DDOS Attack

[saquib.tandel]

Hi

We are getting DDOS attack again, tcp intercept doesnt help anymore.

Setup

INTERNET-----------------Internet_router---------ASA_firewall----------------Layer3_SW-------------LAN

Internet_Router = 2800

ASA Firewall = 5520

Layer3_SW = 4500

Source are different IP so blocking with ip not possible.

Any experience input would be appreciated.

Thanks

ST

[John Blakley]

I see this is a day late, but for future reference you can generally contact your ISP and they can block the excess traffic for you. I contacted my ISP for their "emergency support" phone numbers and they verified that they could stop the traffic. You may want to look into that.

HTH,

John

[saquib.tandel]

Hi

ISP block the traffic for the public ip but services are impacted.

Any suggested solution to overcome DDOS attack

Wondering how Banks , Stock Trading  Organization , Corporates like Microsoft / Cisco survive these DDOS Attack

[Edison Ortiz]

Wondering how Banks , Stock Trading  Organization , Corporates like 
Microsoft / Cisco survive these DDOS Attack

Usually all hands-on-deck and involve all vendors... You need to be on the phone with these people.. Public forums is not the right avenue to obtain this kind of help where a lot of confidential information needs to be discussed.

Regards

Edison