Skip to main content

Generate Multi Domain SSL Certificate by useing cert bot tool from Let's Encrypt.

 We are using cert bot tool to generate / create multi domain certificate from Let's Encrypt CA.

we are using following command 




create CSR config file to generate CSR:

Example of csr file is:

default_bits            = 2048  # RSA key size
encrypt_key             = no  # Protect private key
default_md              = sha256  # MD to use
utf8                    = yes  # Input is UTF-8
string_mask             = utf8only  # Emit UTF-8 strings
prompt                  = no  # Prompt for DN
distinguished_name      = server_dn  # DN template
req_extensions          = server_reqext  # Desired extensions

[ server_dn ]
countryName             = CountryName # ISO 3166
stateOrProvinceName     = StateName
localityName            = CityName
organizationName        = OrgName
organizationalUnitName  = UnitName
commonName              = domainname.tld  # Should match a SAN under alt_names

[ server_reqext ]
basicConstraints        = CA:FALSE
keyUsage                = critical,digitalSignature,keyEncipherment
extendedKeyUsage        = serverAuth
subjectKeyIdentifier    = hash
subjectAltName          = @alt_names

[alt_names]
DNS.1            = domainname.tld  #Example
DNS.2            = subdomain1.domainname.tld  #Example
DNS.3            = subdomain2.domainname.tld  #Example


openssl req -new -nodes -sha256 -out newcsr.csr -config cert.cfg -keyout private.key


certbot certonly --csr newcsr.csr --manual --preferred-challenges dns -d "domainname.tld" -d "subdomain1.domainname.tld" -d "subdomain2.domainname.tld" 

 

now your file is generated use it and place it properly.

Comments

Post a Comment

Popular posts from this blog

How to Check all user logged in Linux server?

We are learning how to get all logged in user name in a Linux server you need administrative privileges to execute commands cover here.    There are many ways to list logged in user on a Linux machine. Here I am covering my three favourite  method for this purpose. All this command run with any fedora based system like Red Head Linux , Centos, Rocky Linux, Amla linux etc. 1. lastlog : you can use list command to know all login user. this command uses file available in /var/log/lastlog. This command read data from the mentioned file and present in a human readable from     You can use grep command to filter output and show only currently logged in user by following command. lastlog | grep -v 'Never' In this example we use grep -v switch to exclude all line containing Never. This way we find all currently logged in user. 2. W command : This is more preferable way to get all logged in user, it uses file mentioned on lastlog command and file situated on /proc...
Post a Comment
Read more

Difference between static web page and dynamic web page.

  T he difference between static and dynamic web pages is an important concept to understand for anyone interested in web development or online content creation. In simple terms, a static web page is a page that is pre-built and sent to the user as-is, while a dynamic web page is one that is built on-the-fly in response to user requests. In this article, we'll explore the differences between these two types of web pages in more detail, including their features, advantages, and disadvantages. Static Web Pages A static web page is a pre-built HTML file that is sent to the user's browser when they request a particular URL. These pages are built using HTML, CSS, and other web technologies, and they typically contain fixed content that does not change over time. Static pages are simple, fast, and easy to create, making them a popular choice for small websites and blogs that do not require a lot of interactivity. Features of Static Web Pages Static web pages have several...
Post a Comment
Read more