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Multiplex HTTPS, IMAP and SMTP on port 443

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Services are distinguished based on ALPN.
For example,
    openssl s_client -connect example.org:443 -alpn smtp
gives SMTP connection and
    openssl s_client -connect example.org:443 -alpn imap
gives IMAP connection.
This commit is contained in:
link2xt
2024-07-11 05:31:02 +00:00
parent 180cfb3951
commit 283045dc4a
4 changed files with 38 additions and 6 deletions
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3
README.md
View File

@@ -155,7 +155,8 @@ While this file is present, account creation will be blocked.
[Postfix](http://www.postfix.org/) listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
[Dovecot](https://www.dovecot.org/) listens on ports 143 (imap) and 993 (imaps).
[nginx](https://www.nginx.com/) listens on port 443 (https).
[nginx](https://www.nginx.com/) listens on port 8443 (https-alt) and 443 (https).
Port 443 multiplexes HTTPS, IMAP and SMTP using ALPN to redirect connections to ports 8443, 465 or 993.
[acmetool](https://hlandau.github.io/acmetool/) listens on port 80 (http).
Delta Chat apps will, however, discover all ports and configurations

2
cmdeploy/src/cmdeploy/__init__.py
View File

@@ -534,7 +534,7 @@ def deploy_chatmail(config_path: Path) -> None:
apt.packages(
name="Install nginx",
packages=["nginx"],
packages=["nginx", "libnginx-mod-stream"],
)
apt.packages(

14
cmdeploy/src/cmdeploy/nginx/autoconfig.xml.j2
View File

@@ -19,6 +19,13 @@
<authentication>password-cleartext</authentication>
<username>%EMAILADDRESS%</username>
</incomingServer>
<incomingServer type="imap">
<hostname>{{ config.domain_name }}</hostname>
<port>443</port>
<socketType>SSL</socketType>
<authentication>password-cleartext</authentication>
<username>%EMAILADDRESS%</username>
</incomingServer>
<outgoingServer type="smtp">
<hostname>{{ config.domain_name }}</hostname>
<port>465</port>
@@ -33,5 +40,12 @@
<authentication>password-cleartext</authentication>
<username>%EMAILADDRESS%</username>
</outgoingServer>
<outgoingServer type="smtp">
<hostname>{{ config.domain_name }}</hostname>
<port>443</port>
<socketType>SSL</socketType>
<authentication>password-cleartext</authentication>
<username>%EMAILADDRESS%</username>
</outgoingServer>
</emailProvider>
</clientConfig>

25
cmdeploy/src/cmdeploy/nginx/nginx.conf.j2
View File

@@ -1,3 +1,5 @@
load_module modules/ngx_stream_module.so;
user www-data;
worker_processes auto;
pid /run/nginx.pid;
@@ -8,6 +10,21 @@ events {
# multi_accept on;
}
stream {
map $ssl_preread_alpn_protocols $proxy {
default 127.0.0.1:8443;
~\bsmtp\b 127.0.0.1:submissions;
~\bimap\b 127.0.0.1:imaps;
}
server {
listen 443;
listen [::]:443;
proxy_pass $proxy;
ssl_preread on;
}
}
http {
sendfile on;
tcp_nopush on;
@@ -26,8 +43,8 @@ http {
gzip on;
server {
listen 443 ssl default_server;
listen [::]:443 ssl default_server;
listen 8443 ssl default_server;
listen [::]:8443 ssl default_server;
root /var/www/html;
@@ -78,8 +95,8 @@ http {
# Redirect www. to non-www
server {
listen 443 ssl;
listen [::]:443 ssl;
listen 8443 ssl;
listen [::]:8443 ssl;
server_name www.{{ config.domain_name }};
return 301 $scheme://{{ config.domain_name }}$request_uri;
access_log syslog:server=unix:/dev/log,facility=local7;