if you are legitimately being blackmailed, you should probably get the authorities involved. Here in the US, that would be the FBI. Hopefully you have an equivalent. The chances that an IPS at the last mile is going to be effective against a botnet DDoS seems pretty unlikely. I would recommend working with your Internet Service Provider to see what help they can offer.
mhellman is correct, you can not protect yourself against a DDoS attack from your end. As long as the attacker has more bandwidth of attack traffic than you have in internet access, your internet access will be filled and rendered useless. Some ISP's offer DDoS scrubbing services. If your attacker is only using a few hosts your ISP may filter their IPs.
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...