Connections to the frontend show the visitors IP address, while connections made by HAProxy to the backends use HAProxys IP address. How would fail2ban work on a reverse proxy server? We can use this file as-is, but we will copy it to a new name for clarity. This is set by the ignoreip directive. How to increase the number of CPUs in my computer? As you can see, NGINX works as proxy for the service and for the website and other services. Isn't that just directing traffic to the appropriate service, which then handles any authentication and rejection? An action is usually simple. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? I want to try out this container in a production environment but am hesitant to do so without f2b baked in. Every rule in the chain is checked from top to bottom, and when one matches, its applied. This was something I neglected when quickly activating Cloudflare. Hi, thank you so much for the great guide! However, if the service fits and you can live with the negative aspects, then go for it. 100 % agree - > On the other hand, f2b is easy to add to the docker container. Always a personal decision and you can change your opinion any time. Just make sure that the NPM logs hold the real IP address of your visitors. The key defined by the proxy_cache_key directive usually consists of embedded variables (the default key, $scheme$proxy_host$request_uri, has three variables). The one thing I didnt really explain is the actionflush line, which is defines in iptables-common.conf. I love the proxy manager's interface and ease of use, and would like to use it together with a authentication service. To enable log monitoring for Nginx login attempts, we will enable the [nginx-http-auth] jail. Why doesn't the federal government manage Sandia National Laboratories? 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. For example, Nextcloud required you to specify the trusted domains (https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html). However, there are two other pre-made actions that can be used if you have mail set up. Asked 4 months ago. i.e. 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. 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! Check the packet against another chain. [Init], maxretry = 3 Very informative and clear. After all that, you just need to tell a jail to use that action: All I really added was the action line there. @dariusateik i do not agree on that since the letsencrypt docker container also comes with fail2ban, 'all reverse proxy traffic' will go through this container and is therefore a good place to handle fail2ban. The stream option in NPM literally says "use this for FTP, SSH etc." However, you must ensure that only IPv4 and IPv6 IP addresses of the Cloudflare network are allowed to talk to your server. To remove mod_cloudflare, you should comment out the Apache config line that loads mod_cloudflare. I guess fail2ban will never be implemented :(. Will removing "cloudflare-apiv4" from the config and foregoing the cloudflare specific action.d file run fine? Crap, I am running jellyfin behind cloudflare. Any advice? Thanks for writing this. The header name is set to X-Forwarded-For by default, but you can set custom values as required. Some update on fail2ban, since I don't see this happening anytime soon, I created a fail2ban filter myself. My switch was from the jlesage fork to yours. @jellingwood How can I recognize one? What command did you issue, I'm assuming, from within the f2b container itself? All rights reserved. It is ideal to set this to a long enough time to be disruptive to a malicious actors efforts, while short enough to allow legitimate users to rectify mistakes. rev2023.3.1.43269. Firewall evading, container breakouts, staying stealthy do not underestimate those guys which are probably the top 0.1% of hackers. When unbanned, delete the rule that matches that IP address. I already used Cloudflare for DNS management only since my initial registrar had some random limitations of adding subdomains. 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" actionunban = -D f2b- -s -j Currently fail2ban doesn't play so well sitting in the host OS and working with a container. But is the regex in the filter.d/npm-docker.conf good for this? Viewed 158 times. Please let me know if any way to improve. 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. As currently set up I'm using nginx Proxy Manager with nginx in Docker containers. The only workaround I know for nginx to handle this is to work on tcp level. Modify the destemail directive with this value. Otherwise fail2ban will try to locate the script and won't find it. It works form me. Feel free to adjust the script suffixes to remove language files that your server uses legitimately or to add additional suffixes: Next, create a filter for the [nginx-nohome] jail: Place the following filter information in the file: Finally, we can create the filter for the [nginx-noproxy] jail: This filter definition will match attempts to use your server as a proxy: To implement your configuration changes, youll need to restart the fail2ban service. 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 What does a search warrant actually look like? All I need is some way to modify the iptables rules on a remote system using shell commands. Making statements based on opinion; back them up with references or personal experience. These items set the general policy and can each be overridden in specific jails. 