SIP: Server Response - Bad Request (400)
This signature detects attempts to exploit a known vulnerability against Session Initiation Protocol (SIP). Detecting a SIP server response of 400, Bad Request, can indicate a client can be incorrectly configured, or an attacker can be attacking your server. Further investigations of the client might be warranted.
References
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3