A runlevel is one of the modes that a Unix-based operating system will run in. Each runlevel has a certain number of services stopped or started, giving the user control...

Spoofing, in general, is a fraudulent or malicious practice in which communication is sent from an unknown source disguised as a source known to the receiver. Spoofing is most prevalent...

FTP is used to transfer files between computers on a network. Package name : Vsftpd-*, Service name :vsftpdport:20,21(default), Configuration file:/etc/vsftpd/vsftpd.conf [main], /etc/vsftpd/ftpusers etc.

Packages : squid*, Service Name: squid, Default port : 3128, Config File: /etc/squid/squid.conf, Log file Path: /var/log/squid

Package name: Samba, samba-client samba-winbind, Service name: smb, Port: Samba Use TCP ports: 139 and 445, UDP Ports: 137 and 138, Configuration File: /etc/samba/smb.conf