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Knocker is a simple, versatile, and easy-to-use TCP security port scanner written in C, using threads. It is able to analyze hosts and the network services which are running on them. It is available for Linux, FreeBSD, Unix, and Windows95/98/2000.
An iptables based firewall for systems running the Linux 2.4 or later kernel. Very flexible configuration allows the firewall to be used in a wide variety of firewall/gateway/router and VPN environments.
This is a simple Webinterface to ban or unban IPs with Fail2Ban. Written in PHP. Uses fail2ban-client operations on the local socket.
Questions? Contact me: steffen[at]simails.de
Update for Debian 13 Trixie and others running systemd:
To get the socket-permission fix working, do this:
1. systemctl edit fail2ban
[Service]
ExecStartPost=/bin/sh -c 'while [ ! -S /var/run/fail2ban/fail2ban.sock ]; do sleep 0.2; done; chmod 0766 /var/run/fail2ban/fail2ban.sock'
-> strg+o,...
ddos_deflate, el Guapo Edition is network trench defense!
Assuming a firewall (whether in hardware or in software via IPTables / IPChains / or another software firewall), then the bulk of your nefarious traffic is (hopefully) already being taken care of. However, what slips through, on legitimate ports, can sometimes be denial of service attacks. A truly distrubuted denial of service attack is something for where there exists no known solution (at least at this time). However, a single user dos (or a small number of users working together) can...
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Personal firewall for linux desktop and android phone
This is extremely handy for Android Phones, as now most third-party Apps from mobile market is now close-sourced and it's hard to promise its security, but some of this functions may be tempting, so we have to install it and give it permissions what it want at installation stage, and then it may do something we don't like in the background, now with Lavender we can at least prevent from accessing network if we don't trust it.
Both linux desktop and Android Phones are now...
Easy to use tool to block unwanted network access.
The iplock tool is a simple iptables extension that allows you to run iptables commands that otherwise require root access in order to block and unblock IP addresses in your firewall.
This is particularly useful if you have a webserver such as Apache2 running a scripting language such as PHP without root permissions. When you detect that a user is likely a hacker (i.e. tries to access a folder named wp-admin on a non-Wordpress website) then you can use iplock <his-IP-address> to block...
The Kernel Intrusion Detection System-KIDS, is a Network IDS, where the main part, packets grab/string match, is running at kernelspace, with a hook of Netfilter Framework. The project is not ready for use, then incomplete pieces of code may be found.
Nodogsplash offers a simple way to provide restricted access to an internet connection. It is intended for use on wireless access points running OpenWRT (but may also work on other Linux-based devices).
Running as a daemon it monitors /var/log/messages(configurable)
for bastille iptables and PSAD scan alerts with a max threshold (configurable)
It will block ip on iptables instantly and send abuse email out.
Requires a few perl modules (tries to install)
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The library implements generic content inspection protocol API compatible with Sendmail Milter, thus allowing various applications and proxies to use Milter-compatible filters without running sendmail itself. It is here to replace Checkpoint\'s OPSEC/CV
Q5 is a complete fully open linux based router / network appliance, including hardware. It supports up to four wireless minipci cards and two 10/100 Mbps NICs. The hardware is build around AMD's AU1500 MIPS processor, running at 264 MHz.
RTelnet is a reverse Telnet, it's increadably useful to get behind firewalls and NAT's or routers running ip masqurading.
very useful for remotely admin someones PC remotely when they don't know how to do anything like opening their firewall.
The doorman guards the door of a server, manipulating firewall rules to admit only recognized parties.
Allows Silent Running - a server with all ports CLOSED.
Linux-BSD-OSX server & client; C source & docs + Windows client binary. GPL.
Enable servers behind a firewall to export services to the external networks with the assistance from an externel host as proxy (Jumppoint). The firewall tunnel consists of two parts: a frontend as "Jumppoint" and a backend running behind the firewall
Remote Packet Filter Control Daemon allows remote control and monitoring of OpenBSD's packet filter. It communicates with clients using RPFC protocol running on top of SSL (Secure Socket Layer).
Krome Shield is designed to fool remote fingerprinting tools (using ICMP & TCP), making them think you're running a different OS. It runs under Linux, using the netlink device and ipchains. In the future it will act like an IDS too, detecting attacks a
Sky-Fire is a secure, easy-to-use Linux firewall. It is a dynamic script that supports forwarding to two different subnets and running servers on the firewall. The script is designed to be as user friendly as possible. It includes a setup script for quic
NetgearDG tools is a collection of command line utilities to administer Netgear routers running DGTeam firmware. Currently the only supported router is the Netgear DG834GT.