EDIT: The issue was I incorrectly mapped my persisted NPM logs. By default, fail2ban is configured to only ban failed SSH login attempts. Or save yourself the headache and use cloudflare to block ips there. 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. @BaukeZwart Can we get free domain using cloudfare, I got a domain from duckdns and added it nginx reverse proxy but fail2ban is not banning the ip's, can I use cloudfare with free domain and nginx proxy, do you have any config for docker please? Well occasionally send you account related emails. Its one of the standard tools, there is tons of info out there. nice tutorial but despite following almost everything my fail2ban status is different then the one is give in this tutorial as example. I started my selfhosting journey without Cloudflare. @hugalafutro I tried that approach and it works. 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. Thanks. In terminal: $ sudo apt install nginx Check to see if Nginx is running. To remove mod_cloudflare, you should comment out the Apache config line that loads mod_cloudflare. Yes fail2ban would be the cherry on the top! I've been hoping to use fail2ban with my npm docker compose set-up. Generally Fail2Ban is then used to update firewall rules to reject the IP addresses for a specified amount of time, although any arbitrary other action (e.g. This will let you block connections before they hit your self hosted services. Before you begin, you should have an Ubuntu 14.04 server set up with a non-root account. So now there is the final question what wheighs more. 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 just installed an app ( Azuracast, using docker), but the We can use this file as-is, but we will copy it to a new name for clarity. I am behind Cloudflare and they actively protect against DoS, right? Requests coming from the Internet will hit the proxy server (HAProxy), which analyzes the request and forwards it on to the appropriate server (Nginx). The header name is set to X-Forwarded-For by default, but you can set custom values as required. LEM current transducer 2.5 V internal reference, Book about a good dark lord, think "not Sauron". BTW anyone know what would be the steps to setup the zoho email there instead? 502 Bad Gateway in Nginx commonly occurs when Nginx runs as a reverse proxy, and is unable to connect to backend services. But if you take the example of someone also running an SSH server, you may also want fail2ban on it. Privacy or security? Once your Nginx server is running and password authentication is enabled, you can go ahead and install fail2ban (we include another repository re-fetch here in case you already had Nginx set up in the previous steps): This will install the software. Today weve seen the top 5 causes for this error, and how to fix it. 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. In production I need to have security, back ups, and disaster recovery. Now that NginX Proxy Manager is up and running, let's setup a site. 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. Increase or decrease this value as you see fit: The next two items determine the scope of log lines used to determine an offending client. Here are some ways to support: Patreon: https://dbte.ch/patreon PayPal: https://dbte.ch/paypal Ko-fi: https://dbte.ch/kofi/=========================================/Here's my Amazon Influencer Shop Link: https://dbte.ch/amazonshop Almost 4 years now. Or save yourself the headache and use cloudflare to block ips there. With the visitor IP addresses now being logged in Nginxs access and error logs, Fail2ban can be configured. How to increase the number of CPUs in my computer? It's practically in every post on here and it's the biggest data hoarder with access to all of your unencrypted traffic. You signed in with another tab or window. It only takes a minute to sign up. [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. 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. This worked for about 1 day. So in all, TG notifications work, but banning does not. This is less of an issue with web server logins though if you are able to maintain shell access, since you can always manually reverse the ban. We do not host any of the videos or images on our servers. You can add this to the defaults, frontend, listen and backend sections of the HAProxy config. If you wish to apply this to all sections, add it to your default code block. 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! Additionally, how did you view the status of the fail2ban jails? If that chain didnt do anything, then it comes back here and starts at the next rule. 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. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? @dariusateik the other side of docker containers is to make deployment easy. Thanks for contributing an answer to Server Fault! Because this also modifies the chains, I had to re-define it as well. However, by default, its not without its drawbacks: Fail2Ban uses iptables The supplied /etc/fail2ban/jail.conf file is the main provided resource for this. My Token and email in the conf are correct, so what then? Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, How to Unban an IP properly with Fail2Ban, Permanent block of IP after n retries using fail2ban. As currently set up I'm using nginx Proxy Manager with nginx in Docker containers. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? 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. Always a personal decision and you can change your opinion any time. Depends. To change this behavior, use the option forwardfor directive. When i used this command: sudo iptables -S some Ips also showed in the end, what does that means? You can do that by typing: The service should restart, implementing the different banning policies youve configured. 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. The stream option in NPM literally says "use this for FTP, SSH etc." 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. If you do not use PHP or any other language in conjunction with your web server, you can add this jail to ban those who request these types of resources: We can add a section called [nginx-badbots] to stop some known malicious bot request patterns: If you do not use Nginx to provide access to web content within users home directories, you can ban users who request these resources by adding an [nginx-nohome] jail: We should ban clients attempting to use our Nginx server as an open proxy. It works form me. Isn't that just directing traffic to the appropriate service, which then handles any authentication and rejection? Nginx proxy manager, how to forward to a specific folder? How would I easily check if my server is setup to only allow cloudflare ips? Asking for help, clarification, or responding to other answers. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Ultimately, it is still Cloudflare that does not block everything imo. The default action (called action_) is to simply ban the IP address from the port in question. 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. Any guesses? Before that I just had a direct configuration without any proxy. