Friday 8 April 2011

Network Attacks and Mitigation

I am sure this will be beneficial to all the people who are planning to appear in CCIE SEC main attacks and mitigation cramm sheet.




  • FRAGMENT TINY ATTACK/BUFFER OVERFLOW ATTACK:

Resolve with ACL using fragment keyword or usefragment inside or fragment outside in ASA command




  • SMURF Attack:

Drop and stop ICMP Echo . Also can do CAR





  • FRAGGLE Attack:

Drop and stop UDP echo. Also can do CAR




  • RECONNISSANCE/SCAN Attack:

no ip unreachables under router interface or threat-detection in ASA






  • TCP SYNC DoS Attack :

static or nat in ASA setting , MPF is also in ASA to fix this up in tcp-map .on router, you can use tcp intercept command.





  • UDP DOS Attack:

CBAC or ZBF on router.Threat Detection on ASA.




  • MiTM Attack in BGP:

Password in BGP Peers,GTSM setting.





  • Stealthing FIREWALL:

Stop firewall from responding to PING or TRACE.





  • SinK Holes and Black Holes:

static route command play with BGP Routing




  • IP Spoofing ATTACK:

uRPF on router. BOGON Address filtering (RFC 3330, RFC 2827 , RFC 1918 , RFC 1700 etc)uRPF on ASA .





  • DHCP Starvation Attack:

DHCP Snooping protection and Binding database.





  • ARP Poisoning Attack:

Dynamic ARP Inspection (DAI)




  • IP MAC Spoofing in Switches:

IPSG with IP or IPSG with IP+MAC setting!

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