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Intelligently block brute-force attacks by aggregating system logs
SSHGuard protects hosts from brute-force attacks against SSH and other services. It aggregates system logs and blocks repeat offenders using several firewall backends, including iptables, ipfw, and pf.
Simulating an IP packet traversing the Linux kernel.
lpt simulates an IP packet traversing the Linux kernel and prints out
what happens as it progresses through the security features of the
kernel and quickly determine wether or not the packet will pass.
Net-Policy is a highly-scalable, role-and-policy based network management system. Net-Policy aims to be an easy-to-use, full-fledged management station capable of configuration, monitoring, and notification collection and aggregation via the use of SNMP
DAXFi is a Python package that helps configure several different kinds of firewalls in a consistent way. The rules are described in XML. It comes with a Python package, useful to build other applications and includes some useful example programs.
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Secwatch is an intrusion detection system using log analysis to detect service scan and other brute-force attempts on a server or other computer using system logs and will create temporary firewall rules to block offending IPs
TuxGuardian is an application-based firewall with a graphical interface. It's main task is to control and forbid transmission & reception of data by unauthorized applications; it can be thought as the Linux equivalent to apps such as ZoneAlarm and Kerio
LogCop is a set of turn-key bash/firewall/awk scripts for enhancing an IDS. It monitors system logs and blocks IP addresses based on such criteria as illegal user names from repeated attacks. In production under Linux, FreeBSD, OS X, Solaris.
Simple-to-use, dynamic, rule-based firewall addition. Uses QUEUE/userspace to dynamically approve or drop packets based on custom rules. With frequency caching, friend/foe indication, loose IP matching, and customizable logging.
Packet Auth. Sniffer (or Sequence) Allows you to set on your server this little daemon (pasmal) monitoring tcp/ip & icmp, and on the exact good sequence (the one you only know) run processes (a firewall) - such as access list update, iptables,ipchains.
XSServer is a system, which is intented to be an easy way to configure dhcp, iptables and squid in order to make possible to have those working together at once, generating the needed config files for each.
The goal of FireStarter is to provide easy to use, yet powerful, graphical tools for setting up, administrating and monitoring firewalls for Linux machines.
Fwpass is a daemon that executes commands in response to specific sequence of incoming IP packets. It does not use TCP/IP sockets but relies on ULOG functionality of Netfilter (Linux kernel built in firewall).
Security proxy to clean up all unallowed constructions from HTTP requests, detect intruders and filter outgoing HTTP traffic against leaking classified data.
IPFC is a distributed management solution for security module (firewall, nids). Security module can be packet-filtering (ipfw,netfilter,ipf ...), NIDS or any other servers (syslog...) or embedded devices.
OpenISP: A suite of ISP Management Software (GPL licensed.) mysqlBind, mysqlApache, mysqlRadius, mysqlSendmail, mysqlISP, mysqlRadacct, mysqlIPM and others. NOTICE: Moved to freshmeat.net and www.openisp.net. For third party wrappers: unixservice.com
The Hackers Lab is aimed to provide hackers, system audits, system and server and network administrators with applications to secure their own servers.