Diagnosing connections to the CensorNet Professional proxy

August 03, 2011 • Customer Services       
Synopsis

Sometimes it is useful to understand how many connections are active to the CensorNet server from unique source IP addresses. This can help you to diagnose performance issues or highlight a DoS attack from a computer on the network. The following commands can help.

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The following commands should be run as the root user from the CensorNet server command line.

Display a list of connections from unique IP addresses to the proxy (first column connection count, second column IP address)

netstat -n | grep 8080  | awk '{print $5;}' | cut -d : -f 1 | sort | uniq -c

Display a count of unique IP addresses connected to the proxy (also includes closed connections)

netstat -n | grep 8080  | awk '{print $5;}' | cut -d : -f 1 | sort | uniq | grep -c .

Display a count of unique IP addresses which have open and active connections to the proxy

netstat -n | grep 8080 | grep ESTAB | awk '{print $5;}' | cut -d : -f 1 | sort | uniq -c

Display the number of connections to the database server (more than 50 will cause performance issues)

netstat -n | grep 5432 | grep ESTAB -c

 

 

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Last modified on Thu, September 22, 2011 « Back