1.Nikto – security tools for Linux:
Nikto is an open sourceweb server scanner for Linux that allow you to perform comprehensive tests against 6400 potentially dangerous files/CGIs, Regularly checks for outdated versions of over 1200 servers, and solve version specific problems on over 270 servers. It is the SSL and HTTP Proxy support.
2..network protocol analyzer for Linux:
Ethereal is a one of the most popular multi-platform network protocol analyzer used by network professionals to troubleshooting and analysis the software, protocol development and education.
3. Nmap – Linux security tool and network mapper:
Nmap is a know as Network mapper for network exploration or security auditing. it’s free and open source software for system and network administrator to conduct many useful tasks such as network inventory, manage service upgrade schedules and monitor host or service uptime.
4.Wireshark – network protocol analyzer for Linux / Unix:
Wireshark is a one of the best network protocol analyzer which help you to capture and interactively browse the traffic running on a your computer network.
5.Nessus vulnerability scanner for Linux:
Nessus vulnerability scanner is a one of the most widely use vulnerability scanning program for system administrator to detect the potential vulnerabilities on the network systems.
6.ClamAV – Antivirus Engine for Linux:
ClamAV is an open source antivirus software specially designed to detect Trojans, viruses, malware and other malicious threats.
7. Snort – Network security and intrusion prevention tool:
Snort is an open source, lightweight network intrusion prevention and detection system that help you to analysis real time traffic and packet logging on IP networks.
8.John the Ripper for Linux:
John the Ripper, it’s a free and open source password cracker that help you to detect weak Unix passwords. it’s multi platform software and provide support for various password hash types such as Windows LM hashes etc.