3CX Nginx Conf files Malformed

[tudornet]

Hello

Not sure what the hell is going on, SSL cert expired, overwrote existing SSL key and cert with the new files and Nginx would not restart complaining of malformed ngix.conf, 40-common.conf, shared-headers.conf

These files have not been touched!

Any advice on how to fix? 3CX is down.

 

[tudornet]

Got 3cx back up and running by fixing the malformed files, anyway, the files have been overwritten again since its up and running and again malformed......if I need to do a restart I will need to fix the files AGAIN.

 

[tudornet]

2026/10/21 23:34:43 [emerg] 2682#0: invalid number of the map parameters in /etc/nginx/sites-enabled/3cxpbx:3
nginx: configuration file /etc/nginx/nginx.conf test failed
root@pbx:/var/lib/3cxpbx/Instance1/Bin/Cert#

 

[Guillaume Bourgeois]

Hi,

Are you using a custom FQDN, or a 3CX-provided FQDN?

If custom, Are you using Certbot or another automated SSL certificate renewal process?

If you’re using Certbot with the --nginx plugin, that could explain the issue, as it may modify Nginx configuration files managed by 3CX.

I would recommend using certbot certonly instead, from a separate machine, and deploying only the certificate and private key to 3CX without modifying its Nginx configuration.