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SNMP DDoS Attacks Spike
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RyanSepe
RyanSepe,
User Rank: Ninja
5/31/2014 | 10:53:17 PM
Verizon Security Report
In the Verizon Security Report for 2013, its stated that one of the highest levels of attacks is overall DoS. Are these attacks spiking only in 2014 or were they starting to become prevalent last year? I would be interested to see if they were or were not encompassed by the report. Ill have to do more research but any insight would be helpful. Thanks,
RetiredUser
RetiredUser,
User Rank: Ninja
5/23/2014 | 10:42:56 AM
Re: Be DDoS Attack Ready
While disabling SNMPv1 and v2 in favor of v3 (whose messages have encoded as an octet string security parameters) is preferred, network IT staff should still look with caution upon any infrastructure using SNMPvX...

Not come down hard on SNMP, of course!
Kelly Jackson Higgins
Kelly Jackson Higgins,
User Rank: Strategist
5/23/2014 | 9:49:46 AM
Re: Be DDoS Attack Ready
Thanks for sharing those best practices, @christianabryant. Hopefully, the SNMP research will prompt orgs to also check on their SNMPv2 settings or go SNMP 3.
RetiredUser
RetiredUser,
User Rank: Ninja
5/23/2014 | 12:29:38 AM
Be DDoS Attack Ready
Calls to mind Dave's commentary "DDoS Attack!" from a couple months back and how SNMP and others under UDP have the highest threat potential: http://www.darkreading.com/attacks-and-breaches/ddos-attack!-is-regulation-the-answer/d/d-id/1114050

Also, some tips to protect yourself against reflective attacks:

1) If you can afford to, bring down open recursive DNS servers that can be used as reflectors.

2) Assign rate-limits to queries on source-IPs for all DNS servers.

3) Use TCP for re-transmission of certain DNS query types.

4) Use "principle of least privilege" network filtering on all hosts and network devices, and comply to security recommendation like Common Criteria.

5) Have a solid response/defense/recovery strategy for quick bounce-back from successful DDoS attacks.


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