The 'new' HTTP engine will not normally alarm in the referer field, when looking for a URL. A change was made in service pack 4 (I believe) that fixed that.
Your example is actually of a signature that was written in the TCP.STRING engine and the problem lies within how the signature was written, basically you uncovered a bug in a signature. This will be fixed in our next scheduled release (S19).
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...