can you post your firwall filter output from the router ? do you have anything in input/output chains ?
This is in my firewall filters:
ros code
0 ;;; PortScanner: Port scanners to list
chain=input action=add-src-to-address-list protocol=tcp psd=21,3s,3,1 address-list=port scanners address-list-timeout=2m
1 ;;; PortScanner: NMAP FIN Stealth scan
chain=input action=add-src-to-address-list tcp-flags=fin,!syn,!rst,!psh,!ack,!urg protocol=tcp address-list=port scanners address-list-timeout=2m
2 ;;; PortScanner: SYN/FIN scan
chain=input action=add-src-to-address-list tcp-flags=fin,syn protocol=tcp address-list=port scanners address-list-timeout=2m
3 ;;; PortScanner: SYN/RST scan
chain=input action=add-src-to-address-list tcp-flags=syn,rst protocol=tcp address-list=port scanners address-list-timeout=2m
4 ;;; PortScanner: FIN/PSH/URG scan
chain=input action=add-src-to-address-list tcp-flags=fin,psh,urg,!syn,!rst,!ack protocol=tcp address-list=port scanners address-list-timeout=2m
5 ;;; PortScanner: ALL/ALL scan
chain=input action=add-src-to-address-list tcp-flags=fin,syn,rst,psh,ack,urg protocol=tcp address-list=port scanners address-list-timeout=2m
6 ;;; PortScanner: NMAP NULL scan
chain=input action=add-src-to-address-list tcp-flags=!fin,!syn,!rst,!psh,!ack,!urg protocol=tcp address-list=port scanners address-list-timeout=2m
7 ;;; PortScanner: dropping port scanners
chain=input action=drop src-address-list=port scanners
8 ;;; BruteforceLoginPrevention: ftp blacklist
chain=input action=add-dst-to-address-list protocol=tcp address-list=ftp_blacklist address-list-timeout=3h content=530 Login incorrect
9 ;;; BruteforceLoginPrevention: allow only 10 FTP login incorrect/min
chain=input action=accept protocol=tcp content=530 Login incorrect dst-limit=1/1m,9,dst-address/1m
10 ;;; BruteforceLoginPrevention: drop ftp brute forcers
chain=input action=drop protocol=tcp src-address-list=ftp_blacklist dst-port=21
11 ;;; BruteforceLoginPrevention: ssh_stage1
chain=input action=add-src-to-address-list connection-state=new protocol=tcp address-list=ssh_stage1 address-list-timeout=1m dst-port=22
12 ;;; BruteforceLoginPrevention:ssh_stage2
chain=input action=add-src-to-address-list connection-state=new protocol=tcp src-address-list=ssh_stage1 address-list=ssh_stage2 address-list-timeout=1m dst-port=22
13 ;;; BruteforceLoginPrevention:ssh_stage3
chain=input action=add-src-to-address-list connection-state=new protocol=tcp src-address-list=ssh_stage2 address-list=ssh_stage3 address-list-timeout=1m dst-port=22
14 ;;; BruteforceLoginPrevention:ssh_blacklist
chain=input action=add-src-to-address-list connection-state=new protocol=tcp src-address-list=ssh_stage3 address-list=ssh_blacklist address-list-timeout=1w3d dst-port=22
15 ;;; BruteforceLoginPrevention: drop ssh brute forcers
chain=input action=drop protocol=tcp src-address-list=ssh_blacklist dst-port=22