Networks and computers that open to the public are facing hacker attacks from all over the world every day. Once we are compromised, we would be one of the cyber crime victims. Our tasty Almond Croissants is a high performance and ultra-low latency Intrusion Detection and Prevention System (IDPS). Unlike well known and famous brands for large business enterprises in the market, Almond Croissants is available free of charge that everyone can afford. It is ideal for home, Small Office Home Office (SOHO) and Small Medium Business (SMB).
Not a Network Security Monitoring (NSM) or Information Security (InfoSec) expert? No problem! Our Almond Croissants is really a "Plug, Play and Forget" system that we are dreaming of. Don't be the next cyber crime victims, try Almond Croissants now!
- Block ports and vulnerabilities scanning
- Block known exploitation on vulnerable systems
- Block known malicious IP addresses to access your systems
- Block known source of Secure Shell (SSH) brute forcing
- Block The Onion Router (TOR) to access your systems
- Prevent from accessing known malicious sites with Secure Sockets Layer (SSL) certificates
- Prevent from being infected by known virus and malware
- Block known annoying advertising servers
- Easy and straight forward analysis with charts on web interfaces
- Compatible with Bittorrent and 4K video streaming
- Ultra-low latency for online gaming
- Compatible with Windows, Linux, macOS, Apple iOS and Android
- Ultra-low latency throughput that drives your network to a limit
- No subscription fee
- More protection for web servers @
- More protection from known malware @
- Block known phishing sites @
- Automatically update and upgrade @
- Plug, Play and Forget!
@ only available in Almond Croissants
Almond Croissants is an Open Source Project which is released under GPLv3 License and it is developed by Samiux.
Please keep in mind that Almond Croissants is available FREE OF CHARGE.
** A little history about Croissants and Almond Croissants. Croissants was developed since 2012 and it was modified a lot in 2016. The project was renamed to Almond Croissants since then.
If you like our project, please show your support by sending the fund to Paypal to (infosecninjas AT gmail DOT com) in USD or HKD currency. You need a Paypal account to do so.
- Intel i5-6500T (Quad Core) CPU
- 32GB DDR4 RAM
- 320GB Hard Drive or SSD
- 3 Intel Network Interfaces Cards/Ports
* The higher performance of CPU, the higher performance of Almond Croissants
* Almond Croissants should be installed on a dedicated Ubuntu Server box and it should be placed between modem (if any) and router (if any).
* Memory Calculator -- About 4 GB RAM per CPU Thread for Almond Croissants.
Examples for home usage : Intel Atom C2750 CPU with 32GB RAM can handle up to 500Mbps internet connection while Intel i5-6500T CPU with 32GB RAM can handle 1000Mbps or up connection.
The following are new motherboards with Xeon E3-1500 v5 Series Processors that ideal for Home, SOHO and Small Medium Businesses users :
WARNING : Make sure ports 5601, 19999 and 9771 are not opened to the pubic.
To monitor and analysis the traffic of the network.
Meanwhile, you also need to download the preset dashboard and import to Kibana. You can download here. Kibana is big data analysis tool. The indices can be deleted and re-created for new analysis and monitoring.
The first time setup for Kibana is as this video :
To monitor the performance of Almond Croissants.
To analysis the packet capture.
2.4 Rules Management
If you want to disable some rules as they are false positive, you can edit the "disablesid.conf" of pulledpork.
sudo nano /etc/pulledpork/disablesid.conf
If you want to drop some traffic, you can edit the "dropsid.conf" of pulledpork.
sudo nano /etc/pulledpork/dropsid.conf
If you want to modify some traffic, you can edit the "modifysid.conf" of pulledpork.
sudo nano /etc/pulledpork/modifysid.conf
After updated the pulledpork, you should run the following command to make the changes effective.
Another monitoring tool for the performance of Almond Croissants.
3.0 Hall of Fame
Nathan Paquin - Unix System Expert (IRC nick : sys)
Omnish - Gamer with InfoSec in mind (IRC nick : omnish)
Alpharyon - Ultra speed internet user with InfoSec in mind
*** Special thanks to Nathan Paquin (sys) to provide server for rules updates ***
If you cannot access internet when you behind the Almond Croissants, Suricata may be down unexpectedly. You can check if it is running or not by the following command :
sudo ps aux | grep suricata
If it is not running, you can issue the following command to start it :
You can check the suricata.log at /var/log/suricata/suricata.log.
There are kernel drops and/or memory drops in the system. How to avoid it?
High CPU loading (says 80-100%) and/or insufficient memory will cause kernel and/or memory drops. You are required to use a higher power CPU and/or increase the amount of memory to solve the problem. Meanwhile, too low "RING_SIZE" value may also causing the problem.
Can I use 16GB RAM for the system?
We have tested Intel Celeron N3150 with 16GB RAM and it is running smoothly. However, make sure NOT to set the value of "RING_SIZE" in "nsm.conf" larger than "400000". The total number of users for N3150 with 16GB RAM is not more than 4 and the bandwidth that it can handle is about 200 to 250 Mbps. We also tested Intel Atom D2550 but the performance is not acceptable. In general speaking, about 4GB RAM per CPU thread and make sure the CPU power is not too weak. Meanwhile, total number of users should be also put into account. Celeron N3150 with 16GB RAM can only serve up to 4 concurrency users with no high demanding tasks.
sudo nano /etc/croissants/conf.d/nsm.conf
After changing the value of "RING_SIZE" (default is 200000) at "nsm.conf", you can run the following command for testing the suitable value of "RING_SIZE" : sudo /etc/croissants/conf.d/auto_config
What is the function of the third network interface?
One is for incoming traffic (from modem or ISP) and the other is for outgoing traffic (to router). The third one is connected to the switch for management purpose. It is also used for updating the rules and system.
How to check what network interfaces are in my box? ls /sys/class/net
What is the recommended value for "RING_SIZE"?
We recommend the value of "RING_SIZE" to be 400000 or higher and it depends on how many memory you have. For 4 CPU threads and 16GB RAM box, 400000 is the most suitable and recommended value. For 8 CPU threads and 32GB RAM box, 400000 is also the most suitable and recommended value.
Where to change the Heap Size of JAVA for Elasticsearch? sudo nano /etc/default/elasticsearch
sudo systemctl restart elasticsearch
Can I use Almond Croissants as an Intrusion Detection System only?
Yes. You need to have two network interfaces. One is for connecting to the SPAN Port (or Port Mirroring) at the Managed Switch. The other is for management purpose. In addition, all the "Drop" and "Reject" rules are not blocking the traffic. The pie chart on Kibana that showing "Block" can be ignored as it just showing the rules are triggered. It will monitoring the internal traffic of the network.
The workload of the Almond Croissants at SPAN Port is much higher than placing it in front of router. The hardware should suit for the internal bandwidth ability.