LeakTest
LeakTest is a safe and small (27k bytes), completely benign chameleon utility which can be used to simulate the presence and effect of Trojan horses, viruses, and adware/spyware running in your computer. It simply and quickly tells you whether it has been able to slip out past your firewall's outbound Trojan/Virus/Spyware protections and establish a standard TCP connection with our NanoProbe server.
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Airscanner Mobile Firewall
Airscanner Mobile Firewall for Windows Mobile Pocket PC is a low-level, bi-directional, packet filtering firewall that examines all incoming and outgoing TCP/IP traffic. This personal firewall ensures that data is permitted based on access control lists that you select from a set of predefined filters, or from filters that you create yourself. The firewall parses packets as they come in (or go out) on the wire or over the air, and it matches the data against a rule set of ports and IP addresses, URLs, etc.
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Antinat SOCKS server
Antinat is a flexible SOCKS server and client library for writing proxy-based applications. It supports SOCKS 4, SOCKS 4a, SOCKS 5, authentication, CHAP, XML firewalling, Win32, server chaining, and UDP. It also contains very experimental IPv6 support.
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BullDog Firewall
Bulldog is a powerful but lightweight firewall for heavy use systems. With many features, this firewall can be used by anyone who wants to protect his/her systems.
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ROPE
ROPE is a "match module" for Linux IpTables that allows packets to be matched using highly flexible rules, written in a simple purpose-designed scripting language. It was written initially to provide support for the next phase of the P2PWall project for controlling various styles of peer-to-peer application traffic, but is much broader than this in it's possible uses. See the Basics page for a tutorial-style overview.
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IPFront
IPFront is a small tool named which enables users to generate IPSec rules easily. It really speeds-up the process of hardening Windows 2000/2003 in Bastion Host Environment. Additionally, it allows to set-up IPSec exceptions, and enables a couple of TCP/IP Stack protections against DoSes.
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Firestarter
Firestarter is graphical firewall tool for Linux. The program aims to combine ease of use with powerful features, serving both desktop users and administrators.
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NuFW
NuFW performs an authentication of every single connections passing through the IP filter, by transparently requesting user's credentials before any filtering decision is taken. Practically, this brings the notion of user ID down to the IP layers.
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Temprules
This project allows placing rules into an iptables based policy, and having these rules expire after a set time. This is useful for opening ports after successful port knocking, or for blocking source IPs using port sentry.
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ISIC -- IP Stack Integrity Checker
ISIC is a suite of utilities to exercise the stability of an IP Stack and its component stacks (TCP, UDP, ICMP et. al.) It generates piles of pseudo random packets of the target protocol. The packets be given tendancies to conform to. Ie 50% of the packets generated can have IP Options. 25% of the packets can be IP fragments... But the percentages are arbitrary and most of the packet fields have a configurable tendancy.
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