

The Role of Tufin in Your Firewall Migration Journey

At Tufin, we’re all about empowering businesses to manage their network security efficiently and effectively. 

Tufin streamlines the firewall migration process, from automated decommissioning of old firewalls to automated cloning of existing security policies to populate new firewalls,  across a multi-vendor, hybrid network.

Additionally, we provide resources for firewall optimization, firewall management, and firewall auditing that can significantly ease the process of migrating from an old firewall to a new one.


Q: What is a firewall migration checklist?

A: A firewall migration checklist is a guide outlining all the steps and considerations when migrating from one firewall to another. This includes planning, reviewing current configurations, setting up the new firewall, testing, cutover, and post-migration tasks.

For more on this topic, take a look at our post on the firewall rule lifecycle.

Q: How do I plan a firewall migration?

A: Planning a firewall migration starts with understanding the capabilities and limitations of your current firewall and the new one you’re transitioning to. The plan should also include a clear migration timeline, a review of firewall rules and configurations, and contingency measures.

Get more in-depth insights by reading our blog on security policy migration tips 

Q: What are common tasks in a firewall migration plan?

A: Some common tasks in a firewall migration plan include creating a detailed migration plan, reviewing and documenting current firewall configuration, setting up the new firewall, testing its functionality, implementing a cutover plan, and auditing the firewall post-migration.

Read more about successful migration strategies in our data center migration blog post.

Wrapping Up

To get a deeper understanding of how Tufin can assist you in your firewall migration journey, consider signing up for a demo today!

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