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? I then created a separate instance of the f2b container following your instructions, which also seem to work (at least so far). If you are interested in protecting your Nginx server with fail2ban, you might already have a server set up and running. I'm confused). edit: To subscribe to this RSS feed, copy and paste this URL into your RSS reader. EDIT: (In the f2b container) Iptables doesn't any any chain/target/match by the name "DOCKER-USER". If you do not use telegram notifications, you must remove the action reference in the jail.local as well as action.d scripts. It's completely fine to let people know that Cloudflare can, and probably will, collect some of your data if you use them. How does the NLT translate in Romans 8:2? I am having an issue with Fail2Ban and nginx-http-auth.conf filter. Well, i did that for the last 2 days but i cant seem to find a working answer. 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 value of the header will be set to the visitors IP address. Solution: It's setting custom action to ban and unban and also use Iptables forward from forward to f2b-npm-docker, f2b-emby which is more configuring up docker network, my docker containers are all in forward chain network, you can change FOWARD to DOCKER-USER or INPUT according to your docker-containers network. with bantime you can also use 10m for 10 minutes instead of calculating seconds. The card will likely have a 0, and the view will be empty, or should, so we need to add a new host. Each fail2ban jail operates by checking the logs written by a service for patterns which indicate failed attempts. Making statements based on opinion; back them up with references or personal experience. Well occasionally send you account related emails. Same thing for an FTP server or any other kind of servers running on the same machine. Graphs are from LibreNMS. I've tried both, and both work, so not sure which is the "most" correct. Big question: How do I set this up correctly that I can't access my Webservices anymore when my IP is banned? The steps outlined here make many assumptions about both your operating environment and Any advice? 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. But anytime having it either totally running on host or totally on Container for any software is best thing to do. I adapted and modified examples from this thread and I think I might have it working with current npm release + fail2ban in docker: run fail2ban in another container via https://github.com/crazy-max/docker-fail2ban All rights belong to their respective owners. 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. Errata: both systems are running Ubuntu Server 16.04. @vrelk Upstream SSL hosts support is done, in the next version I'll release today. @jc21 I guess I should have specified that I was referring to the docker container linked in the first post (unRAID). I'm not an regex expert so any help would be appreciated. I agree than Nginx Proxy Manager is one of the potential users of fail2ban. Fail2ban does not update the iptables. Isn't that just directing traffic to the appropriate service, which then handles any authentication and rejection? 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- Please read the Application Setup section of the container documentation.. I'd suggest blocking up ranges for china/Russia/India/ and Brazil. Feel free to read my blog post on how to tackle this problem: https://blog.lrvt.de/fail2ban-with-nginx-proxy-manager/. In the end, you are right. Otherwise, anyone that knows your WAN IP, can just directly communicate with your server and bypass Cloudflare. WebNow Im trying to get homelab-docs.mydomain.com to go through the tunnel, hit the reverse proxy, and get routed to the backend container thats running dokuwiki. Using Fail2ban behind a proxy requires additional configuration to block the IP address of offenders. So I added the fallback_.log and the fallback-.log to my jali.d/npm-docker.local. Otherwise fail2ban will try to locate the script and won't find it. Tldr: Don't use Cloudflare for everything. Setting up fail2ban to monitor Nginx logs is fairly easy using the some of included configuration filters and some we will create ourselves. You can add additional IP addresses or networks delimited by a space, to the existing list: Another item that you may want to adjust is the bantime, which controls how many seconds an offending member is banned for. Thanks for writing this. 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. What i would like to prevent are the last 3 lines, where the return code is 401. But if you Thanks @hugalafutro. If fail to ban blocks them nginx will never proxy them. At what point of what we watch as the MCU movies the branching started? Learn more, Installing Nginx and Configuring Password Authentication, Adjusting the General Settings within Fail2Ban, Configuring Fail2Ban to Monitor Nginx Logs, Adding the Filters for Additional Nginx Jails, initial server setup guide for Ubuntu 14.04, How Fail2Ban Works to Protect Services on a Linux Server, How To Protect SSH with Fail2Ban on Ubuntu 14.04, How To Protect an Apache Server with Fail2Ban on Ubuntu 14.04, https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-14-04. If you are not using Cloudflare yet, just ignore the cloudflare-apiv4 action.d script and focus only on banning with iptables. Create an account to follow your favorite communities and start taking part in conversations. WebFail2ban. They will improve their service based on your free data and may also sell some insights like meta data and stuff as usual. Not exposing anything and only using VPN. if you have all local networks excluded and use a VPN for access. so even in your example above, NPM could still be the primary and only directly exposed service! 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. What's the best 2FA / fail2ban with a reverse proxy : r/unRAID You'll also need to look up how to block http/https connections based on a set of ip addresses. So as you see, implementing fail2ban in NPM may not be the right place. 4/5* with rice. This gist contains example of how you can configure nginx reverse-proxy with autmatic container discovery, SSL certificates On one hand, this project's goals was for the average joe to be able to easily use HTTPS for their incoming websites; not become a network security specialist. We need to enable some rules that will configure it to check our Nginx logs for patterns that indicate malicious activity. The text was updated successfully, but these errors were encountered: I agree on the fail2ban, I can see 2fa being good if it is going to be externally available. All I need is some way to modify the iptables rules on a remote system using shell commands. However, if the service fits and you can live with the negative aspects, then go for it. WebAs I started trying different settings to get one of services to work I changed something and am now unable to access the webUI. I used to have all these on the same vm and it worked then, later I moved n-p-m to vm where my mail server is, and the vm with nextcloud and ha and other stuff is being tunelled via mullvad and everything still seems to work. To make this information appear in the logs of Nginx, modify nginx.conf to include the following directives in your http block.