Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? What command did you issue, I'm assuming, from within the f2b container itself? So now there is the final question what wheighs more. I just wrote up my fix on this stackoverflow answer, and itd be great if you could update that section section of your article to help people that are still finding it useful (like I did) all these years later. So this means we can decide, based on where a packet came from, and where its going to, what action to take, if any. sender = fail2ban@localhost, setup postfix as per here: Ultimately, it is still Cloudflare that does not block everything imo. Would be great to have fail2ban built in like the linuxserver/letsencrypt Docker container! This is important - reloading ensures that changes made to the deny.conf file are recognized. Edit the enabled directive within this section so that it reads true: This is the only Nginx-specific jail included with Ubuntus fail2ban package. I love the proxy manager's interface and ease of use, and would like to use it together with a authentication service. This tells Nginx to grab the IP address from the X-Forwarded-For header when it comes from the IP address specified in the set_real_ip_from value. Im at a loss how anyone even considers, much less use Cloudflare tunnels. The best answers are voted up and rise to the top, Not the answer you're looking for? Scheme: http or https protocol that you want your app to respond. To change this behavior, use the option forwardfor directive. But are you really worth to be hacked by nation state? To do so, you will have to first set up an MTA on your server so that it can send out email. But is the regex in the filter.d/npm-docker.conf good for this? privacy statement. In my opinion, no one can protect against nation state actors or big companies that may allied with those agencies. sendername = Fail2Ban-Alert My hardware is Raspberry Pi 4b with 4gb using as NAS with OMV, Emby, NPM reverse Proxy, Duckdns, Fail2Ban. actionban = iptables -I DOCKER-USER -s -j DROP, actionunban = iptables -D DOCKER-USER -s -j DROP, Actually below the above to be correct after seeing https://docs.rackspace.com/support/how-to/block-an-ip-address-on-a-Linux-server/. You can see all of your enabled jails by using the fail2ban-client command: You should see a list of all of the jails you enabled: You can look at iptables to see that fail2ban has modified your firewall rules to create a framework for banning clients. I then created a separate instance of the f2b container following your instructions, which also seem to work (at least so far). Requests coming from the Internet will hit the proxy server (HAProxy), which analyzes the request and forwards it on to the appropriate server (Nginx). To influence multiple hosts, you need to write your own actions. Is there any chance of getting fail2ban baked in to this? This worked for about 1 day. Maybe drop into the Fail2ban container and validate that the logs are present at /var/log/npm. if you have all local networks excluded and use a VPN for access. With both of those features added i think this solution would be ready for smb production environments. so even in your example above, NPM could still be the primary and only directly exposed service! For instance, for the Nginx authentication prompt, you can give incorrect credentials a number of times. Dashboard View WebFail2Ban is a wonderful tool for managing failed authentication or usage attempts for anything public facing. Yep. Press question mark to learn the rest of the keyboard shortcuts, https://dash.cloudflare.com/profile/api-tokens. My understanding is that this result means my firewall is not configured correctly, but I wanted to confirm from someone who actually knows what they are doing. We will use an Ubuntu 14.04 server. I guess fail2ban will never be implemented :(. However, any publicly accessible password prompt is likely to attract brute force attempts from malicious users and bots. To make modifications, we need to copy this file to /etc/fail2ban/jail.local. as in example? Anyone who wants f2b can take my docker image and build a new one with f2b installed. You'll also need to look up how to block http/https connections based on a set of ip addresses. Sure, its using SSH keys, but its using the keys of another host, meaning if you compromise root on one system then you get immediate root access over SSH to the other. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. @vrelk Upstream SSL hosts support is done, in the next version I'll release today. Or save yourself the headache and use cloudflare to block ips there. 100 % agree - > On the other hand, f2b is easy to add to the docker container. Looking at the logs, it makes sense, because my public IP is now what NPM is using to make the decision, and that's not a Cloudflare IP. And those of us with that experience can easily tweak f2b to our liking. Very informative and clear. They can and will hack you no matter whether you use Cloudflare or not. Otherwise, anyone that knows your WAN IP, can just directly communicate with your server and bypass Cloudflare. However, by default, its not without its drawbacks: Fail2Ban uses iptables to manage its bans, inserting a --reject-with icmp-port-unreachable rule for each banned host. Now that NginX Proxy Manager is up and running, let's setup a site. 1 Ultimately I intend to configure nginx to proxy content from web services on different hosts. We do not host any of the videos or images on our servers. 