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Capture SMTP / POP3 Email
$ sudo tcpdump -nn -l port 25 | grep -i 'MAIL FROM|RCPT TO' View this command to comment, vote or add to favourites View all commands by wuziduzi Diff your entire server config at ScriptRock.com Article Source.
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Extract HTTP Passwords in POST Requests
$ sudo tcpdump -s 0 -A -n -l | egrep -i "POST /|pwd=|passwd=|password=|Host:" View this command to comment, vote or add to favourites View all commands by wuziduzi Diff your entire server config at ScriptRock.com Article Source.
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Capture FTP Credentials and Commands
$ sudo tcpdump -nn -v port ftp or ftp-data View this command to comment, vote or add to favourites View all commands by wuziduzi Diff your entire server config at ScriptRock.com Article Source.