Archive for the ‘Network’ Category

Checking if a server is under ddos attack

Monday, June 4th, 2007

A quick and usefull command for checking if a server is under ddos is:

netstat -anp |grep ‘tcp\|udp’ | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n

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What is a null route?

Wednesday, May 30th, 2007

What is a null route?

A null route is a route that goes to nowhere.

The reason for creating a null route is to prevent your system from sending any data to a remote system.

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