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. This one mixes too many things together. Even with no previous firewall rules, you would now have a framework enabled that allows fail2ban to selectively ban clients by adding them to purpose-built chains: If you want to see the details of the bans being enforced by any one jail, it is probably easier to use the fail2ban-client again: It is important to test your fail2ban policies to ensure they block traffic as expected. Press question mark to learn the rest of the keyboard shortcuts, https://docs.rackspace.com/support/how-to/block-an-ip-address-on-a-Linux-server/. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? At what point of what we watch as the MCU movies the branching started? Asked 4 months ago. Lol. Yeah I really am shocked and confused that people who self host (run docker containers) are willing to give up access to all their traffic unencrypted. Cloudflare tunnels are just a convenient way if you don't want to expose ports at all. If you are using volumes and backing them up nightly you can easily move your npm container or rebuild it if necessary. Today weve seen the top 5 causes for this error, and how to fix it. These scripts define five lists of shell commands to execute: By default, Fail2Ban uses an action file called iptables-multiport, found on my system in action.d/iptables-multiport.conf. In production I need to have security, back ups, and disaster recovery. To properly block offenders, configure the proxy and Nginx to pass and receive the visitors IP address. Using Fail2ban behind a proxy requires additional configuration to block the IP address of offenders. Begin by changing to the filters directory: We actually want to start by adjusting the pre-supplied Nginx authentication filter to match an additional failed login log pattern. The typical Internet bots probing your stuff and a few threat actors that actively search for weak spots. Fail2ban is a daemon to ban hosts that cause multiple authentication errors.. Install/Setup. Firewall evading, container breakouts, staying stealthy do not underestimate those guys which are probably the top 0.1% of hackers. Complete solution for websites hosting. Your tutorial was great! However, by default, its not without its drawbacks: Fail2Ban uses iptables People really need to learn to do stuff without cloudflare. Why are non-Western countries siding with China in the UN? Or the one guy just randomly DoS'ing your server for the lulz. I know there is already an option to "block common exploirts" but I'm not sure what that actually does, and fail2ban is quite a robust way of dealing with attacks. 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). --The same result happens if I comment out the line "logpath - /var/log/npm/*.log". How would fail2ban work on a reverse proxy server? Anyone reading this in the future, the reference to "/action.d/action-ban-docker-forceful-browsing" is supposed to be a .conf file, i.e. filter=npm-docker must be specified otherwise the filter is not applied, in my tests my ip is always found and then banned even for no reason. Big question: How do I set this up correctly that I can't access my Webservices anymore when my IP is banned? This was something I neglected when quickly activating Cloudflare. @dariusateik the other side of docker containers is to make deployment easy. If npm will have it - why not; but i am using crazymax/fail2ban for this; more complexing docker, more possible mistakes; configs, etc; how will be or f2b integrated - should decide jc21. My switch was from the jlesage fork to yours. #, action = proxy-iptables[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"], iptables-multiport[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"], Fail2Ban Behind a Reverse Proxy: The Almost-Correct Way, A Professional Amateur Develops Color Film, Reject or drop the packet, maybe with extra options for how. The card will likely have a 0, and the view will be empty, or should, so we need to add a new host. Description. ! This account should be configured with sudo privileges in order to issue administrative commands. In order for this to be useful for an Nginx installation, password authentication must be implemented for at least a subset of the content on the server. Welcome to your friendly /r/homelab, where techies and sysadmin from everywhere are welcome to share their labs, projects, builds, etc. Https encrypted traffic too I would say, right? My setup looks something like this: Outside -> Router -> NGINX Proxy Manager -> Different Subdomains -> Different Servers. When started, create an additional chain off the jail name. By default, Nginx is configured to start automatically when the server boots/reboots. I confirmed the fail2ban in docker is working by repeatedly logging in with bad ssh password and that got banned correctly and I was unable to ssh from that host for configured period. The default action (called action_) is to simply ban the IP address from the port in question. Forgot to mention, i googled those Ips they was all from china, are those the attackers who are inside my server? I suppose you could run nginx with fail2ban and fwd to nginx proxy manager but sounds inefficient. Premium CPU-Optimized Droplets are now available. It works for me also. I also added a deny rule in nginx conf to deny the Chinese IP and a GeoIP restriction, but I still have these noproxy bans. Just for a little background if youre not aware, iptables is a utility for running packet filtering and NAT on Linux. Open the file for editing: Below the failregex specification, add an additional pattern. Hi, sorry me if I dont understand:( I've tried to add the config file outside the container, fail2ban is running but seems to not catch the bad ip, i've tried your rules with fail2ban-regex too but I noted: SUMMARY: it works, using the suggested config outside the container, on the host. It works for me also. Modified 4 months ago. -X f2b- I have a question about @mastan30 solution: