Intention of this query is I badly needed testing the below iptables rules.
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I want to block port scan(tcp/udp) so that anyone doing port scan should be blocked for mu router gateway.
I have the following rules:

iptables -A INPUT -m recent --name portscan --rcheck --seconds 500 -j DROP
iptables -A FORWARD -m recent --name portscan --rcheck --seconds 500 -j DROP

iptables -A INPUT -m recent --name portscan --remove
iptables -A FORWARD -m recent --name portscan --remove

iptables -A INPUT -p tcp -m tcp --dport 139 -m recent --name portscan --set -j DROP
iptables -A FORWARD -p tcp -m tcp --dport 139 -m recent --name portscan --set -j DROP

But I badly need of testing the above rules.
I tried with nmap but same result is getting for enable and disable for this port scan. output of nmap is below:

[root@xconf technicolor]# nmap 192.168.5.177
Starting Nmap 6.40 ( http://nmap.org ) at 2017-10-12 07:30 EDT
Nmap scan report for 192.168.5.177
Host is up (0.020s latency).
Not shown: 994 filtered ports
PORT STATE SERVICE
20/tcp closed ftp-data
21/tcp closed ftp
22/tcp closed ssh
161/tcp closed snmp
990/tcp closed ftps
8080/tcp open http-proxy
Nmap done: 1 IP address (1 host up) scanned in 17.87 seconds

Appreciate a helping hand.Thank you in advance.

How are you populating the portscan DB? Are you using the '--set' option anywhere? Without the set nothing is placed into the portscan DB thus you have nothing to match against.

Hi
I did not use any set commands. can you please give syntax for set.
can you explain about the options used i.e ---recent and --rcheck from the above rules.

You can look through here and if you still have issues let me know.

IPTALBES RECENT SETUP