Security on cisco switches
 

How does cisco routers prevent from Dos attack?, Do they have inetral firewall?.

Thanks
Mark

You can block ip address/ranges and ports using access lists on a router.

Cisco have there own firewall called PIX that runs on dedicated hardware.

I have a similar question, can it autamatically detect if there is a Dos Attack or we have to find the IP and block manually.

I think that would be down to your network monitoring tools to highlight those issues for normal routers.

Here's a cisco doc on dos attacks

http://www.cisco.com/warp/public/707/4.html

Cisco PIX firewalls can automatically detect DOS attacks and deny them. But in the case of a router you need to have the ACLs in place to be safe

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Regards

Bill Stewart
Brampton Capital
wstewart@bramptoncapital.com
704-449-4697