NetWorker: Generování CSR pro SSL s alternativním názvem předmětu SAN

1. Vytvořte soubor na libovolném linuxovém hostiteli.

vi server_cert.cnf

2. Vložte níže uvedený obsah do server_cert.cnf .

[req]
distinguished_name = req_distinguished_name
req_extensions = req_ext
prompt = no

[req_distinguished_name]
C   = 
ST  = 
L   = 
O   = 
OU  = 
CN  = 

[req_ext]
subjectAltName = @alt_names

[alt_names]
DNS.1 = 
DNS.2 = 
DNS.3 =
IP.1 =
IP.2 =
email.1 = 

3. Po vytvoření výše uvedené šablony zadejte informace specifické pro dané prostředí. Pokud potřebujete pomoc s generováním CSR, obraťte se na správce domény. 

Country (C): The two-letter ISO code(* see link below)  for the country where the organization is located.

State/County/Region (ST): The state/region where the organization is located.

Locality (L): The city where the organization is located.

Organization Name (O): Usually the legal name of a company or entity and should include any suffixes such as Ltd., Inc., or Corp.
Organizational Unit (OU): Internal organization department/division name.

Common Name (CN): The fully or qualified domain name (FQDN) of the server based on the hostname available on the nsrla of the host.

Clarified SAN Guidance : It is important to include the FQDN as DNS.1. Add the short hostname and any other aliases or IP addresses as needed to cover all valid ways the host may be accessed. 

DNS.1: Mandatory. Always set to the full FQDN of the host (e.g., server.company.com).

DNS.2: Recommended. Short hostname (e.g., server).

DNS.3: Optional. Additional FQDN, short name, or IP address — use this for aliases, VIPs, or any other name that might resolve to the same server.

email.x: Optional. Include if required by your CA or if you want the cert to bind to an email identity.

IP.x: Optional. Use IP.x only when you want clients to connect directly to the IP and still trust the cert. If you don’t add IP.x and someone connects to https://192.168.1.10 → the SSL check will fail because the cer

* Dvoupísmenný kód ISO pro zemi nebo oblast, kde se organizace nachází.

Podle potřeby přidejte nebo odeberte položky DNS.x a IP.x.

Příklad:

[req]
distinguished_name = req_distinguished_name
req_extensions = req_ext
prompt = no
[req_distinguished_name]
C   = US
ST  = Texas
L   = Round Rock
O   = Dell Technologies Inc.
OU  = Data Protection Team
CN  = server.fqdn.example.com    # Common Name - must match primary FQDN

# ================================
# Extensions for SAN
# ================================
[ req_ext ]
subjectAltName = @alt_names

[ alt_names ]
# DNS.1: Mandatory — fully qualified domain name (FQDN)
DNS.1 = server.fqdn.example.com

# DNS.2: Recommended — short hostname (without domain)
DNS.2 = servername

# DNS.3: Optional — additional FQDN, short name, or IP address
DNS.3 = server.alias.example.com

# Optional: include email if needed
#IP.1 = 192.1xx.1.10               # Literal IP address
#IP.2 = 10.1.1.5                   # Another IP if needed
#email.1 = admin@example.com

4. Spuštěním níže uvedeného příkazu vygenerujte požadavek CSR a soukromý klíč na základě informací přidaných do souboru. server_cert.cnf.

#openssl req -new -newkey rsa:4096 -nodes -keyout new_server.key -out new_server.csr -config server_cert.cnf

5. CSR se odesílá certifikační autoritě k podpisu. 

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