Block domain *.*covid*.*

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Block domain *.*covid*.*

L1 Bithead

Hi Team

can we blocked domain in palo alto if domain name contains is *.*covid*.* in palo alto.


I was also wondering whether blocking such domain will be better through dns sinkhole or URL filtering.


Cyber Elite
Cyber Elite

in URL filtering the url is broken up into tokens separated by dots (ie token.token.token)

in a token you can either add a string or a wildcard, but not both


but you can create custom vulnerabilities where you have full reign over the wildcards and regex you use to identify patterns

Tom Piens
PANgurus - SASE and Strata specialist; (co)managed services, VAR and consultancy

Community Team Member

Hi @shubhamG ,


You can't use consecutive asterisks.  Consecutive asterisks in a URL wildcard pattern can severely impact performance and is not supported. Instead, use a single asterisk or multiple carets (^) to indicate consecutive tokens.

Check the following article on how you can use asterisk or caret wildcards :


You might want to look into creating a custom application with a pattern match (you can use regular expressions to do a pattern match):


Cheers !


LIVEcommunity team member, CISSP
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