port forwarding weirdness

Hi all,

I have been experimenting with freesco http://www.freesco.org (FREE ciSCO)
router distro as a replacement for Linux Router Project. I have a DNS Server
setup behind the firewall servicing port 53 requests.

I have Freesco and running and all is well except for DNS. I have a DNS
server behind it and I have ports 53 udp and tcp passed through to it. I
keep getting these errors:

Jul 21 18:47:21 - kernel: IP fw-in rej eth0 UDP 64.14.66.100:11415
206.165.207.198:53 L=58 S=0x00 I=0 F=0x0040 T=51
Jul 21 18:47:36 - last message repeated 4 times
Jul 21 18:47:36 - kernel: IP fw-in rej eth0 UDP 64.14.66.100:12057
206.165.207.198:53 L=69 S=0x00 I=0 F=0x0040 T=51
Jul 21 18:47:44 - kernel: IP fw-in rej eth0 UDP 64.14.66.100:11415
206.165.207.198:53 L=58 S=0x00 I=0 F=0x0040 T=51
Jul 21 18:47:56 - last message repeated 4 times
Jul 21 18:47:58 - kernel: IP fw-in rej eth0 UDP 64.14.66.100:12057
206.165.207.198:53 L=58 S=0x00 I=0 F=0x0040 T=51
Jul 21 18:48:00 - kernel: IP fw-in rej eth0 UDP 64.14.66.100:11415
206.165.207.198:53 L=58 S=0x00 I=0 F=0x0040 T=51
Jul 21 18:48:25 - last message repeated 4 times
Jul 21 18:48:27 - kernel: IP fw-in rej eth0 UDP 64.14.66.100:12057
206.165.207.198:53 L=58 S=0x00 I=0 F=0x0040 T=51
Jul 21 19:04:20 - kernel: IP fw-in rej eth0 UDP 151.203.0.85:44947
206.165.207.198:53 L=64 S=0x00 I=61649 F=0x0040 T=245


My question is what causes these? Is it a hack attempt?

Sean