Better indentation and fixed code blocks
JuanM04
parent
cd54372ca0
commit
4a81706952
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@ -16,24 +16,24 @@ Setup Fail2ban will prevent attackers to brute force your vault logins. This is
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- [SELinux Problems](#selinux-problems)
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## Pre-requisite
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- Commands below are using `vi`. The basics can be found [there](https://pc.net/resources/commands/vi). However, you can use whatever text editor you want.
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- Filenames are at the top of each code block.
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- From Release 1.5.0, Bitwarden_rs supports logging to file. Please set this up : [[Logging|logging]]
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- Try to log to web vault with a false account and check the log files for following format
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````
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[YYYY-MM-DD hh:mm:ss][bitwarden_rs::api::identity][ERROR] Username or password is incorrect. Try again. IP: XXX.XXX.XXX.XXX. Username: email@domain.com.
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````
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```
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[YYYY-MM-DD hh:mm:ss][bitwarden_rs::api::identity][ERROR] Username or password is incorrect. Try again. IP: XXX.XXX.XXX.XXX. Username: email@domain.com.
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```
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## Installation
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### Debian / Ubuntu / Raspberry Pi OS
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```
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sudo apt-get install fail2ban -y
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```bash
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sudo apt-get install fail2ban -y
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```
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### Fedora / Centos
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EPEL repository is necessary (CentOS 7)
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```
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sudo yum install epel-release
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sudo yum install fail2ban -y
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```bash
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sudo yum install epel-release
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sudo yum install fail2ban -y
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```
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### Synology DSM
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@ -47,181 +47,186 @@ With Synology, a bit more work is needed for various reasons. The full solution
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Therefore, we will use Fail2ban in a Docker container. [Crazy-max/docker-fail2ban](https://github.com/crazy-max/docker-fail2ban) provides a good solution and the Synology's Docker GUI will be ignored. From command line through SSH, here the steps. As a convention `volumeX` is to be adapted to your Synology's config.
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0. Get root
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````
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sudo -i
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````
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```bash
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sudo -i
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```
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1. Creating persistent folders
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````
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mkdir -p /volumeX/docker/fail2ban/action.d/
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mkdir -p /volumeX/docker/fail2ban/jail.d/
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mkdir -p /volumeX/docker/fail2ban/filter.d/
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````
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```bash
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mkdir -p /volumeX/docker/fail2ban/action.d/
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mkdir -p /volumeX/docker/fail2ban/jail.d/
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mkdir -p /volumeX/docker/fail2ban/filter.d/
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```
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2. Replace `REJECT` by `DROP` blocktype
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````
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vi /volumeX/docker/fail2ban/action.d/iptables-common.local
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````
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Copy and paste the following content
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````
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[Init]
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blocktype = DROP
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[Init?family=inet6]
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blocktype = DROP
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````
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3. Create docker-compose file
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````
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vi /volumeX/docker/fail2ban/docker-compose.yml
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````
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Copy and paste the following content
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````
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version: '3'
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services:
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fail2ban:
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container_name: fail2ban
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restart: always
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image: crazymax/fail2ban:latest
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environment:
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- TZ=Europe/Paris
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- F2B_DB_PURGE_AGE=30d
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- F2B_LOG_TARGET=/data/fail2ban.log
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- F2B_LOG_LEVEL=INFO
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- F2B_IPTABLES_CHAIN=INPUT
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```INI
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# /volumeX/docker/fail2ban/action.d/iptables-common.local
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volumes:
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- /volumeX/docker/fail2ban:/data
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- /volumeX/docker/bw-data:/bitwarden:ro
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[Init]
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blocktype = DROP
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[Init?family=inet6]
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blocktype = DROP
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```
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network_mode: "host"
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3. Create `docker-compose` file
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```yml
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# /volumeX/docker/fail2ban/docker-compose.yml
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version: '3'
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services:
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fail2ban:
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container_name: fail2ban
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restart: always
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image: crazymax/fail2ban:latest
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environment:
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- TZ=Europe/Paris
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- F2B_DB_PURGE_AGE=30d
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- F2B_LOG_TARGET=/data/fail2ban.log
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- F2B_LOG_LEVEL=INFO
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- F2B_IPTABLES_CHAIN=INPUT
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volumes:
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- /volumeX/docker/fail2ban:/data
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- /volumeX/docker/bw-data:/bitwarden:ro
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network_mode: "host"
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privileged: true
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cap_add:
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- NET_ADMIN
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- NET_RAW
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```
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privileged: true
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cap_add:
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- NET_ADMIN
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- NET_RAW
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````
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4. Start the container using command line
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````
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cd /volumeX/docker/fail2ban
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docker-compose up -d
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````
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```bash
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cd /volumeX/docker/fail2ban
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docker-compose up -d
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```
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You should see the container running in Synology's Docker GUI. You will have to reload after configuring the filters and jails
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## Setup for web vault
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As a convention, `path_f2b` means the path needed for Fail2ban to work. This depends on your system. E.g. on Synology, we are talking about `/volumeX/docker/fail2ban/` where on some other systems we are talking about `/etc/fail2ban/`
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### Filter
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Create and fill the following file
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````
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vi path_f2b/filter.d/bitwarden_rs.local
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````
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Copy and paste the following content
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````
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[INCLUDES]
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before = common.conf
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[Definition]
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failregex = ^.*Username or password is incorrect\. Try again\. IP: <ADDR>\. Username:.*$
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ignoreregex =
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````
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Create and fill the following file
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```INI
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# path_f2b/filter.d/bitwarden_rs.local
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[INCLUDES]
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before = common.conf
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[Definition]
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failregex = ^.*Username or password is incorrect\. Try again\. IP: <ADDR>\. Username:.*$
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ignoreregex =
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```
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**Tip:** If you get the following error message in `fail2ban.log` (CentOS 7, Fail2Ban v0.9.7)
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`fail2ban.filter [5291]: ERROR No 'host' group in '^.*Username or password is incorrect\. Try again\. IP: <ADDR>\. Username:.*$'`
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Please Use `<HOST>` instead of `<ADDR>` in `bitwarden_rs.local`
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**Tip:** If you see 127.0.0.1 as the IP address of failed logins in bitwarden.log, then you're probably using a reverse proxy and fail2ban won't work correctly:
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````
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```
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[YYYY-MM-DD hh:mm:ss][bitwarden_rs::api::identity][ERROR] Username or password is incorrect. Try again. IP: 127.0.0.1. Username: email@example.com.
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````
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```
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To remedy this, forward the true remote address to bitwarden_rs via the X-Real-IP header. How to do this varies depending on the proxy you use. For example, in Caddy 2.x, when you define the reverse-proxy, define `header_up X-Real-IP {remote_host}`. See [Proxy examples](https://github.com/dani-garcia/bitwarden_rs/wiki/Proxy-examples) for more info.
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### Jail
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Create and fill the following file
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````
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vi path_f2b/jail.d/bitwarden_rs.local
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````
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Copy and paste the following content
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````
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[bitwarden_rs]
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enabled = true
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port = 80,443,8081
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filter = bitwarden_rs
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banaction = %(banaction_allports)s
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logpath = /path/to/bitwarden.log
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maxretry = 3
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bantime = 14400
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findtime = 14400
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````
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```INI
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# path_f2b/jail.d/bitwarden_rs.local
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[bitwarden_rs]
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enabled = true
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port = 80,443,8081
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filter = bitwarden_rs
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banaction = %(banaction_allports)s
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logpath = /path/to/bitwarden.log
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maxretry = 3
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bantime = 14400
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findtime = 14400
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```
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Note: Docker uses the FORWARD chain instead of the default INPUT chain. Therefore replace the `banaction` line with the following `action` when using Docker:
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```INI
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action = iptables-allports[name=bitwarden_rs, chain=FORWARD]
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```
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action = iptables-allports[name=bitwarden_rs, chain=FORWARD]
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```
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**NOTE**:
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Do not use this if you use a reverse proxy before Docker container. If proxy, like apache2 or nginx is used, use the ports of the proxy and do not use chain=FORWARD, only when using Docker **without** proxy!
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Do not use this if you use a reverse proxy before Docker container. If proxy, like apache2 or nginx is used, use the ports of the proxy and do not use `chain=FORWARD`, only when using Docker **without** proxy!
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**NOTE on the NOTE above**:
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That's at least not true for running on Docker (CentOS 7) with caddy as reverse proxy. chain=FORWARD is absolutely fine and working with caddy as reverse proxy.
