My hardware is Raspberry Pi 4b with 4gb using as NAS with OMV, Emby, NPM reverse Proxy, Duckdns, Fail2Ban. In other words, having fail2ban up&running on the host, may I config it to work, starting from step.2? By default, fail2ban is configured to only ban failed SSH login attempts. Using Fail2ban behind a proxy requires additional configuration to block the IP address of offenders. The name is used to name the chain, which is taken from the name of this jail (dovecot), port is taken from the port list, which are symbolic port names from /etc/services, and protocol and chain are taken from the global config, and not overridden for this specific jail. When operating a web server, it is important to implement security measures to protect your site and users. These configurations allow Fail2ban to perform bans The inspiration for and some of the implementation details of these additional jails came from here and here. Next, we can copy the apache-badbots.conf file to use with Nginx. If I test I get no hits. Ultimately, it is still Cloudflare that does not block everything imo. PTIJ Should we be afraid of Artificial Intelligence? How To Install nginx on CentOS 6 with yum, /etc/fail2ban/filter.d/nginx-http-auth.conf, /etc/fail2ban/filter.d/nginx-noscript.conf, /etc/fail2ban/filter.d/nginx-noproxy.conf, Simple and reliable cloud website hosting, New! These will be found under the [DEFAULT] section within the file. 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. What I really need is some way for Fail2Ban to manage its ban list, effectively, remotely. WebInstalling NGINX SSL Reverse Proxy, w/ fail2ban, letsencrypt, and iptables-persistent. Along banning failed attempts for n-p-m I also ban failed ssh log ins. Note that most jails dont define their own actions, and this is the global one: So all I had to do was just take this part from the top of the file, and drop it down. These items set the general policy and can each be overridden in specific jails. However, I still receive a few brute-force attempts regularly although Cloudflare is active. As v2 is not actively developed, just patched by the official author, it will not be added in v2 unless someone from the community implements it and opens a pull request. This is important - reloading ensures that changes made to the deny.conf file are recognized. Super secret stuff: I'm not working on v2 anymore, and instead slowly working on v3. If you are using volumes and backing them up nightly you can easily move your npm container or rebuild it if necessary. 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. As currently set up I'm using nginx Proxy Manager with nginx in Docker containers. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I agree than Nginx Proxy Manager is one of the potential users of fail2ban. 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. In the volume directive of the compose file, you mention the path as - "../nginx-proxy-manager/data/logs/:/log/npm/:ro". Same for me, would be really great if it could added. 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! With the visitor IP addresses now being logged in Nginxs access and error logs, Fail2ban can be configured. Additionally, how did you view the status of the fail2ban jails? I am using the current LTS Ubuntu distribution 16.04 running in the cloud on a DigitalOcean Droplet. We can create an [nginx-noscript] jail to ban clients that are searching for scripts on the website to execute and exploit. I am having trouble here with the iptables rules i.e. Truce of the burning tree -- how realistic? Proxying Site Traffic with NginX Proxy Manager. Start by setting the mta directive. You can follow this guide to configure password protection for your Nginx server. However, we can create other chains, and one action on a rule is to jump to another chain and start evaluating it. However, by default, its not without its drawbacks: Fail2Ban uses iptables I am having an issue with Fail2Ban and nginx-http-auth.conf filter. Fail2ban is a daemon to ban hosts that cause multiple authentication errors.. Install/Setup. thanks. Finally I am able to ban Ip using fail2ban-docker, npm-docker and emby-docker. https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-14-04. 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. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Depends. You could also use the action_mwl action, which does the same thing, but also includes the offending log lines that triggered the ban: Now that you have some of the general fail2ban settings in place, we can concentrate on enabling some Nginx-specific jails that will monitor our web server logs for specific behavior patterns. I followed the above linked blog and (on the second attempt) got the fail2ban container running and detecting my logs, but I do get an error which (I'm assuming) actually blocks any of the ban behavior from taking effect: f2b | 2023-01-28T16:41:28.094008433Z 2023-01-28 11:41:28,093 fail2ban.actions [1]: ERROR Failed to execute ban jail 'npm-general-forceful-browsing' action 'action-ban-docker-forceful-browsing' info 'ActionInfo({'ip': '75.225.129.88', 'family': 'inet4', 'fid': at 0x7f0d4ec48820>, 'raw-ticket': at 0x7f0d4ec48ee0>})': Error banning 75.225.129.88. So I have 2 "working" iterations, and need to figure out the best from each and begin to really understand what I'm doing, rather than blindly copying others' logs. Errata: both systems are running Ubuntu Server 16.04. I added an access list in NPM that uses the Cloudflare IPs, but when I added this bit from the next little warning: real_ip_header CF-Connecting-IP;, I got 403 on all requests. You signed in with another tab or window. If that chain didnt do anything, then it comes back here and starts at the next rule. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Currently fail2ban doesn't play so well sitting in the host OS and working with a container. To make this information appear in the logs of Nginx, modify nginx.conf to include the following directives in your http block. If you are interested in protecting your Nginx server with fail2ban, you might already have a server set up and running. Thanks for your blog post. Premium CPU-Optimized Droplets are now available. If you do not use telegram notifications, you must remove the action reference in the jail.local as well as action.d scripts. sender = fail2ban@localhost, setup postfix as per here: The sendername directive can be used to modify the Sender field in the notification emails: In fail2ban parlance, an action is the procedure followed when a client fails authentication too many times. I'm curious to get this working, but may actually try CrowdSec instead, since the developers officially support the integration into NPM. Any guesses? findtime = 60, NOTE: for docker to ban port need to use single port and option iptables -m conntrack --ctorigdstport --ctdir ORIGINAL, my personal opinion nginx-proxy-manager should be ONLY nginx-proxy-manager ; as with docker concept fail2ban and etc, etc, you can have as separate containers; better to have one good nginx-proxy-manager without mixing; jc21/nginx-proxy-manager made nice job. WebFail2ban. Sign up for Infrastructure as a Newsletter. In production I need to have security, back ups, and disaster recovery. Not exposing anything and only using VPN. So hardening and securing my server and services was a non issue. 