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a0ee472501
"Brief" summary/overview of changes. See the PR discussion or individual commits from the PR for more details.
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Only applies to the `docs/content/**` content (_and `setup` command_). `target/` and `test/` can be normalized at a later date.
* Normalize to `example.com`
- Domains normalized to `example.com`: `mywebserver.com`, `myserver.tld`, `domain.com`, `domain.tld`, `mydomain.net`, `my-domain.tld`, `my-domain.com`, `example.org`, `whoami.com`.
- Alternative domains normalized to `not-example.com`: `otherdomain.com`, `otherdomain.tld`, `domain2.tld`, `mybackupmx.com`, `whoareyou.org`.
- Email addresses normalized to `admin@example.com` (in `ssl.md`): `foo@bar.com`, `yourcurrentemail@gmail.com`, `email@email.com`, `admin@domain.tld`.
- Email addresses normalized to `external-account@gmail.com`: `bill@gates321boom.com`, `external@gmail.com`, `myemail@gmail.com`, `real-email-address@external-domain.com`.
- **`faq.md`:** A FAQ entry title with `sample.domain.com` changed to `subdomain.example.com`.
- **`mail-fetchmail.md`:** Config examples with FQDNs for `imap`/`pop3` used `example.com` domain for a third-party, changed to `gmail.com` as more familiar third-party/external MTA.
* Normalize config volume path
- Normalizing local config path references to `./docker-data/dms/config/`: `./config/`, `config/`, \``config`\`, `/etc/` (_volume mount src path prefix_).
- Normalize DMS volume paths to `docker-data/dms/mail-{data,state,log}`: `./mail`, `./mail-state` `./data/mail`, `./data/state`, `./data/logs`, `./data/maildata`, `./data/mailstate`, `./data/maillogs`, (_dropped/converted data volumes: `maildata`, `mailstate`_).
- Other docker images also adopt the `docker-data/{service name}/` prefix.
* `ssl.md` - Use `dms/custom-certs` where appropriate.
* Apply normalizations to README and example `docker-compose.yml`
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Common terms, sometimes interchangeably used or now invalid depending on context: `mail`, `mail container`, `mail server`, `mail-server`, `mailserver`,`docker-mailserver`, `Docker Mailserver`.
Rough transformations applied to most matches (_conditionally, depending on context_):
- 'Docker Mailserver' => '`docker-mailserver`'
- 'mail container' => '`docker-mailserver`' (_optionally retaining ' container'_)
- 'mail server' => 'mail-server' / '`docker-mailserver`'
- 'mail-server' => '`docker-mailserver`'
- 'mailserver' => 'mail-server' / '`docker-mailserver`'
Additionally I checked `docker run` (_plus `exec`, `logs`, etc, sub-commands_) and `docker-compose` commands. Often finding usage of `mail` instead of the expected `mailserver`
Additionally changes `mailserver` hostname in k8s to `mail` to align with other non-k8s examples.
---
* drive-by revisions
Mostly minor revisions or improvements to docs that aren't related to normalization effort.
72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
---
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title: 'Security | Fail2Ban'
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hide:
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- toc # Hide Table of Contents for this page
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---
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Fail2Ban is installed automatically and bans IP addresses for 3 hours after 3 failed attempts in 10 minutes by default.
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## Configuration files
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If you want to change this, you can easily edit our github example file: [`config/fail2ban-jail.cf`][github-file-f2bjail].
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You can do the same with the values from `fail2ban.conf`, e.g `dbpurgeage`. In that case you need to edit: [`config/fail2ban-fail2ban.cf`][github-file-f2bconfig].
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The configuration files need to be located at the root of the `/tmp/docker-mailserver/` volume bind (usually `./docker-data/dms/config/:/tmp/docker-mailserver/`).
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This following configuration files from `/tmp/docker-mailserver/` will be copied during container startup.
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- `fail2ban-jail.cf` -> `/etc/fail2ban/jail.d/user-jail.local`
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- `fail2ban-fail2ban.cf` -> `/etc/fail2ban/fail2ban.local`
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### Docker-compose config
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Example configuration volume bind:
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```yaml
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volumes:
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- ./docker-data/dms/config/:/tmp/docker-mailserver/
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```
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!!! attention
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`docker-mailserver` must be launched with the `NET_ADMIN` capability in order to be able to install the iptable rules that actually ban IP addresses.
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Thus either include `--cap-add=NET_ADMIN` in the `docker run` command, or the equivalent in `docker-compose.yml`:
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```yaml
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cap_add:
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- NET_ADMIN
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```
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If you don't you will see errors the form of:
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```log
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iptables -w -X f2b-postfix -- stderr: "getsockopt failed strangely: Operation not permitted\niptables v1.4.21: can't initialize iptabl
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es table `filter': Permission denied (you must be root)\nPerhaps iptables or your kernel needs to be upgraded.\niptables v1.4.21: can'
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t initialize iptables table `filter': Permission denied (you must be root)\nPerhaps iptables or your kernel needs to be upgraded.\n"
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2016-06-01 00:53:51,284 fail2ban.action [678]: ERROR iptables -w -D INPUT -p tcp -m multiport --dports smtp,465,submission -
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j f2b-postfix
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```
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## Manage bans
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You can also manage and list the banned IPs with the [`setup.sh`][docs-setupsh] script.
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### List bans
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```sh
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./setup.sh debug fail2ban
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```
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### Un-ban
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Here `192.168.1.15` is our banned IP.
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```sh
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./setup.sh debug fail2ban unban 192.168.1.15
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```
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[docs-setupsh]: ../setup.sh.md
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[github-file-f2bjail]: https://github.com/docker-mailserver/docker-mailserver/blob/master/config/fail2ban-jail.cf
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[github-file-f2bconfig]: https://github.com/docker-mailserver/docker-mailserver/blob/master/config/fail2ban-fail2ban.cf
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