possible attack on my network

I've got a wireless network, my router sends the
connection to three wireless access points throughout our
building. In the base log I get this message about 5 times
per second, 24 hours a day, 7 days a week:

Connection attempt to base station from WAN blocked --

the IP address and port changes almost every few times.

I'm not really sure what this means, can anyone help me
out?

PS:
is this likely to make my connection slower? and is this
something I should do something about? and what?








>-----Original Message-----
>
>I've got a wireless network, my router sends the
>connection to three wireless access points throughout our
>building. In the base log I get this message about 5
times
>per second, 24 hours a day, 7 days a week:
>
>Connection attempt to base station from WAN blocked --
>
>the IP address and port changes almost every few times.
>
>I'm not really sure what this means, can anyone help me
>out?
>
>
>.
>