• Dig – DNS lookup utility
• DNSMap – DNS mapping is a mechanism which allows hosts on a private LAN to use DNS Services even if the address of an actual DNS Server is unknown.
• DNSTracer – Trace DNS queries to the source
• DNSWalk – Checks DNS zone information using nameserver lookups
• Netmask – Helps determine network masks
• Relay Scanner – This program is used to test SMTP servers for Relaying problems
• TCPTraceroute – Traceroute implementation using TCP packets
• Firewalk – Firewalk is a network auditing tool that attempts to determine what transport protocols a given gateway will pass.

• Amap – Performs fast and reliable application protocol detection, independent of the TCP/UDP port they are being bound to.
• Curl – Get a file from an HTTP, HTTPS or FTP server
• Fping – Sends ICMP ECHO_REQUEST packets to network hosts
• Hping3 – Active Network Smashing Tool
• HTTprint – A web server fingerprinting tool
• Ike-Scan – IPsec VPN scanning, fingerprinting and testing tool
• MetoScan – HTTP method scanner
• Namp – The Network Mapper
• Netcat – TCP/IP swiss army knife
• P0f – Passive OS fingerprinting and masquerade detection utility
• Zenmap – The Network Mapper Front End

• Chntpw – NT SAM password recovery utility
• Rainbowcrack – Crack LM, MD5 and SHA1 hashes
• THC PPTP Bruter – A brute forcing program against PPTP VPN endpoints (TCP port 1723)
• VNCrack – Crack VNC passwords
• John the ripper – A fast password cracker

• DHCP Dump – DHCP packet dumper
• Dsniff – Password sniffer
• SSLDump – Dump SSL traffic on a network
• Ntop – Displays top network users
• Wireshark – Interactively dump and analyze network traffic

• File2cable – Sends a file as a raw ethernet frame
• Netsed – Network packet streaming editor
• Sing – Send ICMP Nasty Garbage packets to network hosts
• TCPreplay – Replay network traffic stored in pcap files

• Aircrack-ng – Aircrack-ng is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data packets have been captured.
• Kismet – Wireless sniffing and monitoring
• THC Leap Cracker – The THC LEAP Cracker Tool suite contains tools to break the NTChallengeResponse encryption technique e.g. used by Cisco Wireless LEAP Authentication.
• WEPCrack – WEPCrack is an open source tool for breaking 802.11 WEP secret keys.
• WIDZ – Wireless Intrusion Detection System
• Cowpatty – Brute-force dictionary attack against WPA-PSK

• GDB – The GNU Debugger.
• Hexdump – ASCII, decimal, hexadecimal and octal dump tool.
• Hexedit – View and edit file in hexadecimal or in ASCII
• Wipe – Securely erase files
• Madedit -Text/Hex Editor

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