이건 어떤 공격인가요?? LAST_ACK ...

찬스의 이미지

웹서버가 죽어서 netstat -at로 확인했을때 요렇게 뜨는데..
이건 어떤 공격인가요??

1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55697     LAST_ACK    
tcp        1      1 ns1.xxx.co.kr:www 221.168.205.244:4606    LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55501     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55492     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 218.232.150.189:35117   LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55633     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55632     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55635     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55634     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55637     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55636     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55639     LAST_ACK    
tcp        1      1 ns1.ns1.xxx.co.kr.co.kr:www 61.132.133.38:55638     LAST_ACK    
tcp      601      0 ns1.ns1.xxx.co.kr.co.kr:www 61.111.7.200:1329       ESTABLISHED 
tcp      600      0 ns1.ns1.xxx.co.kr.co.kr:www 61.111.7.200:1328       ESTABLISHED 
tcp      601      0 ns1.ns1.xxx.co.kr.co.kr:www 61.111.7.200:1331       ESTABLISHED