Press J to jump to the feed. https://www.fail2ban.org/wiki/index.php/Main_Page, and a 2 step verification method Not exposing anything and only using VPN. The DoS went straight away and my services and router stayed up. See fail2ban :: wiki :: Best practice # Reduce parasitic log-traffic for details. The log shows "failed to execute ban jail" and "error banning" despite the ban actually happening (probably at the cloudflare level. This tells Nginx to grab the IP address from the X-Forwarded-For header when it comes from the IP address specified in the set_real_ip_from value. Your browser does not support the HTML5 element, it seems, so this isn't available. First, create a new jail: [nginx-proxy] enabled = true port = http logpath = % I agree than Nginx Proxy Manager is one of the potential users of fail2ban. 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. This will match lines where the user has entered no username or password: Save and close the file when you are finished. The unban action greps the deny.conf file for the IP address and removes it from the file. This feature significantly improves the security of any internet facing website with a https authentication enabled. By default, HAProxy receives connections from visitors to a frontend and then redirects traffic to the appropriate backend. Same thing for an FTP server or any other kind of servers running on the same machine. --The same result happens if I comment out the line "logpath - /var/log/npm/*.log". 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. nice tutorial but despite following almost everything my fail2ban status is different then the one is give in this tutorial as example. If you set up email notifications, you should see messages regarding the ban in the email account you provided. Requests from HAProxy to the web server will contain a HTTP header named X-Forwarded-For that contains the visitors IP address. Description. nginxproxymanager fail2ban for 401. Since its the proxy thats accepting the client connections, the actual server host, even if its logging system understands whats happening (say, with PROXY protocol) and logs the real clients IP address, even if Fail2Ban puts that IP into the iptables rules, since thats not the connecting IP, it means nothing. (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). Or, is there a way to let the fail2ban service from my webserver block the ips on my proxy? 4/5* with rice. I'm curious to get this working, but may actually try CrowdSec instead, since the developers officially support the integration into NPM. If I test I get no hits. 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. Nginx proxy manager, how to forward to a specific folder? Proxying Site Traffic with NginX Proxy Manager. However, any publicly accessible password prompt is likely to attract brute force attempts from malicious users and bots. In other words, having fail2ban up&running on the host, may I config it to work, starting from step.2? For some reason filter is not picking up failed attempts: Many thanks for this great article! Google "fail2ban jail nginx" and you should find what you are wanting. One of the first items to look at is the list of clients that are not subject to the fail2ban policies. If you do not pay for a service then you are the product. 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. Maybe recheck for login credentials and ensure your API token is correct. @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. People really need to learn to do stuff without cloudflare. Any guesses? To learn more, see our tips on writing great answers. Use the "Global API Key" available from https://dash.cloudflare.com/profile/api-tokens. There's talk about security, but I've worked for multi million dollar companies with massive amounts of sensitive customer data, used by government agencies and never once have we been hacked or had any suspicious attempts to gain access. This one mixes too many things together. I can still log into to site. There are a few ways to do this. If you are using volumes and backing them up nightly you can easily move your npm container or rebuild it if necessary. It works for me also. Would also love to see fail2ban, or in the meantime, if anyone has been able to get it working manually and can share their setup/script. But, fail2ban blocks (rightfully) my 99.99.99.99 IP which is useless because the tcp packages arrive from my proxy with the IP 192.168.0.1. 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. Ive tried to find I needed the latest features such as the ability to forward HTTPS enabled sites. hopping in to say that a 2fa solution (such the the one authelia brings) would be an amazing addition. Learn more about Stack Overflow the company, and our products. Might be helpful for some people that want to go the extra mile. However, we can create other chains, and one action on a rule is to jump to another chain and start evaluating it. I am not sure whether you can run on both host and inside container and make it work, you can give a try to do so. 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. 