Size limit for URL block list

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Size limit for URL block list

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Is there a size limit for a URL block list, anad if so, what is it?  (I understand that there is a size limit on each URL...I am referring to the size of the entire list of URLs)


L4 Transporter


the limit for the entire url list is 1000 entries for the allow list and block list together......this is significantly increased in software version 3.1.x and greater.

Please keep in mind that if you use an "*" in the url entry, much more memory is used. Especially if the "*" is in the middle or rear of the url entry.

thank you,



quick question

I'm currently using PA-2050 Firmeware.4.0.6.

customer asked me about the max limit of URL block list.

would you please teach me where I can able to find the correct current max list on my box?

I used below command set to extract the some value

- show system state

from there, I found two values.

cfg.general.max-blacklist : 25000

cfg.general.max-whitelist : 25000

is that the right comment to answer my question?

would you please share your idea?

thank you very much.


Yes, those numbers are correct - the maximum number of entries (in your case 25,000) is for the entire device, and is shared across the allow list, block list, and custom categories. 

Hope this helps,


thank you very much!

have a nice day~

sorry to bump an old query but I'm having trouble adding URLs to both custom categories and block lists with filtering profiles

Adding via the GUI, I can't seem to add more than about 24 URLs to a block list or ~100 URLs to a custom category - no error message is displayed, when I click OK in either section, the dialogue box just stays on screen.  Am I doing something wrong? Do I need to use the CLI?

(this is with PAN-OS 4.1.2 on a 5060)



[edit - works via the CLI, but having added the URLs via the CLI if I then go to the GUI, click edit on the custom category and try to click ok *without* making any changes, it won't let me]

Hi Liam,

It sounds like you have a bug - could you file a case with Support so that we can properly address it?



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