So, for you Sebastian it will be :
Use openssl given to you to make this manipations : - Open CMD windows with administrator right - cd C:\Program Files (x86)\stunnel
openssl.exe genrsa -aes128 -out mykey.key 4096 openssl.exe req -new -x509 -sha384 -days 365 -key mykey.key -verify -config stunnel.cnf -out cert.crt copy mycert.pem+cert.crt=mycert.pem
Ludo.