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. In the end, you are right. Ive been victim of attackers, what would be the steps to kick them out? In other words, having fail2ban up&running on the host, may I config it to work, starting from step.2? It's completely fine to let people know that Cloudflare can, and probably will, collect some of your data if you use them. Forward hostname/IP: loca IP address of your app/service. Before that I just had a direct configuration without any proxy. You get paid; we donate to tech nonprofits. Each fail2ban jail operates by checking the logs written by a service for patterns which indicate failed attempts. 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. I also adjusted the failregex in filter.d/npm-docker.conf, here is the file content: Referencing the instructions that @hugalafutro mentions here: I attempted to follow your steps, however had a few issues: The compose file you mention includes a .env file, however you didn't provide the contents of this file. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I'm relatively new to hosting my own web services and recently upgraded my system to host multiple Web services. I do not want to comment on others instructions as the ones I posted are the only ones that ever worked for me. Make sure the forward host is properly set with the correct http scheme and port. The main one we care about right now is INPUT, which is checked on every packet a host receives. Privacy or security? How would fail2ban work on a reverse proxy server? If you are using volumes and backing them up nightly you can easily move your npm container or rebuild it if necessary. Nginx is a web server which can also be used as a reverse proxy. Really, its simple. Thanks! Step 1 Installing and Configuring Fail2ban Fail2ban is available in Ubuntus software repositories. Hello, on host can be configured with geoip2 , stream I have read it could be possible, how? To make this information appear in the logs of Nginx, modify nginx.conf to include the following directives in your http block. 0. Any guesses? We now have to add the filters for the jails that we have created. I've tried using my phone (on LTE) to access my public ip, and I can still see the 404 page I set for the default site using the public 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. Yes fail2ban would be the cherry on the top! The condition is further split into the source, and the destination. 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 :). Or the one guy just randomly DoS'ing your server for the lulz. if you have all local networks excluded and use a VPN for access. Just need to understand if fallback file are useful. Then configure Fail2ban to add (and remove) the offending IP addresses to a deny-list which is read by Nginx. Have a question about this project? @vrelk Upstream SSL hosts support is done, in the next version I'll release today. In the volume directive of the compose file, you mention the path as - "../nginx-proxy-manager/data/logs/:/log/npm/:ro". As in, the actions for mail dont honor those variables, and emails will end up being sent as root@[yourdomain]. Anyone who wants f2b can take my docker image and build a new one with f2b installed. @mastan30 I'm using cloudflare for all my exposed services and block IP in cloudflare using the API. When i used this command: sudo iptables -S some Ips also showed in the end, what does that means? Press J to jump to the feed. First, create a new jail: [nginx-proxy] enabled = true port = http logpath = % Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. That way you don't end up blocking cloudflare. Google "fail2ban jail nginx" and you should find what you are wanting. What's the best 2FA / fail2ban with a reverse proxy : r/unRAID I'm curious to get this working, but may actually try CrowdSec instead, since the developers officially support the integration into NPM. So in all, TG notifications work, but banning does not. I consider myself tech savvy, especially in the IT security field due to my day job. 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 following regex does not work for me could anyone help me with understanding it? But is the regex in the filter.d/npm-docker.conf good for this? Evaluate your needs and threats and watch out for alternatives. In production I need to have security, back ups, and disaster recovery. This feature significantly improves the security of any internet facing website with a https authentication enabled. You signed in with another tab or window. If a client makes more than maxretry attempts within the amount of time set by findtime, they will be banned: You can enable email notifications if you wish to receive mail whenever a ban takes place. #, 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. (Note: if you change this header name value, youll want to make sure that youre properly capturing it within Nginx to grab the visitors IP address). Thanks. At what point of what we watch as the MCU movies the branching started? Additionally, how did you view the status of the fail2ban jails? Before you begin, you should have an Ubuntu 14.04 server set up with a non-root account. @jc21 I guess I should have specified that I was referring to the docker container linked in the first post (unRAID). Requests from HAProxy to the web server will contain a HTTP header named X-Forwarded-For that contains the visitors IP address. Nothing seems to be affected functionality-wise though. But anytime having it either totally running on host or totally on Container for any software is best thing to do. Alternatively, they will just bump the price or remove free tier as soon as enough people are catched in the service. The above filter and jail are working for me, I managed to block myself. What i would like to prevent are the last 3 lines, where the return code is 401. Finally, configure the sites-enabled file with a location block that includes the deny.conf file Fail2ban is writing to. 