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Deploy mailcow/mailcow-dockerized-docs to github.com/mailcow/mailcow-dockerized-docs.git:gh-pages
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<h1>IP bindings</h1>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Changing the binding does not affect source NAT. See <a href="https://mailcow.github.io/mailcow-dockerized-docs/firststeps-snat/">SNAT</a> for required steps.</p>
</div>
<h2 id="ipv4-binding">IPv4 binding<a class="headerlink" href="#ipv4-binding" title="Permanent link">&para;</a></h2>
<p>To adjust one or multiple IPv4 bindings, open <code>mailcow.conf</code> and edit one, multiple or all variables as per your needs:</p>
<div class="highlight"><pre><span></span><code># For technical reasons, http bindings are a bit different from other service bindings.
# You will find the following variables, separated by a bind address and its port:
# Example: HTTP_BIND=1.2.3.4
HTTP_PORT=80
HTTP_BIND=
HTTPS_PORT=443
HTTPS_BIND=
# Other services are bound by using the following format:
# SMTP_PORT=1.2.3.4:25 will bind SMTP to the IP 1.2.3.4 on port 25
# Important! Specifying an IPv4 address will skip all IPv6 bindings since Docker 20.x.
# doveadm, SQL as well as Solr are bound to local ports only, please do not change that, unless you know what you are doing.
SMTP_PORT=25
SMTPS_PORT=465
SUBMISSION_PORT=587
IMAP_PORT=143
IMAPS_PORT=993
POP_PORT=110
POPS_PORT=995
SIEVE_PORT=4190
DOVEADM_PORT=127.0.0.1:19991
SQL_PORT=127.0.0.1:13306
SOLR_PORT=127.0.0.1:18983
</code></pre></div>
<p>To apply your changes, run <code>docker-compose down</code> followed by <code>docker-compose up -d</code>.</p>
<h2 id="ipv6-binding">IPv6 binding<a class="headerlink" href="#ipv6-binding" title="Permanent link">&para;</a></h2>
<p>Changing IPv6 bindings is different from IPv4. Again, this has a technical background.</p>
<p>A <code>docker-compose.override.yml</code> file will be used instead of editing the <code>docker-compose.yml</code> file directly. This is to maintain updatability, as the <code>docker-compose.yml</code> file gets updated regularly and your changes will most likely be overwritten.</p>
<p>Edit to create a file <code>docker-compose.override.yml</code> with the following content. Its content will be merged with the productive <code>docker-compose.yml</code> file.</p>
<p>An imaginary IPv6 <strong>2a00:dead:beef::abc</strong> is given. The first suffix <code>:PORT1</code> defines the external port, while the second suffix <code>:PORT2</code> routes to the corresponding port inside the container and must not be changed.</p>
<div class="highlight"><pre><span></span><code>version: &#39;2.1&#39;
services:
dovecot-mailcow:
ports:
- &#39;2a00:dead:beef::abc:143:143&#39;
- &#39;2a00:dead:beef::abc:993:993&#39;
- &#39;2a00:dead:beef::abc:110:110&#39;
- &#39;2a00:dead:beef::abc:995:995&#39;
- &#39;2a00:dead:beef::abc:4190:4190&#39;
postfix-mailcow:
ports:
- &#39;2a00:dead:beef::abc:25:25&#39;
- &#39;2a00:dead:beef::abc:465:465&#39;
- &#39;2a00:dead:beef::abc:587:587&#39;
nginx-mailcow:
ports:
- &#39;2a00:dead:beef::abc:80:80&#39;
- &#39;2a00:dead:beef::abc:443:443&#39;
</code></pre></div>
<p>To apply your changes, run <code>docker-compose down</code> followed by <code>docker-compose up -d</code>.</p>
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