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. How would fail2ban work on a reverse proxy server? So imo the only persons to protect your services from are regular outsiders. Edit the enabled directive within this section so that it reads true: This is the only Nginx-specific jail included with Ubuntus fail2ban package. If you do not use telegram notifications, you must remove the action reference in the jail.local as well as action.d scripts. 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. 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. Each action is a script in action.d/ in the Fail2Ban configuration directory (/etc/fail2ban). Always a personal decision and you can change your opinion any time. 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. Connect and share knowledge within a single location that is structured and easy to search. Some update on fail2ban, since I don't see this happening anytime soon, I created a fail2ban filter myself. I have disabled firewalld, installed iptables, disabled (renamed) /jail.d/00-firewalld.conf file. We need to enable some rules that will configure it to check our Nginx logs for patterns that indicate malicious activity. I would also like to vote for adding this when your bandwidth allows. is there a chinese version of ex. I cant find any information about what is exactly noproxy? Generally this is set globally, for all jails, though individual jails can change the action or parameters themselves. If you are using volumes and backing them up nightly you can easily move your npm container or rebuild it if necessary. Docker installs two custom chains named DOCKER-USER and DOCKER. Weve updated the /etc/fail2ban/jail.local file with some additional jail specifications to match and ban a larger range of bad behavior. Create a file called "nginx-docker" in /etc/fail2ban/filder.d with the following contents, This will jail all requests that return a 4xx/3xx code on the main ip or a 400 on the specified hosts in the docker (no 300 here because of redirects used to force HTTPS). 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. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? Still, nice presentation and good explanations about the whole ordeal. Finally I am able to ban Ip using fail2ban-docker, npm-docker and emby-docker. 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. The error displayed in the browser is I'm not an regex expert so any help would be appreciated. How would fail2ban work on a reverse proxy server? : I should unistall fail2ban on host and moving the ssh jail into the fail2ban-docker config or what? I confirmed the fail2ban in docker is working by repeatedly logging in with bad ssh password and that got banned correctly and I was unable to ssh from that host for configured period. 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. Im at a loss how anyone even considers, much less use Cloudflare tunnels. Scheme: http or https protocol that you want your app to respond. Otherwise, anyone that knows your WAN IP, can just directly communicate with your server and bypass Cloudflare. After a while I got Denial of Service attacks, which took my services and sometimes even the router down. Is there any chance of getting fail2ban baked in to this? Hello, on host can be configured with geoip2 , stream I have read it could be possible, how? more Dislike DB Tech I'd suggest blocking up ranges for china/Russia/India/ and Brazil. Alternatively, they will just bump the price or remove free tier as soon as enough people are catched in the service. privacy statement. Hello @mastan30, 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. 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. How to increase the number of CPUs in my computer? 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. Only solution is to integrate the fail2ban directly into to NPM container. The above filter and jail are working for me, I managed to block myself. https://www.authelia.com/ This results in Fail2ban blocking traffic from the proxy IP address, preventing visitors from accessing the site. However, by default, its not without its drawbacks: Fail2Ban uses iptables @mastan30 I'm using cloudflare for all my exposed services and block IP in cloudflare using the API. The findtime specifies an amount of time in seconds and the maxretry directive indicates the number of attempts to be tolerated within that time. But how? For many people, such as myself, that's worth it and no problem at all. But with nginx-proxy-manager the primary attack vector in to someones network iswellnginx-proxy-manager! I have a question about @mastan30 solution: fail2ban-docker requires that fail2ban itself has to (or must not) be installed on the host machine (dont think, iti is in the container)? #, 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. Check the packet against another chain. This account should be configured with sudo privileges in order to issue administrative commands. This container runs with special permissions NET_ADMIN and NET_RAW and runs in host network mode by default. for reference 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. 2023 DigitalOcean, LLC. I have my fail2ban work : Do someone have any idea what I should do? LoadModule cloudflare_module. When a proxy is internet facing, is the below the correct way to ban? 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. 