Tampilkan postingan dengan label lsof tcpdump. Tampilkan semua postingan
Tampilkan postingan dengan label lsof tcpdump. Tampilkan semua postingan

Selasa, 25 Mei 2010

piping tcpdump output to lsof

This simple Bash script will output the lsof end of any foreign network connection:
[Set to the interface of your choice]
while [ 1 ]
        do
                for i in `tcpdump -i rl0 -c 1 -l dst $(hostname) | awk '{print $2}' | awk -F"." '{print $1"."$2"."$3"."$4}'`
                         do lsof -i@$i
                done
done
with time/date stamp added and headers removed:
while [ 1 ]

        do
                for i in `tcpdump -i rl0 -c 1 -l dst $(hostname) | awk '{print $2}' | awk -F"." '{print $1"."$2"."$3"."$4}'`
                         do echo `date -u` `lsof -i@$i | grep -v PID`
                done
done

Run like this:
./tcp_lsof.sh >> tcp.lsof.log &

the script produces output like this:

COMMAND   PID     USER   FD   TYPE     DEVICE SIZE/OFF NODE NAME
sshd    18392 rferrisx    5u  IPv4 0xd699ac80      0t0  TCP rmflaptop.rmfdevelopment.com:ssh->192.168.0.3:13974 (ESTABLISHED)
sshd    29850     root    5u  IPv4 0xd699ac80      0t0  TCP rmflaptop.rmfdevelopment.com:ssh->192.168.0.3:13974 (ESTABLISHED)
or
Wed May 26 15:22:06 UTC 2010 sshd 9448 root 5u IPv4 0xd699ac80 0t0 TCP rmflaptop.rmfdevelopment.com:ssh->192.168.0.3:15729 (ESTABLISHED) 
sshd 29734 rferrisx 5u IPv4 0xd699ac80 0t0 TCP rmflaptop.rmfdevelopment.com:ssh->192.168.0.3:15729 (ESTABLISHED)
Wed May 26 15:22:07 UTC 2010 sshd 9448 root 5u IPv4 0xd699ac80 0t0 TCP rmflaptop.rmfdevelopment.com:ssh->192.168.0.3:15729 (ESTABLISHED) 
sshd 29734 rferrisx 5u IPv4 0xd699ac80