hi all .sorry for last thread about hack , but someone told me he can access my PC over the internet and thats why i asked that question
anyway when i test open port on my localhost it gave me this :
[root@Hamzah-PC ~]# nmap -sS localhost
Starting Nmap 5.00 ( http://nmap.org
) at 2009-10-13 23:05 EEST
Interesting ports on localhost (127.0.0.1):
Not shown: 995 closed ports
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
111/tcp open rpcbind
631/tcp open ipp
3306/tcp open mysql
am not good enough with networking ,can someone explain me what this port mean ? and how to open and close each one ?
also what you Device me to protect my PC ?