Router Log - Should I be worried

[#1]

just had a look at the log and noticed the following entries which I don't think I've seen before. Anyone know what they are and whether they are cause for concern? The xxxx entries are my PN assigned IP address
Nov 14 11:21:36 FIREWALL replay check (1 of 2): Protocol: ICMP Src ip: 182.249.31.191 Dst ip: xxxxxxxxxx Type: Destination Unreachable Code: Port Unreacheable

Nov 14 10:53:52 IDS scan parser : tcp port scan: 199.168.103.238 scanned at least 10 ports at xxxxxxxxxxxx. (1 of 3) : 199.168.103.238 xxxxxxxxxxx 0040 TCP 80->63494 [...R..] seq 181415068 win 0

Nov 14 09:06:59 FIREWALL replay check (1 of 2): Protocol: ICMP Src ip: 192.168.1.66 Dst ip: 84.92.113.56 Type: Destination Unreachable Code: Port Unreacheable

Nov 14 09:00:01 IDS scan parser : tcp port scan: 173.194.34.76 scanned at least 10 ports at xxxxxxxx. (1 of 1) : 173.194.34.76 xxxxxxxx0040 TCP 80->60545 [...R..] seq 2404602120 win 0

Nov 14 02:32:24 FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 175.156.237.255 Dst ip: xxxxxxx Type: Destination Unreachable Code: Port Unreacheable

Nov 14 01:51:04 FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 50.23.224.106 Dst ip:xxxxxxxxxx Type: Echo Reply Code: 0

Nov 13 23:25:29 FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 50.23.224.106 Dst ip:xxxxxxxx Type: Echo Reply Code: 0

Nov 13 22:58:35 FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 192.168.1.64 Dst ip: 192.168.1.254 Type: Destination Unreachable Code: Port Unreacheable

Nov 13 22:49:44 IDS scan parser : tcp port scan: 199.168.103.238 scanned at least 10 ports at xxxxxxx. (1 of 1) : 199.168.103.238 xxxxxxx0040 TCP 80->57348 [...R..] seq 796781173 win 0

Nov 13 21:36:07 FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 204.188.199.216 Dst ip: xxxxxxType: Destination Unreachable Code: Port Unreacheable

Nov 13 21:04:31 FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 204.188.199.216 Dst ip: xxxxxxxxxx Type: Destination Unreachable Code: Port Unreacheable

[#2]

I'd not be overly concerned as it means your firewall is doing it's job.
I'd perhaps check the logs for things like this periodically but I'd only really be concerned if I noticed events like that being logged repeatedly and on a frequent basis.

[#3]

Thanks a lot
PT