1. Terabit Scale Edge DDoS Protection
Peter Cutler Senior Systems Engineer

2. Is DDoS Still on the increase?
500 Gbps Hong Kong attack France swarmed after terror attack PlayStation & Xbox hit at Christmas
Mirai Botnet OVH / Krebs / DYN 600 Gbps -> 1Tbps
Memcached GitHub Tbps
Anon hits Church of Scientology
Spamhaus attack: Reported to reach 310 Gbps
Rio Olympics 540 Gbps
Spammers discover botnets
Reaper Botnet 2M Devices
First Hacktivists: Zapatista National Liberation Army
ProtonMail
attack
Estonia: Parliament, banks, media, Estonia Reform Party
Coordinated US bank attacks: Grew to 200 Gbps, and continue today
DoS for Notoriety
2019 ??
1993 …
2005
2007
2009
2011
2013
2015
2016
2017
2018

3. DDoS Evolution in 2018 High Bandwidth Botnets Multivector
memcached exceeds 1Tbps, routinely > 100Gbps
Botnets
Mirai (and its many known variants)
IoT (100s of Millions of easy to recruit devices)
Multivector
10+ vectors, Additive + Variation + Spray/Subnet
Booter/Stresser Services
the “10 minute” attack and pulsed attacks

4. DDoS is an evolving and increasing threat
Key Trends
Statistically: Frequent, Low Volume, Short Duration Attacks dominate
DDoS is an evolving and increasing threat
Example statistics across Corero customer networks
Corero Full Year 2018 Trends Report:

5. SP/Telco DDoS Scrubbing Protection
DDoS attacks arriving from transit/peering
Good traffic destined for subscribers SP SP SP
ingress from transit/peering
Service Provider
egress to subscribers
DDoS victims
DDoS victims

6. SP/Telco DDoS Scrubbing Redirect
DDoS attacks arriving from transit/peering
Good traffic destined for subscribers SP SP SP
ingress from transit/peering
Netflow Detect (out-of-band)
Service Provider
egress to subscribers
DDoS victims
DDoS victims

7. SP/Telco Large DDoS Attack Blackhole
DDoS Attacks arriving from transit/peering SP SP SP
ingress from transit/peering
BGP redirect
Netflow Detect (out-of-band)
Scrubbing Capacity (<10% edge capacity)
note: Some Providers will have multiple scrubbing centers for Geos, redundancy, backhaul reasons.
Service Provider
egress to subscribers
Good traffic tunneled to edge or customer
Good traffic tunneled to edge or cust

8. Scrubbing Approach Increasingly Challenged
Size of Attack
Blackhole Zone (some FlowSpec)
Provider Edge Capacity
100s of Gbps to multiple Terabits/sec
Provider RTBH Mitigation
Manual instantiation of blackholes with target offline for duration of attack
Attacks
Partial Protection (needs to be > 10%)
Scrubbing Zone
Number of Attacks

9. How to Improve? Enhanced Accuracy + Speed of DDoS Detection/Mitigation
DDoS Attack Over Scrubbing Capacity Succeed!
Flow Monitoring
Aggregation delay
Attack overload
Header only
BGP/RTBH/FlowSpec
BGP propagation
Limited visibility
Sampled Mirror
Immediate forwarding
Scales with attack
Header and payload
ACL Filters
Rapid configuration
Streaming telemetry

10. New Opportunity for Edge Mitigation
NOC/SOC
Network Edge
Monitor
Inspect
Detect
Report / Signal
Mitigate
Sampled Mirror (1:N)
Seconds
Sampled Mirror (tuple + payload)
Streaming Telemetry
Ingress Traffic
Egress Traffic
Filter Generation (tuple + payload)
Dynamic Filter (tuple + payload)
Detection
Mitigation

11. Full Edge Capacity Mitigation
Size of Attack
Blackhole Zone
Provider Edge Capacity
100s of Gbps to multiple Terabits/sec <1% of attacks need to be blackholed
100% Edge Protection
Provider Edge Mitigation Zone
Provider Edge Mitigation
Leverage real-time data and analytics to deliver intelligent automation
Scales to Tens of Terabits of DDoS Protection
Attacks
Provider Scrubbing Capacity
>90% attacks mitigated at Provider Edge <10% redirected to scrubbing
Scrubbing Zone
Number of Attacks

12. Total Provider Edge DDoS Protection
DDoS Attacks arriving from transit/peering
Internet SP SP SP
ingress from transit/peering
netconf
Service Provider
egress to subscribers
Good traffic to edge or cust
Good traffic to edge or cust

13. Example Edge Filtering with Juniper MX
Matching Firewall-type rules with defined actions
Filters entered manually, or programmatically via netconf API
Unique ID for each filter provides statistics via remote telemetry

14. Summary DDoS as a whole still on the Increase
Attack Methods/Vectors more Sophisticated
Emerging trend for increase in proportion of larger attacks
Traditional Scrubbing/RTBH Protection. Industry is moving on
Typically too slow to react to avoid damage, or completes attack
Wastes core network bandwidth backhauling junk DDoS traffic
New Opportunity for Protection on Network Edge Devices
Leverage built-in power of latest infrastructure devices
No need to insert new devices at every ingress point
Deliver always-on protection at edge capacity up to unprecedented scale
Can operate as an overlay to existing scrubbing centers
Deploy filters automatically from DDoS protection solution

15. Questions?

16. Thank You!