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. 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. At what point of what we watch as the MCU movies the branching started? By default, Nginx is configured to start automatically when the server boots/reboots. How would I easily check if my server is setup to only allow cloudflare ips? But how? 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- Create an account to follow your favorite communities and start taking part in conversations. I've followed the instructions to a T, but run into a few issues. I am after this (as per my /etc/fail2ban/jail.local): After all that, you just need to tell a jail to use that action: All I really added was the action line there. Thanks @hugalafutro. actionban = -I f2b- 1 -s -j 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. The error displayed in the browser is To change this behavior, use the option forwardfor directive. What does a search warrant actually look like? Scheme: http or https protocol that you want your app to respond. Nothing helps, I am not sure why, and I dont see any errors that why is F2B unable to update the iptables rules. Yes, its SSH. The steps outlined here make many assumptions about both your operating environment and Begin by running the following commands as a non-root user to 4/5* with rice. I would rank fail2ban as a primary concern and 2fa as a nice to have. bleepcoder.com uses publicly licensed GitHub information to provide developers around the world with solutions to their problems. Maybe someone in here has a solution for this. 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? Just need to understand if fallback file are useful. Im a newbie. WebFail2Ban is a wonderful tool for managing failed authentication or usage attempts for anything public facing. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. How does the NLT translate in Romans 8:2? Create an account to follow your favorite communities and start taking part in conversations. Ive tried to find Tldr: Don't use Cloudflare for everything. Complete solution for websites hosting. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? It's completely fine to let people know that Cloudflare can, and probably will, collect some of your data if you use them. Fail2Ban runs as root on this system, meaning I added roots SSH key to the authorized_keys of the proxy hosts user with iptables access, so that one can SSH into the other. Still, nice presentation and good explanations about the whole ordeal. I then created a separate instance of the f2b container following your instructions, which also seem to work (at least so far). What i would like to prevent are the last 3 lines, where the return code is 401. By clicking Sign up for GitHub, you agree to our terms of service and Any advice? 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. The supplied /etc/fail2ban/jail.conf file is the main provided resource for this. Then the services got bigger and attracted my family and friends. The header name is set to X-Forwarded-For by default, but you can set custom values as required. This took several tries, mostly just restarting Fail2Ban, checking the logs to see what error it gave this time, correct it, manually clear any rules on the proxy host, and try again. Based on matches, it is able to ban ip addresses for a configured time period. I needed the latest features such as the ability to forward HTTPS enabled sites. If you do not use telegram notifications, you must remove the action Now that NginX Proxy Manager is up and running, let's setup a site. I'd suggest blocking up ranges for china/Russia/India/ and Brazil. 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. 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. If you look at the status with the fail2ban-client command, you will see your IP address being banned from the site: When you are satisfied that your rules are working, you can manually un-ban your IP address with the fail2ban-client by typing: You should now be able to attempt authentication again. Now i've configured fail2ban on my webserver which is behind the proxy correctly (it can detect the right IP adress and bans it) but I can still access the web service with my banned IP. With both of those features added i think this solution would be ready for smb production environments. I want to try out this container in a production environment but am hesitant to do so without f2b baked in. I followed the guide that @mastan30 posted and observed a successful ban (though 24 hours after 3 tries is a bit long, so I have to figure out how to un-ban myself). One of the first items to look at is the list of clients that are not subject to the fail2ban policies. Adding the fallback files seems useful to me. Otherwise fail2ban will try to locate the script and won't find it. Adding the fallback files seems useful to me. So the solution to this is to put the iptables rules on 192.0.2.7 instead, since thats the one taking the actual connections. And those of us with that experience can easily tweak f2b to our liking. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Or save yourself the headache and use cloudflare to block ips there. Setting up fail2ban to monitor Nginx logs is fairly easy using the some of included configuration filters and some we will create ourselves. Just because we are on selfhosted doesn't mean EVERYTHING needs to be selfhosted. I have my fail2ban work : Do someone have any idea what I should do? Similarly, Home Assistant requires trusted proxies (https://www.home-assistant.io/integrations/http/#trusted_proxies). 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. It works for me also. Just for a little background if youre not aware, iptables is a utility for running packet filtering and NAT on Linux. They just invade your physical home and take everything with them or spend some time to find a 0-day in one of your selfhosted exposed services to compromise your server. So the decision was made to expose some things publicly that people can just access via the browser or mobile app without VPN. Learning the basics of how to protect your server with fail2ban can provide you with a great deal of security with minimal effort. To this extent, I might see about creating another user with no permissions except for iptables. 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. i.e. However, it is a general balancing of security, privacy and convenience. Hi @posta246 , Yes my fail2ban is not installed directly on the container, I used it inside a docker-container and forwarded ip ban rules to docker chains. Yes, you can use fail2ban with anything that produces a log file. Almost 4 years now. for reference Ackermann Function without Recursion or Stack. It only takes a minute to sign up. 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. Your browser does not support the HTML5
