A generic IP network transaction auditing tool that performs network monitoring.
Tool that interactively builds a firewall using ipfwadm, ipchains, or netfilter/iptables firewalling. [GPL]
A packet sniffing tool, based on the Berkeley packet capture library; that prints complete data-link, network, and transport layer header information for all packets it sees.
Performs logging of incoming IP packets by utilizing a multi-threaded approach. Administrators can perform filtering of captured packets.
A network scanner that detects Microsoft Windows shares using the SMB protocol.
Cheops is a complex network utility integration tool that offers network topographic visualization.
A set of network diagnostic tools, such as an enhanced replacement for traceroute.
A Crypto IP Encapsulation project. Offers a protocol that passes encrypted packets between prearranged routers in the form of UDP packets.
Freeware PGP, Pretty Good Privacy interoperable encryption software package. CTC is Rot13 for PGP.
A circuit-level firewall and proxy that can be used to provide convenient and secure network connectivity to a wide range of hosts. Very similar to a SOCKS implementation.
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