Learn more about Stack Overflow the company, and our products. When users repeatedly fail to authenticate to a service (or engage in other suspicious activity), fail2ban can issue a temporary bans on the offending IP address by dynamically modifying the running firewall policy. WebThe fail2ban service is useful for protecting login entry points. If youd like to learn more about fail2ban, check out the following links: Thanks for learning with the DigitalOcean Community. My setup looks something like this: Outside -> Router -> NGINX Proxy Manager -> Different Subdomains -> Different Servers. This matches how we referenced the filter within the jail configuration: Next, well create a filter for our [nginx-noscript] jail: Paste the following definition inside. It's the configuration of it that would be hard for the average joe. The number of distinct words in a sentence. I've been hoping to use fail2ban with my npm docker compose set-up. sendername = Fail2Ban-Alert Ask Question. Or can put SSL certificates on your web server and still hide traffic from them even if they are the proxy? Thanks @hugalafutro. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The key defined by the proxy_cache_key directive usually consists of embedded variables (the default key, $scheme$proxy_host$request_uri, has three variables). Depending on how proxy is configured, Internet traffic may appear to the web server as originating from the proxys IP address, instead of the visitors IP address. This textbox defaults to using Markdown to format your answer. This is important - reloading ensures that changes made to the deny.conf file are recognized. When i used this command: sudo iptables -S some Ips also showed in the end, what does that means? Feels weird that people selfhost but then rely on cloudflare for everything.. Who says that we can't do stuff without Cloudflare? I'm not all that technical so perhaps someone else can confirm whether this actually works for npm. Thanks. real_ip_header CF-Connecting-IP; hope this can be useful. That way you don't end up blocking cloudflare. LEM current transducer 2.5 V internal reference, Book about a good dark lord, think "not Sauron". So why not make the failregex scan al log files including fallback*.log only for Client.. How would fail2ban work on a reverse proxy server? I just cobbled the fail2ban "integration" together from various tutorials, with zero understanding of iptables or docker networking etc. [PARTIALLY SOLVED, YOU REFER TO THE MAPPED FOLDERS] my logs make by npm are all in in a logs folder (no log, logS), and has the following pattern: /logs/proxy-host-*.log and also fallback*.log; [UPDATE, PARTIALLY SOLVED] the regex seems to work, files proxy* contain: Yes this is just relative path of the npm logs you mount read-only into the fail2ban container, you have to adjust accordingly to your path. Use the "Hosts " menu to add your proxy hosts. But are you really worth to be hacked by nation state? https://www.fail2ban.org/wiki/index.php/Main_Page, https://forums.unraid.net/topic/76460-support-djoss-nginx-proxy-manager/, https://github.com/crazy-max/docker-fail2ban, https://www.the-lazy-dev.com/en/install-fail2ban-with-docker/, "iptables: No chain/target/match by that name", fail2ban with docker(host mode networking) is making iptables entry but not stopping connections, Malware Sites access from Nginx Proxy Manager, https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html, https://www.home-assistant.io/integrations/http/#trusted_proxies, in /etc/docker/daemon.json - you need to add option "iptables": true, you need to be sure docker create chain in iptables DOCKER-USER, for fail2ban ( docker port ) use SINGLE PORT ONLY - custom. Just need to understand if fallback file are useful. For example, my nextcloud instance loads /index.php/login. The only workaround I know for nginx to handle this is to work on tcp level. I get about twice the amount of bans on my cloud based mailcow mail server, along the bans that mailcow itself facilitates for failed mail logins. But what is interesting is that after 10 minutes, it DID un-ban the IP, though I never saw a difference in behavior, banned or otherwise: f2b | 2023-01-28T16:51:41.122149261Z 2023-01-28 11:51:41,121 fail2ban.actions [1]: NOTICE [npm-general-forceful-browsing] Unban 75.225.129.88. I've got a few things running behind nginx proxy manager and they all work because the basic http (s)://IP:port request locally auto loads the desired location. After this fix was implemented, the DoS stayed away for ever. Check the packet against another chain. It is ideal to set this to a long enough time to be disruptive to a malicious actors efforts, while short enough to allow legitimate users to rectify mistakes. I'd suggest blocking up ranges for china/Russia/India/ and Brazil. Regarding Cloudflare v4 API you have to troubleshoot. How to increase the number of CPUs in my computer? Im at a loss how anyone even considers, much less use Cloudflare tunnels. I think I have an issue. https://www.reddit.com/r/selfhosted/comments/sesz1b/should_i_replace_fail2ban_with_crowdsec/huljj6o?utm_medium=android_app&utm_source=share&context=3. Create a file called "nginx-docker" in /etc/fail2ban/filder.d with the following contents, This will jail all requests that return a 4xx/3xx code on the main ip or a 400 on the specified hosts in the docker (no 300 here because of redirects used to force HTTPS). Ive tried to find These will be