https://docs.goshs.de/en/usage/tls/own-cert/index.html Provide own certificate and key You can provide your own certificate and key using -s -sk <key> -sc <certificate>. $ goshs -s -sk key.pem -sc cert.pem INFO [2024-07-04 18:01:46] Download embedded file at: /example.txt?embedded INFO [2024-07-04 18:01:46] Serving on interface lo bound to 127.0.0.1:8000 INFO [2024-07-04 18:01:46] Serving on interface eth0 bound to 10.137.0.27:8000 INFO [2024-07-04 18:01:46] Serving HTTPS from /home/user with ssl enabled server key: key.pem, server cert: cert.pem INFO [2024-07-04 18:01:46] You provided a certificate and might want to check the fingerprint nonetheless INFO [2024-07-04 18:01:46] SHA-256 Fingerprint: BC 8B 2A C5 86 16 6A 19 08 BD 10 19 B2 A6 87 3B 42 6A 44 00 5B 76 10 5F 19 96 79 D6 AF 61 5F EE INFO [2024-07-04 18:01:46] SHA-1 Fingerprint: 76 74 6A 3A AD C1 27 39 CC BC 6C 50 9B 6B C9 EB 7A 01 69 09 Warning Notice that this only works with keys that have no passphrases. You could convert your key like: openssl rsa -in [original.key] -out [new.key]. Hugo en-US