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MaxMedov's avatar
MaxMedov
Icon for Cirrostratus rankCirrostratus
Apr 18, 2023

Block specific Client IP if request contains XYZ

Hi, I need help creating the fastest solution (LTM Policy / iRule / other) to do this:
If client IP = X.X.X.X
and request contains = XYZ
Drop the client / or block by WAF message

Thank you!

security

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  • Michael_Saleem's avatar
    Michael_Saleem
    Icon for MVP rankMVP
    Apr 18, 2023

     

    For a very quick solution to match on a single source IP and URI, you could use the following:

    when HTTP_REQUEST {
    if { ( ( [IP::addr [IP::client_addr] equals X.X.X.X] ) && ( [string tolower [HTTP::uri]] contains "xyz" ) ) } {
        drop
    }
}

    However, if you need need it to be more scalable, I would probably use a data group to hold multiple client IP addresses and then maybe another data group or switch -glob statement to match on multiple URIs.

    • CA_Valli's avatar
      CA_Valli
      Icon for MVP rankMVP
      Apr 18, 2023

      I'd just advise to avoid using "string tolower" on HTTP uri instruction, since path is case sensitive.