External Dynamic Lists - Curation & Hosting Service
External Dynamic Lists or EDL's are used by firewalls and some SAAS solutions to deploy dynamic content in a control or security policy.
Some are also used to provide a filter list for DNS servers or other filtering.
These are usually IP address Lists, URL's and Domain names, but some firewalls support other options as well.
They typically contain information that the firewall cannot generate itself, this usually requires individual processing and formatting for self hosting and are also often used where firewall DNS lookups are too slow or where large static user defined lists are problematic because they require frequent or near continuous updating, which takes time and resources and ongoing maintenance.
EDLs can be used to facilitate granular rule based controls for cloud or other services, increasingly common in SAAS and ZTNA environments, to allow list critical SAAS applications, or to block certain user activities.
We optimise the IP address / domain / URL information received from SaaS application providers and other sources in order to reduce the number of IP addresses that are published in each EDL and to make the URL and Domain wildcarding work for specific firewall vendors, who mostly have differing support for wildcards.
This optimisation includes removing duplicate IP addresses, aggregating the remaining IP addresses into a smaller number of contiguous address ranges as CIDRs or IP address ranges dependant of firewall support for the features.
Our EDL API has a number of HTTP parameters you may and should customise in the request configuration on the firewall to further optimise EDLs and to choose the best firewall match for you environment.
In some cases the API takes multiple parameters, for example to aggregate a users chosen list of ASN's into one EDL and some take advantage or IP ranges to reduce list size for some firewalls.
This is a free service.
We also maintain a list third party EDL providers, both free and commercial. If you feel you should be on this list, please get in touch with the details and we'll add you.