topic Re: Pattern regex less then 7 bytes in Custom Signatures

Pattern regex less then 7 bytes

Noam.Rotter — Sun, 21 Feb 2021 15:43:10 GMT

Hi all,

I have been asked to create a new Application signature to block any access to /abc/*

But when adding the pattern /abc/* in context http-req-uri-path

I get an error: "pattern must be at least 7 bytes [/abc/*]"

How can I block any access to /abc/* ?

Regards,

Noam.

Re: Pattern regex less then 7 bytes

hisingh — Mon, 22 Feb 2021 05:53:17 GMT

Hello

In 8.1, 9.x series; the Pattern will not be accepted if it is less than 7. We need some more data like any other common characters in the string to match.

Here is the document that explained how the customer signatures are created: https://knowledgebase.paloaltonetworks.com/servlet/fileField?entityId=ka10g000000U0ruAAC&field=Attachment_1__Body__s

Best

Himani

Re: Pattern regex less then 7 bytes

Noam.Rotter — Mon, 22 Feb 2021 10:52:44 GMT

Hi @hisingh

Thank you for the answer and referring me to the PDF - it's helpful.

Well,

The dir I need to block is /mng/ like

https://www.mysite.com/mng/login

As you can see, the uri /mng/ is less than 7 bytes...

Re: Pattern regex less then 7 bytes

hisingh — Mon, 22 Feb 2021 13:07:52 GMT

Hello

How about using the URL custom blocklist? You can create a custom URL list with URL "https://www.mysite.com/mng/login" and set up as blocked.

Best

Himani

Re: Pattern regex less then 7 bytes

Noam.Rotter — Mon, 22 Feb 2021 17:15:10 GMT

Hi,

Thank you for your idea, it answers the requirement.

Regards,

Noam.