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That's at least not true for running on Docker (CentOS 7) with caddy as reverse proxy. `chain=FORWARD` is absolutely fine and working with caddy as reverse proxy.
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Reload fail2ban for changes to take effect:
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`sudo systemctl reload fail2ban`
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```bash
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sudo systemctl reload fail2ban
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```
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Feel free to change the options as you see fit.
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## Setup for admin page
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If you've enabled the admin console by setting the `ADMIN_TOKEN` environment variable, you can prevent an attacker brute-forcing the admin token using Fail2Ban. The process is the same as for the web vault.
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If you've enabled the admin console by setting the `ADMIN_TOKEN` environment variable, you can prevent an attacker from brute-forcing the admin token using Fail2Ban. The process is the same as for the web vault.
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### Filter
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Create and fill the following file
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````
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vi path_f2b/filter.d/bitwarden-admin.local
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````
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Copy and paste the following content
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````
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[INCLUDES]
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before = common.conf
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[Definition]
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failregex = ^.*Invalid admin token\. IP: <ADDR>.*$
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ignoreregex =
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````
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Create and fill the following file
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```INI
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# path_f2b/filter.d/bitwarden-admin.local
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[INCLUDES]
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before = common.conf
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[Definition]
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failregex = ^.*Invalid admin token\. IP: <ADDR>.*$
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ignoreregex =
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```
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### Jail
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Create and fill the following file
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````
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vi path_f2b/jail.d/bitwarden_rs-admin.local
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````
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Copy and paste the following content
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````
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[bitwarden_rs-admin]
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enabled = true
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port = 80,443
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filter = bitwarden_rs-admin
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banaction = %(banaction_allports)s
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logpath = /path/to/bitwarden.log
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maxretry = 3
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bantime = 14400
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findtime = 14400
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````
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```INI
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# path_f2b/jail.d/bitwarden_rs-admin.local
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[bitwarden_rs-admin]
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enabled = true
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port = 80,443
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filter = bitwarden_rs-admin
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banaction = %(banaction_allports)s
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logpath = /path/to/bitwarden.log
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maxretry = 3
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bantime = 14400
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findtime = 14400
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```
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Note: Docker uses the FORWARD chain instead of the default INPUT chain. Therefore replace the `banaction` line with the following `action` when using Docker:
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```INI
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action = iptables-allports[name=bitwarden_rs, chain=FORWARD]
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```
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action = iptables-allports[name=bitwarden_rs, chain=FORWARD]
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```
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Reload fail2ban for changes to take effect:
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`sudo systemctl reload fail2ban`
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```bash
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sudo systemctl reload fail2ban
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```
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## Testing Fail2Ban
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Now just try to login to bitwarden using any email (it doesn't have to be a valid email, just an email format)
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If it works correctly and your IP is banned, you can unban the IP by running:
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Without Docker:
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`sudo fail2ban-client set bitwarden_rs unbanip XX.XX.XX.XX`
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```bash
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# With Docker
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sudo docker exec -t fail2ban fail2ban-client set bitwarden_rs unbanip XX.XX.XX.XX
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# Without Docker
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sudo fail2ban-client set bitwarden_rs unbanip XX.XX.XX.XX
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```
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With Docker:
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`sudo docker exec -t fail2ban fail2ban-client set bitwarden_rs unbanip XX.XX.XX.XX`
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If Fail2Ban does not appear to be functioning, verify that the path to the Bitwarden log file is correct. For Docker: If the specified log file is not being generated and/or updated, make sure the `EXTENDED_LOGGING` env variable is set to true (which is default) and that the path to the log file is the path inside the Docker (when you use /bw-data/:/data/ the log file should be in /data/... to be outside the container).
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If Fail2Ban does not appear to be functioning, verify that the path to the Bitwarden log file is correct. For Docker: If the specified log file is not being generated and/or updated, make sure the `EXTENDED_LOGGING` env variable is set to true (which is default) and that the path to the log file is the path inside the Docker (when you use `/bw-data/:/data/` the log file should be in `/data/...` to be outside the container).
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Also verify that the timezone of the Docker container matches the timezone of the host. Check this by comparing the time shown in the logfile with the host OS time. If they differ, there are various ways to fix this. One option is to start Docker with the option `-e "TZ=<timezone>"`. A list of valid timezones is [here](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) (eg. `-e "TZ=Australia/Melbourne"`)
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