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[Nginx] only bind IPv6 default_server when ENABLE_IPV6 is set

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The HTTP-to-HTTPS redirect server block bound `listen [::]:{{ HTTP_PORT }}
default_server` unconditionally, while every other IPv6 listen directive in
this template is guarded by `{% if ENABLE_IPV6 %}`. On hosts where IPv6 is
disabled at the kernel level, nginx cannot bind `::` and fails to start.

This only triggers when HTTP_REDIRECT is enabled and ENABLE_IPV6 is false,
which is why it survives testing with ENABLE_IPV6=false alone.

Guard the directive like the other six IPv6 listeners in the template.

Refs #7296

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Stephen Ritz
2026-07-14 14:54:28 -07:00
parent c1d75cf808
commit 7dab6c63d1
1 changed files with 2 additions and 0 deletions
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data/conf/nginx/templates/nginx.conf.j2
+2
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@@ -47,7 +47,9 @@ http {
server {
root /web;
listen {{ HTTP_PORT }} default_server;
{% if ENABLE_IPV6 %}
listen [::]:{{ HTTP_PORT }} default_server;
{%endif%}
server_name {{ MAILCOW_HOSTNAME }} autodiscover.* autoconfig.* mta-sts.* {{ ADDITIONAL_SERVER_NAMES | join(' ') }};