Please use this template for troubleshooting questions.
My issue: nginx loads the first domain’s certificate when visiting my second domain.
How I encountered the problem: i have tranzhex.net’s certificate set to tranz.crt and tranz.key files, but cloudflare and me sees that nginx is serving certificate for 7.tiffany.eu.org instead.
Solutions I’ve tried: i assume is either permission or cipher issue, but neither the solutions i remember out of my head works
Version of NGINX or NGINX adjacent software (e.g. NGINX Gateway Fabric): nginx 1.29.2
Deployment environment: docker 28.2
Minimal NGINX config to reproduce your issue (preferably running on https://tech-playground.com/playgrounds/nginx for ease of debugging, and if not as a code block): (Tip → Run nginx -T to print your entire NGINX config to your terminal.)
tiffany@7:~$ sudo docker exec huohuo nginx -T
[sudo] password for tiffany:
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
# configuration file /etc/nginx/nginx.conf:
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log notice;
pid /run/nginx.pid;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
#tcp_nopush on;
keepalive_timeout 65;
#gzip on;
include /etc/nginx/conf.d/*.conf;
}
# configuration file /etc/nginx/mime.types:
types {
text/html html htm shtml;
text/css css;
text/xml xml;
image/gif gif;
image/jpeg jpeg jpg;
application/javascript js;
application/atom+xml atom;
application/rss+xml rss;
text/mathml mml;
text/plain txt;
text/vnd.sun.j2me.app-descriptor jad;
text/vnd.wap.wml wml;
text/x-component htc;
image/avif avif;
image/png png;
image/svg+xml svg svgz;
image/tiff tif tiff;
image/vnd.wap.wbmp wbmp;
image/webp webp;
image/x-icon ico;
image/x-jng jng;
image/x-ms-bmp bmp;
font/woff woff;
font/woff2 woff2;
application/java-archive jar war ear;
application/json json;
application/mac-binhex40 hqx;
application/msword doc;
application/pdf pdf;
application/postscript ps eps ai;
application/rtf rtf;
application/vnd.apple.mpegurl m3u8;
application/vnd.google-earth.kml+xml kml;
application/vnd.google-earth.kmz kmz;
application/vnd.ms-excel xls;
application/vnd.ms-fontobject eot;
application/vnd.ms-powerpoint ppt;
application/vnd.oasis.opendocument.graphics odg;
application/vnd.oasis.opendocument.presentation odp;
application/vnd.oasis.opendocument.spreadsheet ods;
application/vnd.oasis.opendocument.text odt;
application/vnd.openxmlformats-officedocument.presentationml.presentation
pptx;
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
xlsx;
application/vnd.openxmlformats-officedocument.wordprocessingml.document
docx;
application/vnd.wap.wmlc wmlc;
application/wasm wasm;
application/x-7z-compressed 7z;
application/x-cocoa cco;
application/x-java-archive-diff jardiff;
application/x-java-jnlp-file jnlp;
application/x-makeself run;
application/x-perl pl pm;
application/x-pilot prc pdb;
application/x-rar-compressed rar;
application/x-redhat-package-manager rpm;
application/x-sea sea;
application/x-shockwave-flash swf;
application/x-stuffit sit;
application/x-tcl tcl tk;
application/x-x509-ca-cert der pem crt;
application/x-xpinstall xpi;
application/xhtml+xml xhtml;
application/xspf+xml xspf;
application/zip zip;
application/octet-stream bin exe dll;
application/octet-stream deb;
application/octet-stream dmg;
application/octet-stream iso img;
application/octet-stream msi msp msm;
audio/midi mid midi kar;
audio/mpeg mp3;
audio/ogg ogg;
audio/x-m4a m4a;
audio/x-realaudio ra;
video/3gpp 3gpp 3gp;
video/mp2t ts;
video/mp4 mp4;
video/mpeg mpeg mpg;
video/quicktime mov;
video/webm webm;
video/x-flv flv;
video/x-m4v m4v;
video/x-mng mng;
video/x-ms-asf asx asf;
video/x-ms-wmv wmv;
video/x-msvideo avi;
}
# configuration file /etc/nginx/conf.d/critter.conf:
server {
server_name 7.tiffany.eu.org;
server_name 2a12-5e40-1-6dff-c13f-fe36-19c3-e562.sslip.io;
server_name 91-239-208-63.sslip.io;
server_name 91-239-208-63.nip.io;
server_name 5befd03f.nip.io;
server_name 91.239.208.63.16clouds.com;
listen 443 ssl;
listen [::]:443 ssl;
http2 on;
ssl_certificate /etc/letsencrypt/live/7.tiffany.eu.org/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/7.tiffany.eu.org/privkey.pem;
root /var/www/html;
index index.htm;
add_header X-Robots-Tag noindex;
}
server {
server_name 7.tiffany.eu.org;
server_name 2a12-5e40-1-6dff-c13f-fe36-19c3-e562.sslip.io;
server_name 91-239-208-63.sslip.io;
server_name 91-239-208-63.nip.io;
server_name 5befd03f.nip.io;
server_name 91.239.208.63.16clouds.com;
listen 80;
listen [::]:80;
return 301 https://$host$request_uri;
}
# configuration file /etc/nginx/conf.d/tranz.conf:
server {
server_name tranzhex.net;
listen 443 ssl;
http2 on;
ssl_certificate /etc/letsencrypt/tranz.crt;
ssl_certificate_key /etc/letsencrypt/tranz.key;
location / {
proxy_pass http://feixiao;
}
location /guinaifen/ {
proxy_pass https://sushang:9443/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
location /live {
proxy_pass http://64.31.10.126:7024;
}
}
NGINX access/error log: (Tip → You can usually find the logs in the /var/log/nginx directory.)
(last 3 lines, notice there's no entry from cloudflare IP)
116.203.135.255 - - [11/Oct/2025:11:34:13 +0000] "GET / HTTP/2.0" 200 2 "-" "Mozilla/5.0 (compatible; monibot/1.0; +https://monibot.io)" "-"
184.105.247.254 - - [11/Oct/2025:11:35:32 +0000] "GET / HTTP/1.1" 200 2 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0" "-"
116.203.135.255 - - [11/Oct/2025:11:39:16 +0000] "GET / HTTP/2.0" 200 2 "-" "Mozilla/5.0 (compatible; monibot/1.0; +https://monibot.io)" "-"
tell me what to do next, thanks.
