Incessant firewall alerts!

Incessant firewall alerts!

Hello all

I hope you can help me with my problem as I am going nuts! the firewall is
picking a lot of 'Alerts!' with the
below information (had to remove IPs - 'attackers' and our public IP)

SOURCE PORT DESTINATION PORT
11646 Unassigned 5138 Unassigned
11653 Unassigned 4344 VinaInstall
13373 Unassigned 5616 Unassigned
13378 Unassigned 7520 Unassigned
53644 PRIVATE 5276 Unassigned
15726 Unassigned 6306 Unassigned
64567 PRIVATE 4412 Unassigned
1791 EA1 7552 Unassigned
2424 KOFAX-SVR 5374 Unassigned
2433 codasrv-se 5742 IDA Discover Port 2
58605 PRIVATE 6090 Unassigned

The source port on the left, is being reported in the same event with the
destination port on the right...

Can anyone tell me what is this about?? is this some sort of hacking or
simply port scans?

Thanks a lot