什么Intrusion?怎样读?

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什么Intrusion?怎样读?
Model: TP-Link TD-W8960N ADSL Router Modem

Aug 12 14:02:58	user	alert	kernel: Intrusion -> IN=ppp0 OUT= MAC= SRC=110.4.45.71 DST=115.135.201.131 LEN=44 TOS=0x00 PREC=0x00 TTL=59 ID=6674 DF PROTO=TCP SPT=32544 DPT=113 WINDOW=5840 RES=0x00 SYN URGP=0
Aug 12 14:03:20	user	alert	kernel: Intrusion -> IN=ppp0 OUT= MAC= SRC=78.8.83.125 DST=115.135.201.131 LEN=48 TOS=0x00 PREC=0x00 TTL=115 ID=1210 DF PROTO=TCP SPT=1092 DPT=80 WINDOW=65535 RES=0x00 SYN URGP=0
Aug 12 14:03:20	user	alert	kernel: Intrusion -> IN=ppp0 OUT= MAC= SRC=80.52.243.50 DST=115.135.201.131 LEN=48 TOS=0x00 PREC=0x00 TTL=114 ID=57684 DF PROTO=TCP SPT=63976 DPT=443 WINDOW=65535 RES=0x00 SYN URGP=0
Aug 12 14:03:21	user	alert	kernel: Intrusion -> IN=ppp0 OUT= MAC= SRC=188.195.226.194 DST=115.135.201.131 LEN=48 TOS=0x00 PREC=0x00 TTL=115 ID=1972 DF PROTO=TCP SPT=49437 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0
Aug 12 14:03:21	user	alert	kernel: Intrusion -> IN=ppp0 OUT= MAC= SRC=91.36.180.162 DST=115.135.201.131 LEN=52 TOS=0x00 PREC=0x00 TTL=116 ID=2232 DF PROTO=TCP SPT=49262 DPT=80 WINDOW=8192 RES=0x00 SYN URGP=0