fail2ban-docker requires that fail2ban itself has to (or must not) be installed on the host machine (dont think, iti is in the container)? Use the "Global API Key" available from https://dash.cloudflare.com/profile/api-tokens. "/action.d/action-ban-docker-forceful-browsing.conf" - took me some time before I realized it. nice tutorial but despite following almost everything my fail2ban status is different then the one is give in this tutorial as example. However, we can create our own jails to add additional functionality. Any guesses? For that, you need to know that iptables is defined by executing a list of rules, called a chain. So, is there a way to setup and detect failed login attemps of my webservices from my proxy server and if so, do youve got a hint? Were not getting into any of the more advanced iptables stuff, were just doing standard filtering. wessel145 - I have played with the same problem ( docker ip block ) few days :) finally I have working solution; actionstop = -D DOCKER-USER -p -m conntrack --ctorigdstport --ctdir ORIGINAL -j f2b- Fail2ban is a daemon to ban hosts that cause multiple authentication errors.. Install/Setup. The text was updated successfully, but these errors were encountered: I think that this kind of functionality would be better served by a separate container. I do not want to comment on others instructions as the ones I posted are the only ones that ever worked for me. I'd suggest blocking up ranges for china/Russia/India/ and Brazil. The only issue is that docker sort of bypasses all iptables entries, fail2ban makes the entry but those are ignored by docker, resulting in having the correct rule in iptables or ufw, but not actually blocking the IP. I needed the latest features such as the ability to forward HTTPS enabled sites. Connections to the frontend show the visitors IP address, while connections made by HAProxy to the backends use HAProxys IP address. Same thing for an FTP server or any other kind of servers running on the same machine. edit: most of your issues stem from having different paths / container / filter names imho, set it up exactly as I posted as that works to try it out, and then you can start adjusting paths and file locations and container names provided you change them in all relevant places. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. 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. Personally I don't understand the fascination with f2b. Is it save to assume it is the default file from the developer's repository? Fill in the needed info for your reverse proxy entry. But anytime having it either totally running on host or totally on Container for any software is best thing to do. Yes! Thanks for writing this. 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 Before you begin, you should have an Ubuntu 14.04 server set up with a non-root account. An action is usually simple. How would I easily check if my server is setup to only allow cloudflare ips? I agree than Nginx Proxy Manager is one of the potential users of fail2ban. HAProxy is performing TLS termination and then communicating with the web server with HTTP. All I needed to do now was add the custom action file: Its actually pretty simple, I more-or-less copied iptables-multiport.conf and wrapped all the commands in a ssh [emailprotected] '' so that itll start an SSH session, run the one provided command, dump its output to STDOUT, and then exit. If you set up Postfix, like the above tutorial demonstrates, change this value to mail: You need to select the email address that will be sent notifications. Theres a number of actions that Fail2Ban can trigger, but most of them are localized to the local machine (plus maybe some reporting). It's the configuration of it that would be hard for the average joe. And those of us with that experience can easily tweak f2b to our liking. We need to enable some rules that will configure it to check our Nginx logs for patterns that indicate malicious activity. Please read the Application Setup section of the container documentation.. The log shows "failed to execute ban jail" and "error banning" despite the ban actually happening (probably at the cloudflare level. The unban action greps the deny.conf file for the IP address and removes it from the file. This is set by the ignoreip directive. Regarding Cloudflare v4 API you have to troubleshoot. After a while I got Denial of Service attacks, which took my services and sometimes even the router down. To y'all looking to use fail2ban with your nginx-proxy-manager in docker here's a tip: In your jail.local file under where the section (jail) for nginx-http-auth is you need to add this line so when something is banned it routes through iptables correctly with docker: Anyone who has a guide how to implement this by myself in the image? @kmanwar89 Cloudflare is not blocking all things but sure, the WAF and bot protection are filtering a lot of the noise. However, it is a general balancing of security, privacy and convenience. Secure Your Self Hosting with Fail2Ban + Nginx Proxy Manager + CloudFlare 16,187 views Jan 20, 2022 Today's video is sponsored by Linode! Depends. But i dont want to setup fail2ban that it blocks my proxy so that it gets banned and nobody can access those webservices anymore because blocking my proxys ip will result in blocking every others ip, too. Yes, its SSH. Press J to jump to the feed. Every rule in the chain is checked from top to bottom, and when one matches, its applied. In this case, the action is proxy-iptables (which is what I called the file, proxy-iptables.conf), and everything after it in [ ] brackets are the parameters. Have you correctly bind mounted your logs from NPM into the fail2ban container?

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