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crowdsec
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hub
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Self hosted security recommendations
I use their free plan so I can't tell about any other plan. In order to protect all your services, you just have to deploy Crowdsec once, give it access to the logs of all your existing services and set up the relevant bouncers (reverse proxy and probably Cloudflare). You must also give it the relevant collections from https://hub.crowdsec.net/ such as https://hub.crowdsec.net/author/crowdsecurity/collections/nextcloud
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Two questions re Crowdsec
Doesn't work adding it to acquis.yaml. Crowdsec fails to start. If I go to hub.crowdsec.net there are multiple predefined collections, many of which define an acquisition script but don't say where to put it.
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Block Illegal Users
The ssh-bf scenario:
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Can CrowdSec protect a mail server ?
We don't have support for them yet, however, if you provide log samples and open an issue with the samples on https://github.com/crowdsecurity/hub. We can work on supporting them.
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Crowdsec Acquis.yml help
You find the required contents of the acquis.yaml on the dedicated page of each collection on the hub.
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Security hardening Caddy (docker)
This isn't usable in latest Caddy versions unfortunately. See https://github.com/crowdsecurity/hub/pull/433
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Plex and Exchange 2019
I have news. There's a PR for Exchange support. I don't have an ETA for it to be merged, though.
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Logging unauthorised attempts
I just submitted a PR for Wireguard support. Feel free to try it out. I haven't been able to test it much. And yes, it's my first PR :-)
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Integrating Sysmon events with Crowdsec
Your use case sounds cool. Unfortunately CrowdSec is not very mature on Windows (yet). That being said we have just written a parser for sysmon. It's very much WIP and needs testing. Also there's not any scenarios yet so CrowdSec can't detect anything there yet. That being said we would love to collaborate with you on creating them if you're willing to invest time in it too. A good place to do that would be via our Discord (invite link under the subreddit description) where I will be happy to set up a dedicated channel where you can have direct access to our devs.
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How to list the applications that crowdsec is monitoring?
Thanks for joining and asking questions :-) sudo cscli metrics gives you an overview of which log sources is being parsed and which attacks has been detected. You add a custom application by creating a parser and scenario or downloading a collection from the hub and adding a suitable data source.
crowdsec
- Disable notifications for one out of several machines
- 9. 为你的公网服务部署入侵检测
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Brute.Fail Watch brute force attacks in real time
Hey we actually built the second part as a product. Its a modern revamp of fail2ban combined with crowdsourcing aspect to deliver an up-to-date blocklist of active threats. You can check it out at https://github.com/crowdsecurity/crowdsec
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CrowdSec Engine 1.5 is officially here 🚀
Today we are pleased to announce the launch of CrowdSec Engine 1.5 - this is a huge milestone for the project and one that would not have been possible without the help of this community. You can read see the full change log over on GitHub here https://github.com/crowdsecurity/crowdsec/releases
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Crowdsec on OpenSUSE tumbleweed
wget https://github.com/crowdsecurity/crowdsec/releases/latest/download/crowdsec-release.tgz server:> tar xzvf crowdsec-release.tgz https://github.com/crowdsecurity/crowdsec/releases/latest/download/crowdsec-release.tgz server: > tar xzvf crowdsec-release.tgz server:> cd crowdsec-v* && sudo ./wizard.sh -i
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Did you have serious attacks on your exposed services before?
This tool crowdsec.net is really interesting to mitigate and enact defense systems for different scenarios.
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Feature Request: CrowdSec
CrowdSec is licensed under MIT open source license, you can find a copy of the text here: “Copyright 2020, CrowdSec SAS (http://crowdsec.net), Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.” That’s all there is to it. Like in the case of Debian, you can do anything you want with it, for free, period. You just need to embed this license when you redistribute the product.
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What service can I use to ban users?
You should check out https://crowdsec.net. More advanced, uses crowdsources cti to block attacks even before they happen. Also both nginx and captcha is supported. Disclaimer: I am head of community. Visit /r/CrowdSec or our Discord at https://discord.gg/crowdsec if you have questions :-)
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Hardening exposed WireGuard ports
Do I need something like crowdsec, or is WireGuard secure enough on its own?
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A 'leech-like' connection constantly established on my server
Before falling too much in love with Fail2Ban try taking a look at https://crowdsec.net. Similar functionality but way more advanced (but easier to configure). New project that leverages the power of the crowd and shares information of attacks among users so they help each other out protecting themselves.
What are some alternatives?
ModSecurity - ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx that is developed by Trustwave's SpiderLabs. It has a robust event-based programming language which provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis. With over 10,000 deployments world-wide, ModSecurity is the most widely deployed WAF in existence.
Fail2Ban - Daemon to ban hosts that cause multiple authentication errors
whalewall - Automate management of firewall rules for Docker containers
Wazuh - Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.
pfSense - Main repository for pfSense
Suricata - Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine developed by the OISF and the Suricata community.
Nginx Proxy Manager - Docker container for managing Nginx proxy hosts with a simple, powerful interface
docker-pi-hole - Pi-hole in a docker container
Snort - Snort++
ansible-collection-hardening - This Ansible collection provides battle tested hardening for Linux, SSH, nginx, MySQL
OSSEC - OSSEC is an Open Source Host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.