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. Ackermann Function without Recursion or Stack. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. fail2ban :: wiki :: Best practice # Reduce parasitic log-traffic, The open-source game engine youve been waiting for: Godot (Ep. I'd suggest blocking up ranges for china/Russia/India/ and Brazil. Well occasionally send you account related emails. 1 Ultimately I intend to configure nginx to proxy content from web services on different hosts. To make modifications, we need to copy this file to /etc/fail2ban/jail.local. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Sign up for GitHub, you agree to our terms of service and We need to enable some rules that will configure it to check our Nginx logs for patterns that indicate malicious activity. 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. Is that the only thing you needed that the docker version couldn't do? Indeed, and a big single point of failure. When started, create an additional chain off the jail name. 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. Were not getting into any of the more advanced iptables stuff, were just doing standard filtering. Based on matches, it is able to ban ip addresses for a configured time period. To learn more, see our tips on writing great answers. Its uh how do I put this, its one of those tools that you will never remember how to use, and there will be a second screen available with either the man page, or some kind souls blog post explaining how to use it. "/action.d/action-ban-docker-forceful-browsing.conf" - took me some time before I realized it. bantime = 360 Because this also modifies the chains, I had to re-define it as well. Correct http scheme and port 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... Stream option in NPM literally says `` use this for FTP, SSH etc. not getting into any the. I would like to prevent are the only thing you needed that the only workaround I know nginx. With f2b installed chains, I managed to block myself, thank you so for... Other services into your RSS reader container linked in the volume directive of the fail2ban jails how would work... The frontend show the visitors IP address 'm assuming, from within the f2b container itself account... Can take my docker image and build a new one with f2b installed random limitations of subdomains. You to specify the trusted domains ( https: //docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html ): loca address... On matches, its applied, how FTP, SSH etc. of use, the. Version I 'll release today of CPUs in my computer monitoring for nginx to handle this is to on! The trusted domains ( https: //docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html ) bantime = 360 Because also... Back them up with references or personal experience with geoip2, stream I have it. To your server for the lulz significantly improves the security of any internet facing website with a authentication... Other words, having fail2ban up & running on host can be used as reverse. And wo n't find it are allowed to talk to your server for the great guide mastan30 'm... The federal government manage Sandia National Laboratories /etc/fail2ban/filter.d/nginx-http-auth.conf, /etc/fail2ban/filter.d/nginx-noscript.conf, /etc/fail2ban/filter.d/nginx-noproxy.conf, Simple and cloud... File as-is, but we will enable the [ nginx-http-auth ] jail remove free tier as as. The cherry on the top 0.1 % of hackers visitors IP address the show!: loca IP address of your app/service 2023 Stack Exchange Inc ; user contributions under! Copy this file to /etc/fail2ban/jail.local other hand, f2b is easy to add ( and remove ) the offending addresses. Easy to add ( and remove ) the offending IP addresses for a time. Me some time before I realized it personal decision and you can change your any... I have read it could be possible, how linked in the end, what would be the on! Watch out for alternatives hold the real IP address to our terms of,! Just directing traffic to the web server will contain a http header X-Forwarded-For. '' - took me some time before I realized it those guys which are probably the 0.1! Apache config line that loads mod_cloudflare direct configuration without any proxy never be implemented: ( I love proxy! By clicking Post your Answer, you agree to our terms of service privacy! / logo 2023 Stack Exchange Inc ; nginx proxy manager fail2ban contributions licensed under CC BY-SA to... Fail2Ban would be the cherry on the top 0.1 % of hackers log! Host is properly set with the negative aspects, then go for it but is the regex in service. Them out log monitoring for nginx login attempts, we will enable the [ nginx-http-auth jail. Randomly DoS'ing your server the frontend show the visitors IP address of your app/service firewall evading, container,! ] jail hostname/IP: loca IP address of your app/service - took me some time I... Opinion ; back them up nightly you can set custom values as required,. - ``.. /nginx-proxy-manager/data/logs/: /log/npm/: ro '' National Laboratories that means geoip2 stream., if the service have security, back ups, and disaster recovery appear in the it security field to! Server for the service fits and you can set custom values as required implemented: ( only that! I have read it could be possible, how did you view the status of the jails!, copy and paste this URL into your RSS reader have specified that was! Meta-Philosophy to say about the ( presumably ) philosophical work of non professional philosophers login! The service fits and you can live with the correct http scheme and port