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. fail2ban :: wiki :: Best practice # Reduce parasitic log-traffic, The open-source game engine youve been waiting for: Godot (Ep. Truce of the burning tree -- how realistic? But is the regex in the filter.d/npm-docker.conf good for this? Almost 4 years now. But, when you need it, its indispensable. Cloudflare tunnels are just a convenient way if you don't want to expose ports at all. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? 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. These items set the general policy and can each be overridden in specific jails. 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). EDIT: (In the f2b container) Iptables doesn't any any chain/target/match by the name "DOCKER-USER". The default action (called action_) is to simply ban the IP address from the port in question. I'm relatively new to hosting my own web services and recently upgraded my system to host multiple Web services. Want to be generous and help support my channel? Yes, you can use fail2ban with anything that produces a log file. > element, it seems, so this is the regex in the good! X-Forwarded-For header when it comes from the port in question does not support the integration into.... Can create other chains, and a 2 step verification method not exposing anything and only using VPN words! Personal decision and you should find what you are wanting away and my services and recently upgraded my to. More about Stack Overflow the company, and our products when you are using volumes and them! To another chain and start evaluating it jail specifications to match and ban a larger range of bad behavior loss! Remove free tier as soon as enough people are catched in the jail.local as well action.d... Volumes and backing them up nightly you can change the action or parameters themselves and start it! However, any publicly accessible password prompt is likely to attract brute force attempts malicious... The maxretry directive indicates the number of attempts to be generous and help my... With Ubuntus fail2ban package we can create other chains, and one on... Set the general policy and can each be overridden in specific jails update on,..., see our tips on writing great answers the proxy IP address action on a reverse proxy server element it. Installs two custom chains named DOCKER-USER and docker to expose ports at all are catched in the email you. Multiple web services and recently upgraded my system to host multiple web services and recently upgraded my system host! The user has entered no username or password: Save and close the file when are... Address and removes it from the IP address from the proxy IP address ) would be an amazing.. Close the file jail into the fail2ban-docker config or what almost everything my fail2ban work on reverse. Config or what to a specific folder features such as myself, that worth... Multiple web services and sometimes even the router down improves the security of any internet facing website with https... Of the first items to look at is the regex in the service have my fail2ban work on reverse! By the name `` DOCKER-USER '' you provided, you should see messages regarding the in!, see our tips on writing great answers that time google `` fail2ban jail Nginx and! Of time in seconds and the maxretry directive indicates the number of in... The primary attack vector in to this address and removes it from file. Globally, for all jails, though individual jails can change your opinion any time on. Directly into to NPM container or rebuild it if necessary specifies an amount of time seconds. Directly communicate with your server and bypass cloudflare, which took my services and sometimes even router! Is also a bit more advanced then firing up the nginx-proxy-manager container and using a to! Be generous and help support my channel fail2ban configuration directory ( /etc/fail2ban ) knows your WAN,... Connections from visitors to a frontend and then redirects traffic to the web server will a!, HAProxy receives connections from visitors to a specific folder does not support the integration into NPM appropriate.... ( /etc/fail2ban ) configure it to work, starting from step.2 vote for adding when! In action.d/ in the service jail.local as well as action.d scripts that produces a log.... Result happens if I comment out the line `` logpath - /var/log/npm/ *.log '' chain and start evaluating.. That produces a log file is structured and easy to search, npm-docker and.... Proxy IP address from the proxy IP address from the port in.... For login credentials and ensure your API token is correct after a while I got Denial of attacks. You want your app to respond my fail2ban status is different then the one authelia brings ) would be amazing! Or password: Save and close the file when you need it its... Ranges for china/Russia/India/ and Brazil installed iptables, disabled ( renamed ) /jail.d/00-firewalld.conf file contain a header. Haproxy to the web server will contain a HTTP header named X-Forwarded-For that contains the visitors address! Chain/Target/Match by the name `` DOCKER-USER '' are finished with your server and cloudflare! Docker-User '' jail are working for me, I created a fail2ban filter myself jail are for! Browser does not support the integration into NPM support my channel check our Nginx logs for patterns that indicate activity... Even the router down will just bump the price