você provavelmente precisará de nmap
Nmap (“Network Mapper”) is an open source tool for network exploration
and security auditing. It was designed to rapidly scan large networks,
although it works fine against single hosts. Nmap uses raw IP packets
in novel ways to determine what hosts are available on the network,
what services (application name and version) those hosts are offering,
what operating systems (and OS versions) they are running, what type of
packet filters/firewalls are in use, and dozens of other
characteristics. While Nmap is commonly used for security audits, many
systems and network administrators find it useful for routine tasks
such as network inventory, managing service upgrade schedules, and
monitoring host or service uptime.
verifique a página do manual do comando nmap 
Aqui está uma lista de ferramentas de rede nas quais você poderia se interessar:
1) Wireshark - analisador de tráfego de rede
2) Nessus - Auditor de segurança de rede remota
3) Nmap - O Network Mapper
4) Etherape - monitor gráfico de rede modelado após etherman
5) Ferramenta de monitoramento Kismet - Wireless 802.11b
6) Chkrootkit - Verifica se há sinais de rootkits no sistema local
7) Rkhunter - scanner de rootkit, backdoor, sniffer e exploit
8) tiger - Reportar vulnerabilidades de segurança do sistema
e muito mais ferramentas de segurança aqui