Marianne Martinez
Migrating from Cisco ASA to Palo Alto Networks (PAN) Firewalls can be a complex process, requiring careful planning and execution. While there is no official tool for this migration, various methods and tools, such as the PAN Migration Tool (PAN-MT) and Expedition, can be used. The migration process may involve extracting and translating configurations, addressing inbound and outbound rules, and managing device-specific configurations. Additionally, preparation, including cleaning up legacy configurations and organizing objects, can streamline the migration. A large configuration file may also require specific sleep settings to prevent system inactivity during migration.
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What You'll Learn
- There is no official tool to migrate from PAN to ASA
- You can replicate the configuration from PAN to ASA manually
- For large installations, use the PAN and ASA REST API to build a script
- Use the Secure Firewall migration tool to migrate from PAN to Threat Defense
- The PAN Migration Tool (PAN-MT) translates the Cisco ASA nameif value into the related zone name
There is no official tool to migrate from PAN to ASA
Cisco does not offer an official tool to migrate configurations from PAN to ASA. However, there are unofficial tools available, such as the PAN Migration Tool (PAN-MT), which can be used for migration from ASA to PAN.
If you are migrating manually, you can replicate the configuration from PAN to ASA. If your installation is large, with more than 500 access control list (ACL) rules and 500 objects, you can use the PAN and ASA REST API to build a script to get objects from PAN and create them in ASA. Migrating a large number of objects manually can lead to mistakes.
If you are using the Secure Firewall Migration Tool, you can perform a demo migration to visualize how the actual migration flow will look. You can also download and verify the pre-migration report, map interfaces, map security zones, and map interface groups. The Secure Firewall Migration Tool saves a copy of the Pre-Migration Report, Post-Migration Report, PAN configurations, and logs in the Resources folder.
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You can replicate the configuration from PAN to ASA manually
There is no official tool to migrate PAN configuration to ASA. If your installation is large, with >500 access control list rules and >500 objects, you may want to use the PAN and ASA REST API to build a script to get objects from PAN and create them in ASA. This will help to avoid mistakes that may inevitably occur when migrating a large number of objects manually.
However, if you are migrating manually, you can replicate the configuration from PAN to ASA. First, you will need to obtain the IP address for the management center for On-Prem Firewall Management Center. Then, you can export the configuration file. You can do this by logging in to the Palo Alto Firewall web UI using a super-user account. You will then need to export the panconfig.xml for the Palo Alto Gateway firewall and route.txt (if you have the NAT rules with the same source zone and destination zone).
If you are using the cloud version of the migration tool hosted on Security Cloud Control, skip the above steps. Instead, you will need to provide the region and API token. If you want to migrate device-specific configurations like interfaces and routes, add the target threat defense to the management center.
If you are planning to migrate a large configuration file, configure sleep settings so the system doesn't go to sleep during a migration push. You can also download and verify the pre-migration report, map interfaces, map security zones, map interface groups, and perform all other actions like you would in an actual migration workflow.
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For large installations, use the PAN and ASA REST API to build a script
Cisco does not offer an official tool to migrate PAN configuration to ASA. For large installations, with more than 500 access control lists (ACL) rules and 500 objects, it is recommended to use the PAN and ASA REST API to build a script. This will allow you to get objects from PAN and create them in ASA, avoiding the pitfalls of manual migration, which can be time-consuming and error-prone.
The first step is to install the REST API on your ASA-V. This requires running a set of commands, including logging in to your Cisco ASAv, enabling configuration, copying the TFTP server address, and enabling the HTTP server. Once the REST API is installed, you can use it for various tasks, including password rotation.
The next step is to authenticate for "Authorization" to the REST API. You can use Postman, a widely used tool for building, testing, and supporting REST APIs, to create a collection of requests and test the responses. After authentication, you can start running your script using Perl script.pl username password.
It is important to note that large running configurations can cause issues in memory-intensive situations, such as a high volume of concurrent requests. In such cases, workarounds include moving to higher-memory ASA platforms or reducing the size of the running configuration.
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Use the Secure Firewall migration tool to migrate from PAN to Threat Defense
The Secure Firewall migration tool can be used to migrate from PAN to Threat Defense. The tool automates the migration of supported PAN features and policies to Threat Defense. However, unsupported features and policies must be manually configured.
To get started with the migration, you will need to download the Secure Firewall migration tool. The tool has specific infrastructure and platform requirements, including running on a Microsoft Windows 10 64-bit operating system or macOS version 10.13 or higher.
Before initiating the migration, ensure that the target threat defense device meets the requirements. The threat defense device must have an equal or greater number of physical and port channel interfaces than those used by the PAN configuration. Additionally, the management center software version should be 6.1.x or later.
During the migration process, you can utilize features such as the demo mode, which allows you to visualize how the migration flow will look. You can also download and verify the pre-migration report, map interfaces, security zones, and interface groups.
After the migration, the Secure Firewall migration tool saves a copy of the pre-migration report, post-migration report, PAN configs, and logs in the Resources folder.
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The PAN Migration Tool (PAN-MT) translates the Cisco ASA nameif value into the related zone name
The PAN Migration Tool (PAN-MT) is a useful resource when migrating from Cisco ASA to PAN. The tool translates the Cisco ASA nameif value into the related zone name. This is an important step in the migration process, as it allows for a more consistent, named zone structure.
The PAN-MT also has a manual step, which allows the user to "translate" the ASA physical interface into a PAN physical interface. For example, interface GigabitEthernet0/0 can be translated into ethernet1/1. This manual step offers the user the ability to edit the nameif and interface values to their desired output.
The PAN-MT set style output is also used in steps 1, 2, and 3 of the migration process. It is much easier to work with than the XML. A dummy PAN NGFW configuration can be used as input to the merge stage of the PAN-MT. This is essentially a configuration snapshot from a PA-5060, configured with device and network settings.
However, there are some issues with the migration tool. For example, the tool does not properly migrate the NAT and corresponding security rules. This is a problem as, in ASA, the security policies use the post-NAT IPs, whereas in PAN, the pre-NAT IP should be used.
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Frequently asked questions
Migration from Cisco ASA to PAN can be done using the PAN Migration Tool (PAN-MT). This involves importing configurations from Panorama into the tool, merging them with the ASA configuration, and then uploading everything back. It is important to note that there is no official tool to migrate PAN configuration to ASA, so for larger installations, consider using the PAN and ASA REST API to build a script for migration.
To export the PAN configuration file, log in to the Palo Alto Firewall web UI using a super-user account.
The PAN Migration Tool translates the Cisco ASA nameif value into the related zone name. It also has a manual step to translate the ASA physical interface into a PAN physical interface. Editing the ASA configuration file before migration can help you get the desired values in the PAN-MT output.
Migrating firewall rules involves reading and filtering CSV data, extracting address information, and separating individual IPs and address groups. This process can be automated using scripts, but it may need to be tailored to specific needs and environments.