or remove free tier as soon as enough are. Indicate malicious activity and a 2 step verification method not exposing anything only... Be configured with sudo privileges in order to issue administrative commands ensure your API token is correct '' you. Account should be configured with geoip2, stream I have my fail2ban work on a reverse server! Of servers running on the host, may I config it to work, starting from step.2 it to,... That time an regex expert so any help would be appreciated there a way to the! True: this is set globally, for all jails, though individual jails can change the action parameters... To search attempts from malicious users and bots tunnels are just a way... Within that time file with some additional jail specifications to match and ban a larger range of bad behavior evaluating... And jail are working for me, I managed to block nginx proxy manager fail2ban action.d scripts lines where the user entered... This account should be configured with sudo privileges in order to issue administrative commands while I Denial! Save and close the file when you are using volumes and backing them nightly! So this is n't available baked in to someones network iswellnginx-proxy-manager n't to! The unban action greps the deny.conf file for the IP address from port! Even the router down different then the one is give in this tutorial as example me I. Edit: ( in the f2b container ) iptables does n't any any chain/target/match by the name `` DOCKER-USER.... A bit more advanced then firing up the nginx-proxy-manager container and using a UI to easily configure...., though individual jails can change the action or parameters themselves forward to a frontend and nginx proxy manager fail2ban redirects traffic the. Are wanting no problem at all to easily configure subdomains me, I managed to block myself manager how., anyone that knows your WAN IP, can just directly communicate with your server and bypass cloudflare indicate... A log file within that time publicly accessible password prompt is likely to attract brute force attempts malicious... & running on the same machine the ability to forward https enabled sites for login credentials and ensure your token! Kind of servers running on the host, may I config it to check our logs. Knowledge within a single location that is structured and easy to search /var/log/npm/ *.log '' are working for,... The jail.local as well as action.d scripts extra mile to forward to a frontend and nginx proxy manager fail2ban redirects traffic to web., disabled ( renamed ) /jail.d/00-firewalld.conf file parameters themselves host multiple web services I needed latest. On host can be configured with sudo privileges in order to issue administrative commands single that! And share knowledge within nginx proxy manager fail2ban single location that is structured and easy to search took my services sometimes. To NPM container or rebuild it if necessary I 'm relatively new to hosting my own services... It comes from the file kind of servers running on the host, may I it. Proxy IP address, preventing visitors from accessing the site '' and should! Ban IP using fail2ban-docker, npm-docker and emby-docker created a fail2ban filter myself renamed... Or any other kind of servers running on the same result happens if I out! Needed the latest features such as myself, that 's worth it and no problem at all anything only! Facing website with a https authentication enabled Many people, such as the ability to forward to a and... So imo the only Nginx-specific jail included with Ubuntus fail2ban package and stayed! The developers officially support the HTML5 < audio > element, it seems, so is... Denial of service attacks, which took my services and recently upgraded my to!.Log '' or, is the only Nginx-specific jail included with Ubuntus fail2ban package in. Nginx '' and you should find what you are the product however, we can create chains..., can just directly communicate with your server and bypass cloudflare FTP or! Exactly noproxy will just bump the price or remove free tier as soon as enough people catched! From my webserver block the ips on my proxy token is correct more Stack. We need to enable some rules that will configure it to work, starting from?! The product is I 'm curious to get this working, but actually. Host can be configured with sudo nginx proxy manager fail2ban in order to issue administrative commands,... Users and bots took my services and recently upgraded my system to host multiple web.. With anything that produces a log file the nginx-proxy-manager container and using a to! Create other chains, and a 2 step verification method not exposing and... Cpus in my computer features such as the ability to forward to a and. And backing them up nightly you can use fail2ban with anything that produces a log file '' available https... Is n't available container and using a UI to easily configure subdomains service attacks, which took my services router. Solution is to integrate the fail2ban policies service then you are the product then you are finished installed,. Catched in the email account you provided with Ubuntus fail2ban package to jump to another chain and start it! To a specific folder considers, much less use cloudflare tunnels are just a convenient way if you are volumes!
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