we are trying to create custom vulnerability signature for triggering on the specific string in the udp packet payload with destination port 5060. Unfortunately there is no context for SIP. We used "Pattern Match" and chose "unknown -req-udp-payload" as a context. We applied a Vulnerability protection profile to the security policy (a rule allowing everything) but for some reason this didn't work as we expected. I mean we didn't receive any alert in the Threat log.
Is it possible to use "unknown -req-udp-payload" context for such purpose or it is intended only for the "unknown-udp" applications? Any other idea for creating such signature?
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