Switched on logging out of curiosity to see these intrustion alerts what do they mean? 

Jun 24 22:20:08 (none) syslog.emerg syslogd started: BusyBox v1.00 (2013.03.19-08:17+0000)
Jun 24 22:39:06 (none) daemon.crit udhcpc: Received valid DHCP lease of ***.***.**.** from server, lease time 3600 , Connection UP.
Jun 24 22:40:09 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=203.14.32.9 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=113 ID=32284 DF PROTO=TCP SPT=55802 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 22:40:10 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=203.14.32.9 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=113 ID=32291 DF PROTO=TCP SPT=55805 DPT=80 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 23:00:20 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=86.68.151.34 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=118 ID=30987 DF PROTO=TCP SPT=51198 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 23:00:21 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=86.68.151.34 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=118 ID=30999 DF PROTO=TCP SPT=51206 DPT=80 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 23:09:07 (none) daemon.crit udhcpc: Received valid DHCP lease of ***.***.**.** from server, lease time 3600 , Connection UP.
Jun 24 23:17:27 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=197.6.167.7 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=26143 DF PROTO=TCP SPT=50163 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 23:18:04 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=197.6.167.7 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=27801 DF PROTO=TCP SPT=50254 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 23:39:07 (none) daemon.crit udhcpc: Received valid DHCP lease of ***.***.**.** from server, lease time 3600 , Connection UP.
Jun 24 23:40:20 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=121.178.205.177 DST=***.***.**.** LEN=60 TOS=0x00 PREC=0x00 TTL=51 ID=54040 DF PROTO=TCP SPT=2904 DPT=23 WINDOW=5840 RES=0x00 SYN URGP=0 MARK=0x8000000
Jun 24 23:41:39 (none) user.alert kernel: Intrusion -> IN=eth0 OUT= MAC=4c:17:eb:82:99:11:00:00:00:03:03:03:08:00 SRC=41.137.25.83 DST=***.***.**.** LEN=52 TOS=0x00 PREC=0x00 TTL=120 ID=1547 DF PROTO=TCP SPT=55074 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0 MARK=0x8000000