Runa Singh is the network administrator in charge of network security for a medium-sized company. The firm already has a firewall; its network is divided into multiple segments separated by routers, and it has updated virus scanners on all machines. Runa wants to take extra precautions to prevent DoS attacks. She takes the following actions:
1. She adjusts her firewall so that no incoming ICMP packets are allowed.
2. She changes the web server so that it uses SYN cookies.
Now consider the following questions:
1. Are there problems with any of her precautions? If so, what are the problems?
2. What additional steps would you recommend to Runa?
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