How to block ports and IP's ?

[host.co.in]

I want to block a port 3987 and IP 211.147.147.147 on the server. Please give me possible solutions for this as there may be a firewall on the server like apf for doing this and there may be not. What would you do if there is apf and what would you do if apf is not there on the server ?

[PoojaS]

If apf is installed on the server then if the port is not listed in IG_TCP_CPORTS then it is blocked. and to block a particular IP, command is apf -d IP ( apf -d 211.147.147.147)
If apf is not installed on the server then you can use iptables for the same purpose.
To block port,
iptables -A INPUT -p tcp -s port -j REJECT
(iptables -A INPUT -p tcp -s 3987 -j REJECT)

To block IP
iptables -A INPUT -p tcp -s IP -j REJECT
(iptables -A INPUT -p tcp -s 211.147.147.147 -j REJECT)

[Tukaram]

You can block the ip by "route add I.P reject" command