The suggestion to use sendername doesnt work anymore, if you use mta = mail, or perhaps it never did. 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. In your instructions, you mount the NPM files as /data/logs and mount it to /log/npm, but in this blog post, the author specifically mentions "Ensure that you properly bind mount the logs at /data/logs of your NPM reverse proxy into the Fail2ban docker container at /var/log/npm. Multiple applications/containers may need to have fail2ban, but only one instance can run on a system since it is playing with iptables rules. Have a question about this project? Proxying Site Traffic with NginX Proxy Manager. 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. 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. The following regex does not work for me could anyone help me with understanding it? Each chain also has a name. @vrelk Upstream SSL hosts support is done, in the next version I'll release today. Cloudflare tunnels are just a convenient way if you don't want to expose ports at all. Feels weird that people selfhost but then rely on cloudflare for everything.. Who says that we can't do stuff without Cloudflare? At what point of what we watch as the MCU movies the branching started? Have a question about this project? Open the file for editing: Below the failregex specification, add an additional pattern. To remove mod_cloudflare, you should comment out the Apache config line that loads mod_cloudflare. 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. However, fail2ban provides a great deal of flexibility to construct policies that will suit your specific security needs. Or save yourself the headache and use cloudflare to block ips there. My hardware is Raspberry Pi 4b with 4gb using as NAS with OMV, Emby, NPM reverse Proxy, Duckdns, Fail2Ban. We will use an Ubuntu 14.04 server. @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. Isn't that just directing traffic to the appropriate service, which then handles any authentication and rejection? It's completely fine to let people know that Cloudflare can, and probably will, collect some of your data if you use them. What's the best 2FA / fail2ban with a reverse proxy : r/unRAID 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. I then created a separate instance of the f2b container following your instructions, which also seem to work (at least so far). Then the DoS started again. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Truce of the burning tree -- how realistic? Domain names: FQDN address of your entry. These items set the general policy and can each be overridden in specific jails. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Maybe someone in here has a solution for this. In my opinion, no one can protect against nation state actors or big companies that may allied with those agencies. 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? Forgot to mention, i googled those Ips they was all from china, are those the attackers who are inside my server? I also run Seafile as well and filter nat rules to only accept connection from cloudflare subnets. This change will make the visitors IP address appear in the access and error logs. 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 To change this behavior, use the option forwardfor directive. All rights reserved. How can I recognize one? Super secret stuff: I'm not working on v2 anymore, and instead slowly working on v3. 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. If that chain didnt do anything, then it comes back here and starts at the next rule. rev2023.3.1.43269. I agree than Nginx Proxy Manager is one of the potential users of fail2ban. But if you 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. Hello, thanks for this article! I'll be considering all feature requests for this next version. On the other hand, f2b is easy to add to the docker container. But, when you need it, its indispensable. Please read the Application Setup section of the container 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. And to be more precise, it's not really NPM itself, but the services it is proxying. Just for a little background if youre not aware, iptables is a utility for running packet filtering and NAT on Linux. Bitwarden is a password manager which uses a server which can be WebFail2ban. What does a search warrant actually look like? Hope I have time to do some testing on this subject, soon. Connections to the frontend show the visitors IP address, while connections made by HAProxy to the backends use HAProxys IP address. In this guide, we will demonstrate how to install fail2ban and configure it to monitor your Nginx logs for intrusion attempts. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? Well occasionally send you account related emails. The only workaround I know for nginx to handle this is to work on tcp level. By default, Nginx is configured to start automatically when the server boots/reboots. If you wish to apply this to all sections, add it to your default code block. Thanks @hugalafutro. in nextcloud I define the trusted proxy like so in config.php: in ha I define it in configuration.yaml like so: Hi all, In terminal: $ sudo apt install nginx Check to see if Nginx is running. How would fail2ban work on a reverse proxy server? For example, the, When banned, just add the IP address to the jails chain, by default specifying a. 502 Bad Gateway in Nginx commonly occurs when Nginx runs as a reverse proxy, and is unable to connect to backend services. Proxy: HAProxy 1.6.3 Firewall evading, container breakouts, staying stealthy do not underestimate those guys which are probably the top 0.1% of hackers. So now there is the final question what wheighs more. Very informative and clear. Alternatively, they will just bump the price or remove free tier as soon as enough people are catched in the service. As well as "Failed to execute ban jail 'npm-docker' action 'cloudflare-apiv4' [] : 'Script error'". Additionally I tried what you said about adding the filter=npm-docker to my file in jail.d, however I observed this actually did not detect the IP's, so I removed that line. 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. Nginx proxy manager, how to forward to a specific folder? Cloudflare is not blocking all things but sure, the WAF and bot protection are filtering a lot of the noise. Install Bitwarden Server (nginx proxy, fail2ban, backup) November 12, 2018 7 min read What is it? If you are interested in protecting your Nginx server with fail2ban, you might already have a server set up and running. Asked 4 months ago. Your tutorial was great! 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 best answers are voted up and rise to the top, Not the answer you're looking for? For some reason filter is not picking up failed attempts: Many thanks for this great article! By default, fail2ban is configured to only ban failed SSH login attempts. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Yes! WebFail2ban. But is the regex in the filter.d/npm-docker.conf good for this? 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. 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). Its one of the standard tools, there is tons of info out there. The next part is setting up various sites for NginX to proxy. Nothing helps, I am not sure why, and I dont see any errors that why is F2B unable to update the iptables rules. 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. Privacy or security? Generally this is set globally, for all jails, though individual jails can change the action or parameters themselves. 