found under the [DEFAULT] section within the file. Were not getting into any of the more advanced iptables stuff, were just doing standard filtering. After a while I got Denial of Service attacks, which took my services and sometimes even the router down. An action is usually simple. There's talk about security, but I've worked for multi million dollar companies with massive amounts of sensitive customer data, used by government agencies and never once have we been hacked or had any suspicious attempts to gain access. Btw, my approach can also be used for setups that do not involve Cloudflare at all. In NPM Edit Proxy Host added the following for real IP behind Cloudflare in Custom Nginx Configuration: In production I need to have security, back ups, and disaster recovery. I love the proxy manager's interface and ease of use, and would like to use it together with a authentication service. Would also love to see fail2ban, or in the meantime, if anyone has been able to get it working manually and can share their setup/script. I switched away from that docker container actually simply because it wasn't up-to-date enough for me. If I test I get no hits. Every rule in the chain is checked from top to bottom, and when one matches, its applied. Fail2ban does not update the iptables. The steps outlined here make many assumptions about both your operating environment and your understanding of the Linux OS and services running on Linux. For most people on here that use Cloudflare it's simply a convenience that offers a lot of functionality for free at the cost of them potentially collecting any data that you send through it. How would fail2ban work on a reverse proxy server? I agree than Nginx Proxy Manager is one of the potential users of fail2ban. Once these are set, run the docker compose and check if the container is up and running or not. Your blog post seems exactly what I'm looking for, but I'm not sure what to do about this little piece: If you are using Cloudflare proxy, ensure that your setup only accepts requests coming from the Cloudflare CDN network by whitelisting Cloudflare's IPv4 and IPv6 addresses on your server for TCP/80 (HTTP) and TCP/443 (HTTPS). Sign in Asked 4 months ago. Indeed, and a big single point of failure. Hello, thanks for this article! I'm assuming this should be adjusted relative to the specific location of the NPM folder? This will let you block connections before they hit your self hosted services. Why are non-Western countries siding with China in the UN? However, by default, its not without its drawbacks: Fail2Ban uses iptables UsingRegex: ^.+" (4\d\d|3\d\d) (\d\d\d|\d) .+$ ^.+ 4\d\d \d\d\d - .+ \[Client \] \[Length .+\] ".+" .+$, [20/Jan/2022:19:19:45 +0000] - - 404 - GET https somesite.ca "/wp-login.php" [Client 8.8.8.8] [Length 172] [Gzip 3.21] [Sent-to somesite] "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36" "-", DISREGARD It Works just fine! if you name your file instead of npm-docker.local to haha-hehe-hihi.local, you need to put filter=haha-hehe-hihi instead of filter=npm-docker etc. Then I added a new Proxy Host to Nginx Proxy Manager with the following configuration: Details: Domain Name: (something) Scheme: http IP: 192.168.123.123 Port: 8080 Cache Assets: disabled Block Common Exploits: enabled Websockets Support: enabled Access List: Publicly Accessible SSL: Force SSL: enabled HSTS Enabled: enabled HTTP/2 Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Setting up fail2ban is also a bit more advanced then firing up the nginx-proxy-manager container and using a UI to easily configure subdomains. I suppose you could run nginx with fail2ban and fwd to nginx proxy manager but sounds inefficient. I agree than Nginx Proxy Manager is one of the potential users of fail2ban. https://github.com/clems4ever/authelia, BTW your software is being a total sucess here https://forums.unraid.net/topic/76460-support-djoss-nginx-proxy-manager/. The value of the header will be set to the visitors IP address. Depends. Forgot to mention, i googled those Ips they was all from china, are those the attackers who are inside my server? And now, even with a reverse proxy in place, Fail2Ban is still effective. I'm very new to fail2ban need advise from y'all. Yes! Having f2b inside the npm container and pre-configured, similiar to the linuxio container, gives end users without experience in building jails and filters an extra layer of security. Is there a (manual) way to use Nginx-proxy-manager reverse proxies in combination with Authelia 2FA? Sign in To remove mod_cloudflare, you should comment out the Apache config line that loads mod_cloudflare. However, fail2ban provides a great deal of flexibility to construct policies that will suit your specific security needs. This container runs with special permissions NET_ADMIN and NET_RAW and runs in host network mode by default. According to https://www.home-assistant.io/docs/ecosystem/nginx/, it seems that you need to enable WebSocket support. The card will likely have a 0, and the view will be empty, or should, so we need to add a new host. The thing with this is that I use a fairly large amount of reverse-proxying on this network to handle things like TLS termination and just general upper-layer routing. It seemed to work (as in I could see some addresses getting banned), for my configuration, but I'm not technically adept enough to say why it wouldn't for you. 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