Generate OpenSSL key for webapp

openssl req -x509 -out ssl.crt -keyout ssl.key \
  -newkey rsa:2048 -nodes -sha256 \
  -subj '/CN=localhost' -extensions EXT -config <( \
   printf "[dn]\nCN=localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth")

Node.js Error: self signed certificate - önaláírt tanúsítvány hiba

node cli1.js
events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: self signed certificate
    at Error (native)
    at TLSSocket.<anonymous> (_tls_wrap.js:1017:38)
    at emitNone (events.js:67:13)
    at TLSSocket.emit (events.js:166:7)
    at TLSSocket._init.ssl.onclienthello.ssl.oncertcb.TLSSocket._finishInit (_tls_wrap.js:582:8)
    at TLSWrap.ssl.onclienthello.ssl.oncertcb.ssl.onnewsession.ssl.onhandshakedone (_tls_wrap.js:424:38)

Önaláírt tanúsítványok engedélyezése:

http2.globalAgent = new http2.Agent({
  // Accept self-signed certificates
  rejectUnauthorized: false
});

SSL kulcs készítése (4096-bit ajánlott)

openssl req -newkey rsa:4096 -keyout private_key1.key -out private_key1.csr
openssl rsa -in private_key1.key -out private_key1.priv
cat private_key1.csr
cat private_key1.priv

Error code: ssl_error_no_cypher_overlap

CIB problem in Firefox - Error code: ssl_error_no_cypher_overlap

Open about:config
Set to false:
security.ssl3.rsa_des_ede3_sha