About Portspoof
The Portspoof program's primary goal is to enhance your system's security through a set of new camouflage techniques. As a result of applying them, your attackers' port scan results will become entirely mangled and, to a very significant extent, meaningless.
Techniques Used to Achieve This:
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All configured TCP ports are always open
Instead of informing an attacker that a particular port is in a CLOSED or FILTERED state, a system running Portspoof will return SYN+ACK for every connection attempt.
Result: It is impractical to use stealth (SYN, ACK, etc.) port scanning against your system, since all ports are always reported as OPEN. With this approach, it is really difficult to determine if valid software is listening on a particular port (check out the screenshots).
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Every open TCP port emulates valid services
Portspoof has a huge dynamic service signature database that will be used to generate responses to your offenders' scanning software service probes.
Scanning software usually tries to determine a service that is running on an open port. This step is mandatory if one would want to identify port numbers on which you are running your services on a system behind Portspoof. For this reason, Portspoof will respond to every service probe with a valid service signature that is dynamically generated based on a service signature regular expression database.
Result: An attacker will not be able to determine which port numbers your system is truly using.
Reverse Exploitation with Portspoof
Portspoof can be used as an 'Exploitation Framework Frontend' that turns your system into a responsive and aggressive machine. In practice, this usually means exploiting your attackers' tools and exploits.
At the moment, there are several example exploits in the configuration file (portspoof.conf). One of them exploits Nmap 6.25 default script.
Overview
Portspoof is meant to be a lightweight, fast, portable, and secure addition to any firewall system or security system. The general goal of the program is to make the reconnaissance phase slow and bothersome for your attackers as much as possible. This is quite a change from the standard 5-second Nmap scan that will give a full view of your system's running services.
By using all of the above-mentioned techniques together:
- Your attackers will have a tough time trying to identify all of your listening services.
- The only way to determine if a service is emulated is through a protocol probe (imagine probing protocols for 65k open ports!).
- It takes more than 8 hours and 200MB of sent data to get all of the service banners for your system (
nmap -sV -p -equivalent).
Enterprise Solution
Need production-ready active defense at scale? Portspoof Pro delivers enterprise-grade deception with centralized management, SIEM integration, and advanced threat intelligence—designed for networks that demand the highest level of security.
Screenshots
Nmap port scan results for TCP ports 1:65353 (only one service is real):
Videos
Nmap scan against system protected by Portspoof:
Exploiting your attackers automated exploit scripts with Portspoof:
Exploiting your attackers Nmap NSE script with Portspoof:
Features
The most important features that Portspoof has:
- Portspoof is a userland software and does not require root privileges ! - Binds to just one tcp port per a running instance - Easily customizable through your iptables rules - Marginal CPU/memory usage (multithreaded) - More than 9000 dynamic service signatures are supported !
Check out the documentation page for further details.License
Portspoof is a free software distributed under GNU GPL version 2 license.
All the relevant details can be found here