$ dmesg ....... possible SYN flooding on port xxx. Sending cookies. possible SYN flooding on port xxx. Sending cookies. possible SYN flooding on port yyy. Sending cookies. possible SYN flooding on port yyy. Sending cookies. possible SYN flooding on port xxx. Sending cookies. possible SYN flooding on port xxx. Sending cookies. possible SYN flooding on port xxx. Sending cookies. Cause This could be