PaloAlto EDL Hosting Service

If you want to configure rules for Saas services on the PaloAlto Firewall, you can do this using the App ID for the particular service, or you can use the IP addresses, Domains or URLs of the service in the policy.

However, since Saas services typically do not use only one IP address, domain or URL, and since these can change dynamically, it requires a dynamic list that is constantly updated automatically.

PaloAlto offers this service as «EDL hosting service». External Dynamic Lists (EDL) are dynamic lists that can contain a list of IP addresses, domains or URLs. These lists are periodically queried by the firewall and updated accordingly. These EDL lists can then be used in various policies. Due to the automatic update of the lists, they are always up to date. There is also no need to commit the configuration if the list changes.

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Palo Alto Firewall Feature: Block Tor Exit nodes with an External Dynamic List (EDL)

With the possibility to include external lists from third parties via the feature «External Dynamic List EDL», this opens up many possibilities to restrict your own security policies even better and to prevent access to the TOR network.

In the following tutorial I will show you how to configure the list of TOR exit nodes, which can be found at https://check.torproject.org/torbulkexitlist as a list of IP addresses.

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