nginx proxy manager fail2bannginx proxy manager fail2ban

This gist contains example of how you can configure nginx reverse-proxy with autmatic container discovery, SSL certificates It works for me also. But there's no need for anyone to be up on a high horse about 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. @jellingwood "/action.d/action-ban-docker-forceful-browsing.conf" - took me some time before I realized it. 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 would rank fail2ban as a primary concern and 2fa as a nice to have. The problem is that when i access my web services with an outside IP, for example like 99.99.99.99, my nginx proxy takes that request, wraps its own ip around it, for example 192.168.0.1, and then sends it to my webserver. You'll also need to look up how to block http/https connections based on a set of ip addresses. 2023 DigitalOcean, LLC. Always a personal decision and you can change your opinion any time. Errata: both systems are running Ubuntu Server 16.04. How would fail2ban work on a reverse proxy server? 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. We can add an [nginx-noproxy] jail to match these requests: When you are finished making the modifications you need, save and close the file. Finally I am able to ban Ip using fail2ban-docker, npm-docker and emby-docker. How can I recognize one? sender = fail2ban@localhost, setup postfix as per here: However, we can create our own jails to add additional functionality. So now there is the final question what wheighs more. What are they trying to achieve and do with my server? @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? --The same result happens if I comment out the line "logpath - /var/log/npm/*.log". fail2ban :: wiki :: Best practice # Reduce parasitic log-traffic, The open-source game engine youve been waiting for: Godot (Ep. 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. Here is the sample error log from nginx 2017/10/18 06:55:51 [warn] 34604#34604: *1 upstream server temporarily disabled while connecting to upstream, client: , server: mygreat.server.com, request: "GET / HTTP/1.1", upstream: "https://:443/", host: "mygreat.server.com" Very informative and clear. Yep. 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. Well occasionally send you account related emails. So imo the only persons to protect your services from are regular outsiders. Otherwise, anyone that knows your WAN IP, can just directly communicate with your server and bypass Cloudflare. 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? 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. I am having an issue with Fail2Ban and nginx-http-auth.conf filter. Each rule basically has two main parts: the condition, and the action. This is set by the ignoreip directive. 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. My switch was from the jlesage fork to yours. How would I easily check if my server is setup to only allow cloudflare ips? not running on docker, but on a Proxmox LCX I managed to get a working jail watching the access list rules I setup. I'm not all that technical so perhaps someone else can confirm whether this actually works for npm. Lol. First, create a new jail: This jail will monitor Nginxs error log and perform the actions defined below: The ban action will take the IP address that matches the jail rules (based on max retry and findtime), prefix it with deny, and add it to the deny.conf file. I am after this (as per my /etc/fail2ban/jail.local): Same for me, would be really great if it could added. WebAs I started trying different settings to get one of services to work I changed something and am now unable to access the webUI. Any guesses? But if you This has a pretty simple sequence of events: So naturally, when host 192.0.2.7 says Hey heres a connection from 203.0.11.45, the application knows that 203.0.11.45 is the client, and what it should log, but iptables isnt seeing a connection from 203.0.11.45, its seeing a connection from 192.0.2.7 thats passing it on. WebFail2Ban is a wonderful tool for managing failed authentication or usage attempts for anything public facing. Any guidance welcome. I'm very new to fail2ban need advise from y'all. This varies based on your Linux distribution, but for most people, if you look in /etc/apache2, you should be able to search to find the line:. Or save yourself the headache and use cloudflare to block ips there. Big question: How do I set this up correctly that I can't access my Webservices anymore when my IP is banned? 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. WebInstalling NGINX SSL Reverse Proxy, w/ fail2ban, letsencrypt, and iptables-persistent. I've been hoping to use fail2ban with my npm docker compose set-up. HAProxy is performing TLS termination and then communicating with the web server with HTTP. 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. The following regex does not work for me could anyone help me with understanding it? However, any publicly accessible password prompt is likely to attract brute force attempts from malicious users and bots. Is fail2ban a better option than crowdsec? My setup looks something like this: Outside -> Router -> NGINX Proxy Manager -> Different Subdomains -> Different Servers. After a while I got Denial of Service attacks, which took my services and sometimes even the router down. privacy statement. The card will likely have a 0, and the view will be empty, or should, so we need to add a new host. This will prevent our changes from being overwritten if a package update provides a new default file: Open the newly copied file so that we can set up our Nginx log monitoring: We should start by evaluating the defaults set within the file to see if they suit our needs. 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. 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. An action is usually simple. The findtime specifies an amount of time in seconds and the maxretry directive indicates the number of attempts to be tolerated within that time. I switched away from that docker container actually simply because it wasn't up-to-date enough for me. Almost 4 years now. My dumbness, I am currently using NPM with a MACVLAN, therefore the fail2ban container can read the mounted logs and create ip tables on the host, but the traffice from and to NPM is not going to the iptables of the host because of the MACVLAN and so banning does not work. ! bantime = 360 as in example? You can follow this guide to configure password protection for your Nginx server. Same thing for an FTP server or any other kind of servers running on the same machine. i.e. Tldr: Don't use Cloudflare for everything. Fail2ban does not update the iptables. Use the "Global API Key" available from https://dash.cloudflare.com/profile/api-tokens. Already on GitHub? Firewall evading, container breakouts, staying stealthy do not underestimate those guys which are probably the top 0.1% of hackers. Web Server: Nginx (Fail2ban). 