am i scanning other ip's?

["Alfredo D" <adiaz () lareira com>]

hi. First of all excuse my english

i'm new to snort, but i installed a Mandrake Firewall that uses it, and looking in logs i found this in portscan.log
it seems like my computer is doing portscans to other ip's. right?
what is SYN ******S*?
the ports 61XXX?
i installed the computer two days ago. is being hacked?

Jan 1 10:05:18 [my own ip]:61591 -> 216.239.39.101:80 SYN ******S* 
Jan 1 10:05:20 [my own ip]:61593 -> 66.35.229.200:80 SYN ******S* 
Jan 1 10:05:40 [my own ip]:61594 -> 64.70.54.43:80 SYN ******S* 
Jan 1 10:05:44 [my own ip]:61596 -> 216.239.39.101:80 SYN ******S* 
Jan 1 10:05:47 [my own ip]:61597 -> [isp dns]:53 UDP 
Jan 1 10:05:48 [my own ip]:61598 -> [isp dns]:53 UDP 
Jan 1 10:05:48 [my own ip]:61597 -> [isp dns]:53 UDP 
Jan 1 10:05:48 [my own ip]:61599 -> 64.152.64.67:80 SYN ******S* 
Jan 1 10:05:59 [my own ip]:61600 -> 216.239.39.101:80 SYN ******S* 
Jan 1 10:06:00 [my own ip]:61601 -> 64.152.64.67:80 SYN ******S* 
Jan 1 10:06:10 [my own ip]:61602 -> 216.239.39.101:80 SYN ******S* 
Jan 1 10:06:17 [my own ip]:61603 -> [isp dns]:53 UDP 
Jan 1 10:06:18 [my own ip]:61603 -> [isp dns]:53 UDP 
Jan 1 10:06:19 [my own ip]:61604 -> [isp dns]:53 UDP 
Jan 1 10:06:19 [my own ip]:61603 -> [isp dns]:53 UDP 
Jan 1 10:06:20 [my own ip]:61606 -> 63.209.80.228:80 SYN ******S* 
Jan 1 10:06:23 [my own ip]:61607 -> 63.209.80.244:80 SYN ******S* 
Jan 1 10:06:23 [my own ip]:61608 -> 63.209.80.244:80 SYN ******S* 
Jan 1 10:06:23 [my own ip]:61609 -> 63.209.80.229:80 SYN ******S*