Fail2Ban
SpamAssassin
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Fail2Ban | SpamAssassin | |
---|---|---|
49 | 8 | |
10,423 | 276 | |
4.6% | 1.8% | |
8.8 | 8.5 | |
1 day ago | about 17 hours ago | |
Python | Perl | |
GNU General Public License v3.0 or later | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Fail2Ban
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Looking for a way to remote in to K's of raspberry pi's...
now some things you need to think about: - cloud init - this will need to be secure so lock it down hard anything not needed an alternative OS to look at if you have the ability's is https://www.alpinelinux.org/ also as these devices are not that powerfull every extra agent / abstaction layer you add impacts performance need to look at low over head security https://www.crowdsec.net/ and https://github.com/fail2ban/fail2ban (if you call fail2ban security) - using certificates to authenticate ssh login
- Fail2Ban
- Fail2Ban – Daemon to ban hosts that cause multiple authentication errors
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I am (to be) a web designer, how to ensure security on a vps?
See https://github.com/fail2ban/fail2ban for beginner's guide, basically you set it up to monitor logfiles and it would act accordingly (plenty of built-in config to handle various daemons so you don't have to write yourself).
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Home Lab Setup Recommendations
- Nginx & crowdsec/fail2ban if you are exposing your parts (services) to the public ( https://hub.docker.com/r/baudneo/nginx-proxy-manager, https://www.crowdsec.net, https://www.fail2ban.org )
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fail2ban not notifying Cloudflare
— In /etc/fail2ban/action.d/cloudflare.conf I copied the file from https://github.com/fail2ban/fail2ban/blob/master/config/action.d/cloudflare.confand added my ‘cftoken’ and ‘cfuser’ on the bottom
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Firewall rules beyond "deny incoming, enable only the ports that you need"
https://github.com/fail2ban/fail2ban is a mature, easy to set up way to have some dynamic firewall rules that respond to attacks. There are more sophisticated options, but they are probably not worth the return on time investment for you.
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Comments/Suggestions on security-auditing different services
You can create your own regexes for custom services: https://github.com/fail2ban/fail2ban/wiki/Developing-Regex-in-Fail2ban
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Fail2Ban Limitation
Others seem to be (or were) experiencing this too: https://github.com/fail2ban/fail2ban/issues/3100
SpamAssassin
- Apache SpamAssassin 4.0.1 has been released
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Ok, I've migrated email to selfhosted
spamassassin or rspamd or ASSP. All very good. Spamassassin just works, but you need to feed it a good cohort of spam and ham (about 1000 messages each). Most people only send it the spam which will then bias it quite a bit and not have it classify spam as spam unless it's the worst of the bunch. Spamassassin is a filter for your mail server. rspamd is the same idea. ASSP is highly configurable and a proxy.
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I am looking for something like barracuda for a home setup
https://spamassassin.apache.org/ ?
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Using Flask for a personal website - add dynamic component?
I'm currently looking into using a Bayesian spam filter like Bogofilter or Apache Spamassassin to help out. I'd run the contents of my Contact Us form through the filter after the initial validation, and if the contents are below my spam threshold, I would actually send out the contact us request.
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Using xyz TLD domain as a primary email address
Avoid it. Apache's SpameAssassin flags several TLDs including .xyz as 'suspicious' nTLD[1].
[1]: https://github.com/apache/spamassassin/blob/trunk/rulesrc/sa...
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Domain or Dedicated Email account to improve deliverability?
The famous spam filter SpamAssassin. Score: -0.6. A score below -5 is considered spam. -0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid This rule is automatically applied if your email contains a DKIM signature but other positive rules will also be added if your DKIM signature is valid. See immediately below. 0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Great! Your signature is valid 0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain Great! Your signature is valid and it's coming from your domain name 0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.001 HTML_MESSAGE HTML included in message No worry, that's expected if you send HTML emails 0.001 RCVD_IN_MSPIKE_H2 Average reputation (+2) 23.83.209.151 listed in wl.mailspike.net -0.001 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.001 SPF_PASS SPF: sender matches SPF record Great! Your SPF is valid -0.01 T_KAM_HTML_FONT_INVALID Test for Invalidly Named or Formatted Colors in HTML -0.644 URIBL_SBL Contains an URL listed in the SBL blocklist -0.1 URIBL_SBL_A Contains URL\'s A record listed in the SBL blocklist
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Spamassassin Untrustworthy TLDs
Maybe you updated spamassassin in the process? Because it looks like they have a list of "spammy TLDs" and .site is in it.
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Why Your Emails May Be Bouncing Back & What You Can Do About It
To detect whether incoming emails are malicious, mail servers also use spam scanners, such as Apache's popular SpamAssasin. The internal workings of these spam scanners can be somewhat complicated (involving Naive Bayes Classifiers on trained, large datasets, for the curious), but the primary takeaway is that these classification systems typically assign a numerical point value to an incoming email to determine the validity of the message. The higher the score, the more likely that the email is spam. For reference, the ISP Optimum states the following regarding their spam filtering:
What are some alternatives?
crowdsec - CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.
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.
Pen Test Tools - Homebrew Tap - Pen Test Tools
Snort - Snort++
spamscanner - Spam Scanner is a Node.js anti-spam, email filtering, and phishing prevention tool and service. Built for @ladjs, @forwardemail, @cabinjs, @breejs, and @lassjs.
Denyhosts - Automated host blocking from SSH brute force attacks
Blackbox - Safely store secrets in Git/Mercurial/Subversion
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.