NetWorker: CSR-generering til SSL med "Subject Alternative Name" SAN

1. Opret en fil på enhver Linux-vært.

vi server_cert.cnf

2. Indsæt nedenstående indhold i server_cert.cnf fil.

[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. Når ovenstående skabelon er oprettet, skal du angive de miljøspecifikke oplysninger. Kontakt din domæneadministrator, hvis der er behov for hjælp til at generere CSR. 

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

* ISO-koden på to bogstaver for det land eller område, hvor organisationen er placeret.

Tilføj eller fjern DNS.x- og IP.x-poster efter behov.

Eksempel:

[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. Kør nedenstående kommando for at generere CSR og den private nøgle baseret på de oplysninger, der er tilføjet i filen server_cert.cnf.

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

5. CSR'en indsendes til en certifikatmyndighed til underskrift. 

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