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. However, it is a general balancing of security, privacy and convenience. 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). Requests from HAProxy to the web server will contain a HTTP header named X-Forwarded-For that contains the visitors IP address. Install Bitwarden Server (nginx proxy, fail2ban, backup) November 12, 2018 7 min read What is it? For some reason filter is not picking up failed attempts: Many thanks for this great article! 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. Anyone who wants f2b can take my docker image and build a new one with f2b installed. The steps outlined here make many assumptions about both your operating environment and your understanding of the Linux OS and services running on Linux. However, it has an unintended side effect of blocking services like Nextcloud or Home Assistant where we define the trusted proxies. Hello, on host can be configured with geoip2 , stream I have read it could be possible, how? Fill in the needed info for your reverse proxy entry. Thanks for your blog post. [Init], maxretry = 3 Start by setting the mta directive. The DoS went straight away and my services and router stayed up. If not, you can install Nginx from Ubuntus default repositories using apt. All rights belong to their respective owners. This will allow Nginx to block IPs that Fail2ban identifies from the Nginx error log file. I am behind Cloudflare and they actively protect against DoS, right? I am using the current LTS Ubuntu distribution 16.04 running in the cloud on a DigitalOcean Droplet. Have a question about this project? If I test I get no hits. We need to create the filter files for the jails weve created. Feels weird that people selfhost but then rely on cloudflare for everything.. Who says that we can't do stuff without Cloudflare? F2B is definitely a good improvement to be considered. If you are not using Cloudflare yet, just ignore the cloudflare-apiv4 action.d script and focus only on banning with iptables. These will be found under the [DEFAULT] section within the file. Evaluate your needs and threats and watch out for alternatives. privacy statement. https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-14-04. 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. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? We are not affiliated with GitHub, Inc. or with any developers who use GitHub for their projects. I started my selfhosting journey without Cloudflare. Then the services got bigger and attracted my family and friends. For that, you need to know that iptables is defined by executing a list of rules, called a chain. For example, my nextcloud instance loads /index.php/login. I believe I have configured my firewall appropriately to drop any non-cloudflare external ips, but I just want a simple way to test that belief. You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link! real_ip_header CF-Connecting-IP; hope this can be useful. With the visitor IP addresses now being logged in Nginxs access and error logs, Fail2ban can be configured. Today's video is sponsored by Linode!Sign up today and get a $100 60-day credit on your new Linode account, link is in the description. https://dbte.ch/linode/=========================================/This video assumes that you already use Nginx Proxy Manager and Cloudflare for your self-hosting.Fail2ban scans log files (e.g. And those of us with that experience can easily tweak f2b to our liking. At what point of what we watch as the MCU movies the branching started? The log shows "failed to execute ban jail" and "error banning" despite the ban actually happening (probably at the cloudflare level. Maybe someone in here has a solution for this. Otherwise, Fail2ban is not able to inspect your NPM logs!". Use the "Hosts " menu to add your proxy hosts. The above filter and jail are working for me, I managed to block myself. Would be great to have fail2ban built in like the linuxserver/letsencrypt Docker container! I'm assuming this should be adjusted relative to the specific location of the NPM folder? If youve ever done some proxying and see Fail2Ban complaining that a host is already banned, this is one cause. After this fix was implemented, the DoS stayed away for ever. How would fail2ban work on a reverse proxy server? I guess fail2ban will never be implemented :(. 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. So I added the fallback__.log and the fallback-_.log to my jali.d/npm-docker.local. Because how my system is set up, Im SSHing as root which is usually not recommended. But, when you need it, its indispensable. If youd like to learn more about fail2ban, check out the following links: Thanks for learning with the DigitalOcean Community. so even in your example above, NPM could still be the primary and only directly exposed service! Fail2ban already blocked several Chinese IPs because of this attempt, and I lowered to maxretry 0 and ban for one week. I just installed an app ( Azuracast, using docker), but the Fail2ban can scan many different types of logs such as Nginx, Apache and ssh logs. Privacy or security? I'd suggest blocking up ranges for china/Russia/India/ and Brazil. Connect and share knowledge within a single location that is structured and easy to search. With both of those features added i think this solution would be ready for smb production environments. 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. actioncheck = -n -L DOCKER-USER | grep -q 'f2b-[ \t]' Crap, I am running jellyfin behind cloudflare. I would also like to vote for adding this when your bandwidth allows. So inside in your nginx.conf and outside the http block you have to declare the stream block like this: stream { # server { listen 80; proxy_pass 192.168.0.100:3389; } } With the above configuration just proxying your backend on tcp layer with a cost of course. Description. Just Google another fail2ban tutorial, and you'll get a much better understanding. What i would like to prevent are the last 3 lines, where the return code is 401. To learn how to use Postfix for this task, follow this guide. 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. 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- @BaukeZwart , Can you please let me know how to add the ban because I added the ban action but it's not banning the IP. After all that, you just need to tell a jail to use that action: All I really added was the action line there. If you are using volumes and backing them up nightly you can easily move your npm container or rebuild it if necessary. But at the end of the day, its working. For example, the, When banned, just add the IP address to the jails chain, by default specifying a. Then configure Fail2ban to add (and remove) the offending IP addresses to a deny-list which is read by Nginx. Dashboard View Yes fail2ban would be the cherry on the top! Your browser does not support the HTML5