132 lines
3.9 KiB
Markdown
132 lines
3.9 KiB
Markdown
# SSL (and: How to use Let's Encrypt)
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mailcow dockerized comes with a snakeoil CA "mailcow" and a server certificate in `data/assets/ssl`. Please use your own trusted certificates.
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mailcow uses 3 domain names that should be covered by your new certificate:
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- ${MAILCOW_HOSTNAME}
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- autodiscover.*example.org*
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- autoconfig.*example.org*
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**Obtain multi-SAN certificate by Let's Encrypt**
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This is just an example of how to obtain certificates with certbot. There are several methods!
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1. Get the certbot client:
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```
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wget https://dl.eff.org/certbot-auto -O /usr/local/sbin/certbot && chmod +x /usr/local/sbin/certbot
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```
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2. Make sure you set `HTTP_BIND=0.0.0.0` in `mailcow.conf` or setup a reverse proxy to enable connections to port 80. If you changed HTTP_BIND, then restart Nginx: `docker-compose restart nginx-mailcow`.
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3. Request the certificate with the webroot method:
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```
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cd /path/to/git/clone/mailcow-dockerized
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source mailcow.conf
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certbot certonly \
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--webroot \
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-w ${PWD}/data/web \
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-d ${MAILCOW_HOSTNAME} \
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-d autodiscover.example.org \
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-d autoconfig.example.org \
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--email you@example.org \
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--agree-tos
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```
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4. Create hard links to the full path of the new certificates. Assuming you are still in the mailcow root folder:
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```
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mv data/assets/ssl/cert.{pem,pem.backup}
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mv data/assets/ssl/key.{pem,pem.backup}
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ln $(readlink -f /etc/letsencrypt/live/${MAILCOW_HOSTNAME}/fullchain.pem) data/assets/ssl/cert.pem
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ln $(readlink -f /etc/letsencrypt/live/${MAILCOW_HOSTNAME}/privkey.pem) data/assets/ssl/key.pem
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```
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5. Restart affected containers:
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```
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docker-compose restart postfix-mailcow dovecot-mailcow nginx-mailcow
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```
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When renewing certificates, run the last two steps (link + restart) as post-hook in a script.
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# Rspamd Web UI
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At first you may want to setup Rspamds web interface which provides some useful features and information.
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1. Generate a Rspamd controller password hash:
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```
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docker-compose exec rspamd-mailcow rspamadm pw
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```
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2. Replace the default hash in `data/conf/rspamd/override.d/worker-controller.inc` by your newly generated:
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```
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enable_password = "myhash";
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```
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3. Restart rspamd:
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```
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docker-compose restart rspamd-mailcow
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```
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Open https://${MAILCOW_HOSTNAME}/rspamd in a browser and login!
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# Optional: Reverse proxy
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You don't need to change the Nginx site that comes with mailcow: dockerized.
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mailcow: dockerized trusts the default gateway IP 172.22.1.1 as proxy. This is very important to control access to Rspamd's web UI.
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Make sure you change HTTP_BIND and HTTPS_BIND in `mailcow.conf` to a local address and set the ports accordingly, for example:
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```
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HTTP_BIND=127.0.0.1
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HTTP_PORT=8080
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HTTPS_PORT=127.0.0.1
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HTTPS_PORT=8443
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```
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Recreate affected containers by running `docker-compose up -d`.
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Configure your local webserver as reverse proxy:
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**Apache 2.4**
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```
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<VirtualHost *:443>
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ServerName mail.example.org
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ServerAlias autodiscover.example.org
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ServerAlias autoconfig.example.org
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[...]
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# You should proxy to a plain HTTP session to offload SSL processing
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ProxyPass / http://127.0.0.1:8080
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ProxyPassReverse / http://127.0.0.1:8080
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ProxyPreserveHost On
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your-ssl-configuration-here
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[...]
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# If you plan to proxy to a HTTPS host:
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#SSLProxyEngine On
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# If you plan to proxy to an untrusted HTTPS host:
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#SSLProxyVerify none
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#SSLProxyCheckPeerCN off
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#SSLProxyCheckPeerName off
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#SSLProxyCheckPeerExpire off
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</VirtualHost>
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```
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**Nginx**
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```
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server {
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listen 443;
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server_name mail.example.org autodiscover.example.org autoconfig.example.org;
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[...]
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your-ssl-configuration-here
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location / {
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proxy_pass http://127.0.0.1:8080;
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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}
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[...]
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}
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```
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