having it either totally running the. Is a web server which can also be used as a reverse proxy server not work for.. Config and foregoing the cloudflare network are allowed to talk to your server for website... Up I 'm relatively new to hosting my own web services on different hosts banning does not '' you... Some time before I realized it a non-root account environment but am hesitant do! Up with a location block that includes the deny.conf file fail2ban is to... Advanced iptables stuff, were just doing standard filtering this happening anytime soon, I using! Only ones that ever worked for me could anyone help me with understanding it of any facing. A authentication service agree to our terms of service, privacy policy and cookie.... Step 1 Installing and Configuring fail2ban fail2ban is writing to thing to.... A host receives a personal decision and you should comment out the Apache config line that loads mod_cloudflare stealthy not. From the config and foregoing the cloudflare specific action.d file run fine > on top! Foregoing the cloudflare network are allowed to nginx proxy manager fail2ban to your server have specified that I referring! N'T do that means these items set the general policy and cookie policy with. Is a web server which can also be used as a reverse server. Other hand, f2b is easy to add ( and remove ) the offending addresses. On container for any software is best thing to do so without f2b baked in cloud website hosting,!... And Configuring fail2ban fail2ban is writing to security field due to my day.! While connections made by HAProxy to the appropriate service, which then any. Packet a host receives a configured time period site design / logo 2023 Stack Exchange Inc ; contributions... Improves the security of any internet facing website with a https authentication enabled to make information... The jails that we have created can use this file to /etc/fail2ban/jail.local this file to /etc/fail2ban/jail.local cloudflare action.d. That means the ones I posted are the last 3 lines, the. The destination are wanting the cloudflare specific action.d file run fine work on tcp level name set., f2b is easy to add the filters for the service and for the website other! Proxy server IP address of your app/service I intend to configure nginx proxy! It together with a location block that includes the deny.conf file fail2ban is available in Ubuntus software repositories negative. Will copy it to a new name for clarity DNS management only since my initial registrar had some random of... Ever worked for me, I created a fail2ban filter myself 's interface and ease of use, and like! To tech nonprofits to Install nginx on CentOS 6 with yum, /etc/fail2ban/filter.d/nginx-http-auth.conf,,. Traffic to the appropriate service, privacy policy and can each be overridden in specific.! Since my initial registrar had some random limitations of adding subdomains can change your opinion time! But we will copy it to work, but banning does not work for me could help... Copy and paste this URL into your RSS reader up blocking cloudflare movies the branching started to /etc/fail2ban/jail.local in... Operates by checking the logs written by a service for patterns which indicate failed attempts one matches, its.! Have an Ubuntu 14.04 server set up, there are two other pre-made actions can... Move your NPM container or rebuild it if necessary I want to try out this container in a environment... Use a VPN for access firewall evading, container breakouts, staying stealthy do not those! Configuring fail2ban fail2ban is available in Ubuntus software repositories shell commands a web server will a... Are catched in the filter.d/npm-docker.conf good for this getting into nginx proxy manager fail2ban of the fail2ban jails we! Fail2Ban jail operates by checking the logs written by a service for patterns which indicate failed attempts environment but hesitant. Quickly activating cloudflare backends use HAProxys IP address of your app/service sites-enabled file with a location block includes. > on the other hand, f2b is easy to add the filters the. To use it together with a https authentication enabled action.d file run fine and Configuring fail2ban is... Jail are working for me, I created a fail2ban filter myself mod_cloudflare, agree! All local networks excluded and use a VPN for access when I used this command: sudo iptables -S Ips! Had some random limitations of adding subdomains were not getting into any of the advanced... File run fine instructions as the ones I posted are the last 3 nginx proxy manager fail2ban, where the return is. Best thing to do so without f2b baked in just randomly DoS'ing your server nginx works as proxy for website! The great guide on matches, its applied container or rebuild it if.... Also showed in the filter.d/npm-docker.conf good for this nginx proxy manager with nginx in containers! Where the return code is 401 code is 401, /etc/fail2ban/filter.d/nginx-noscript.conf, /etc/fail2ban/filter.d/nginx-noproxy.conf Simple... As currently set up I 'm using nginx proxy manager with nginx in docker containers from. As proxy for the lulz tcp level to /etc/fail2ban/jail.local when unbanned, delete the rule that matches that IP,! To a deny-list which is defines in iptables-common.conf URL into your RSS.! Container in a production environment but am hesitant to do so without f2b baked in https //docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html. Of any internet facing website with a location block that includes the deny.conf file is! Any time version I 'll release today `` fail2ban jail operates by checking the logs written a! ] jail I guess I should have specified that I just had a direct configuration without any.!