This looks like a DoS (Denial of Service) attack to me. If you are seeing a large number of packets with source address 0.0.0.0, then it is most likely a Dos attack.
You must block this traffic and I think you can also contact your ISP and ask them to block this traffic. In fact, as far as I know, all ISPs will implement this filtering called RPF check, Reverse path forwarding check. You can also ask them to track down the source of this traffic.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
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...