Forum Discussion
terri8502
Nimbostratus
NimbostratusRequesting Assist with iRule Please
Hi All, I have F5LTM version 16.1.2. I need to make an irule to stop NetSparker from scanning our web servers. I can identify them with the x_scanner variable in the header. I followed K31914583 w...
Hi there,
The K31914583 article assumes that you have created a data group. In your example above that data group would be called Netsparker. Also is the header name x-scanner or x_scanner?
Seeing as you are only after one value I would not use the data group.
You can use an irule to do this for you such as below,
when HTTP_REQUEST { if { string tolower [HTTP::header "X-Scanner"]] contains "netsparker"] } { drop } }or you may want to look at using a traffic policy to do this for you, something like this. You can also include additional actions such as logging to the policy.
Don't forget to apply the irule and/or policy to your VS, make sure you test this before applying to production traffic.
Good luck
Mark
Mark_van_D
Cirrostratus
CirrostratusHi there,
The K31914583 article assumes that you have created a data group. In your example above that data group would be called Netsparker. Also is the header name x-scanner or x_scanner?
Seeing as you are only after one value I would not use the data group.
You can use an irule to do this for you such as below,
when HTTP_REQUEST {
if { string tolower [HTTP::header "X-Scanner"]] contains "netsparker"] } {
drop
}
}or you may want to look at using a traffic policy to do this for you, something like this. You can also include additional actions such as logging to the policy.
Don't forget to apply the irule and/or policy to your VS, make sure you test this before applying to production traffic.
Good luck
Mark
CA_Valli
MVP
MVPHello, this is good info -- be careful with iRule syntax, your IF statement has wrong number of brackets.
Correct syntax below.
when HTTP_REQUEST {
if { [string tolower [HTTP::header "X-Scanner"]] contains "netsparker" } { drop }
}
terri8502Thank you too! I appreciate your time and review.