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Update fail2ban documentation for new logging format

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Nick Fox 2018-12-26 12:07:16 -05:00
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README.md
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@ -451,27 +451,15 @@ Though this is unlikely to be required in small deployment, you can fine-tune so
### Fail2Ban Setup
Bitwarden_rs logs failed login attempts to stdout. We need to set this so the host OS can see these. Then we can setup Fail2Ban.
As of release 1.5.0, bitwarden_rs supports logging to file. See [Logging](#logging) above for information on how to set this up.
#### Logging Failed Login Attempts to Syslog
We need to set the logging driver to syslog so the host OS and Fail2Ban can see them.
After specifying the log file location, failed login attempts will appear in the logs in the following format:
If you are using docker commands, you will need to add: `--log-driver syslog --log-opt tag=$TAG` to your command.
If you are using docker-compose, add this to you yaml file:
```
bitwarden:
logging:
driver: "syslog"
options:
tag: "$TAG"
[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.
```
With the above settings in the docker-compose file. Any failed login attempts will look like this in your syslog file:
```
MMM DD hh:mm:ss server-hostname $TAG[773]: [YYYY-MM-DD][hh:mm:ss][bitwarden_rs::api::identity][ERROR] Username or password is incorrect. Try again. IP: XXX.XXX.XXX.XXX. Username: email@domain.com.
```
You can change the '$TAG' to anything you like. Just remember it because it will be in the Fail2Ban filter.
#### Fail2Ban Filter
@ -485,11 +473,9 @@ And add the following
before = common.conf
[Definition]
_daemon = $TAG
failregex = ^%(__prefix_line)s.*Username or password is incorrect\. Try again\. IP: <HOST>\. Username:.*$
failregex = ^.*Username or password is incorrect\. Try again\. IP: <HOST>\. Username:.*$
ignoreregex =
```
Dont forget to change the '$TAG' to what you set it as from above.
#### Fail2Ban Jail
@ -504,7 +490,8 @@ enabled = true
port = 80,443,8081
filter = bitwarden
action = iptables-allports[name=bitwarden]
logpath = /var/log/syslog
logpath = /path/to/bitwarden/log
backend = polling
maxretry = 3
bantime = 14400
findtime = 14400