Forum Discussion

redheadontherun's avatar
redheadontherun
Icon for Nimbostratus rankNimbostratus
Jul 27, 2016

Block Source IP using a blocklist hosted on a webserver

Currently we utilize a web server to host a blocklist that some of our other security devices use to block IP addresses. It allows us to maintain 1 list for all devices. Can the F5 ASM or LTM utilize...
ASM Advanced WAF
BIG-IP
ifiles
iRules
LTM
security
Yann_Desmarest_'s avatar
Yann_Desmarest_
Icon for Nacreous rankNacreous

Hi,

 

this list can be uploaded as an ifile. You can also do a lookup using sideband connections in irules

 

Yann_Desmarest_'s avatar
Yann_Desmarest_
Icon for Nacreous rankNacreous
Jul 27, 2016

Here a small Proof of Concept.

when HTTP_REQUEST {
    set file [ifile get domains]
    log local0. "$file"
    set domain "amazon.co.uk.security-check.ga"
    if { [string match "*$domain*" $file] } {
        log local0. "succeeded"
        HTTP::respond 200 content "ok"
    } else {
        log local0. "failed"
    }
}

Note : should test performance impact, memory consumption and stuff like that before switching something in production