Forum Discussion
Yozzer
Nimbostratus
NimbostratusASM blocked page redirect
When triggering an ASM signature we have a custom blocked page returned to the user who is then redirected to another page on the web server so that their session cookie is invalidated. Attacke...
I think via an iRule, you should be able to do this with the SIDEBAND command (https://clouddocs.f5.com/api/irules/SIDEBAND.html) - take the HTTP url that you currently have included in the redirect page, and should be able to use this in the iRule. (no personal experience with this one though).
Alternatively, are you familiar with ASM's Session Awareness functions? (Security ›› Application Security : Sessions and Logins : Session Tracking) You can enforce the session management on the ASM box, rather than on the backend webserver. Once enabled, you can also tell the F5 to block off particular sessions, IP's or usernames after X violations. Personally I prefer this option above session management on the backend server.
YozzerNimbostratus
NimbostratusHi, thanks for responding.
will see if that helps. The session will still remain on the web server unless the blocked request is forwarded with the session cookie to a page that invalidates sessions. Will investigate if ASM commands via an irule will help.
cheers