Forum Discussion
Mike_Graston_10
Nimbostratus
Nimbostratus401 response with message and logging
I have a scenerio where I am not sure on how to do this. I would like to filter a uri that contains the string /abc. Any ip address that hits it I would like to log and send back a 401 Unauthorized page to the user and a message that their IP address has been logged as "client IP". Also i would need to know where the log messages go, as you might have figured I haven't worked with logging at all. I don't want to log every IP just the ones that hit this rule, and I don't know if I need to add an elseif statement to continue sending others who don't meet this criteria to the pool or web servers?
when HTTP_REQUEST {
if { [string tolower [HTTP::uri]] contains "/abc"} {
HTTP::respond 401
}
}
4 Replies
- JRahm
Admin
log local0. "Client IP is [IP::client_addr]"
This will go to /var/log/ltm
If the condition isn't met (ie, the default behavior) then traffic will follow your virtual / pool configuration.
HTH...Jason 
Mike_Graston_10So let me get this right, The log will only populate if the condition is met as containing /abc.
when HTTP_REQUEST {
if { [string tolower [HTTP::uri]] contains "/abc"} {
log local0. "Client IP is [IP::client_addr]"
HTTP::respond 401
TCP::close
}
}
Can I add to the 401 page so that the client sees the message - Your IP address "[IP::client_addr]" has been logged?
Also if the condition is met I would like to terminate the session?
Also you said it would go to the virtual server then to be processed normally?- JRahmYes you can sho the client that you are logging his IP in the response, check out this thread for specifics->
Connections not meeting the conditional ( contains /abc) with be processed *normally*, so no logging will occur, and no 401 response initiated by BigIP will be sent. - Mike_Graston_10OK, not quite there yet,
1. no loging is happening to the /var/log/ltm file?
2. I need to attempt to login, i tried a coule different reponse codes? looks ugly!
when HTTP_REQUEST {
if { [string tolower [HTTP::uri]] contains "/abc"} {
log local0. "Client IP is [IP::client_addr]"
HTTP::respond 401 content "Apology PageThis
is an unauthorized destination from your current location.Your IP address has been logged>"
}
}