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. in fail2ban's docker-compose.yml mount npm log directory as read only like so: then create data/filter.d/npm-docker.conf with contents: then create data/jail.d/npm-docker.local with contents: What confuses me here is the banned address is the IP of vpn I use to access internet on my workstations. To get started, we need to adjust the configuration file that fail2ban uses to determine what application logs to monitor and what actions to take when offending entries are found. However, there are two other pre-made actions that can be used if you have mail set up. You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link! I would also like to vote for adding this when your bandwidth allows. is there a chinese version of ex. Thanks! 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. WebFail2Ban is a wonderful tool for managing failed authentication or usage attempts for anything public facing. 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/. This container runs with special permissions NET_ADMIN and NET_RAW and runs in host network mode by default. By taking a look at the variables and patterns within the /etc/fail2ban/jail.local file, and the files it depends on within the /etc/fail2ban/filter.d and /etc/fail2ban/action.d directories, you can find many pieces to tweak and change as your needs evolve. I started my selfhosting journey without Cloudflare. @arsaboo I use both ha and nextcloud (and other 13-ish services, including mail server) with n-p-m set up with fail2ban as I outlined above without any issue. I used following guides to finally come up with this: https://www.the-lazy-dev.com/en/install-fail2ban-with-docker/ - iptable commands etc .. Hope this helps some one like me who is trying to solve the issues they face with fail2ban and docker networks :). DigitalOcean makes it simple to launch in the cloud and scale up as you grow whether youre running one virtual machine or ten thousand. as in example? But how? Use the "Global API Key" available from https://dash.cloudflare.com/profile/api-tokens. I've tried both, and both work, so not sure which is the "most" correct. I'm not an regex expert so any help would be appreciated. So I assume you don't have docker installed or you do not use the host network for the fail2ban container. It seems to me that goes against what , at least I, self host for. They can and will hack you no matter whether you use Cloudflare or not. I would rank fail2ban as a primary concern and 2fa as a nice to have. Maybe recheck for login credentials and ensure your API token is correct. Did you try this out with any of those? --The same result happens if I comment out the line "logpath - /var/log/npm/*.log". Description. I guess Ill stick to using swag until maybe one day it does. Now that NginX Proxy Manager is up and running, let's setup a site. This will allow Nginx to block IPs that Fail2ban identifies from the Nginx error log file. You signed in with another tab or window. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. The steps outlined here make many assumptions about both your operating environment and Yes, you can use fail2ban with anything that produces a log file. So please let this happen! However, you must ensure that only IPv4 and IPv6 IP addresses of the Cloudflare network are allowed to talk to your server. To influence multiple hosts, you need to write your own actions. Just neglect the cloudflare-apiv4 action.d and only rely on banning with iptables. Right, they do. Each jail within the configuration file is marked by a header containing the jail name in square brackets (every section but the [DEFAULT] section indicates a specific jails configuration). Similarly, Home Assistant requires trusted proxies (https://www.home-assistant.io/integrations/http/#trusted_proxies). 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. I really had no idea how to build the failregex, please help . Is fail2ban a better option than crowdsec? Tldr: Don't use Cloudflare for everything. You may also have to adjust the config of HA. It took me a while to understand that it was not an ISP outage or server fail. 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. The card will likely have a 0, and the view will be empty, or should, so we need to add a new host. However, though I can successfully now ban with it, I don't get notifications for bans and the logs don't show a successful ban. Indeed, and a big single point of failure. 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. Using Fail2ban behind a proxy requires additional configuration to block the IP address of offenders. And now, even with a reverse proxy in place, Fail2Ban is still effective. Is it save to assume it is the default file from the developer's repository? Maybe drop into the Fail2ban container and validate that the logs are present at /var/log/npm. Forward port: LAN port number of your app/service. 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. Can I implement this without using cloudflare tunneling? As for access-log, it is not advisable (due to possibly large parasite traffic) - better you'd configure nginx to log unauthorized attempts to another log-file and monitor it in the jail. If I test I get no hits. Want to be generous and help support my channel? All rights belong to their respective owners. Or the one guy just randomly DoS'ing your server for the lulz. What i would like to prevent are the last 3 lines, where the return code is 401. How would I easily check if my server is setup to only allow cloudflare ips? We do not host any of the videos or images on our servers. 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. Authelia itself doesnt require a LDAP server or its own mysql database, it can use built in single file equivalents just fine for small personal installations. Personally I don't understand the fascination with f2b. 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/. What I really need is some way for Fail2Ban to manage its ban list, effectively, remotely. 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. Use the "Hosts " menu to add your proxy hosts. I'm curious to get this working, but may actually try CrowdSec instead, since the developers officially support the integration into NPM. 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. Additionally, how did you view the status of the fail2ban jails? If not, you can install Nginx from Ubuntus default repositories using apt. This is important - reloading ensures that changes made to the deny.conf file are recognized. if you have all local networks excluded and use a VPN for access. Next, we can copy the apache-badbots.conf file to use with Nginx. Comment or remove this line, then restart apache, and mod_cloudflare should be gone. Nginx is a web server which can also be used as a reverse proxy. Click on 'Proxy Hosts' on the dashboard. However, having a separate instance of fail2ban (either running on the host or on a different container) allows you to monitor all of your containers/servers. @dariusateik the other side of docker containers is to make deployment easy. Ultimately, it is still Cloudflare that does not block everything imo. nginxproxymanager fail2ban for 401. The value of the header will be set to the visitors IP address. 100 % agree - > On the other hand, f2b is easy to add to the docker container. 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. If I test I get no hits. I have configured the fail2ban service - which is located at the webserver - to read the right entrys of my log to get the outsiders IP and blocks it. 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. Then configure Fail2ban to add (and remove) the offending IP addresses to a deny-list which is read by Nginx. privacy statement. 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.
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