Openssl Server

OpenSSL is an open-source implementation of the SSL and TLS protocols. It includes several code libraries and utility programs, one of which is the command-line openssl program. The openssl program is a useful tool for troubleshooting secure TCP connections to a remote server. OpenSSL comes with a client tool that you can use to connect to a secure server. The tool is similar to telnet or nc in the sense that it handles the encryption aspect but allows you to fully control the layer that comes next. To connect to a server, you need to supply a hostname and a port. Sep 11, 2018 OpenSSL is a widely-used tool for working with CSR files and SSL certificates and is available for download on the official OpenSSL website. It is an open-source implementation tool for SSL/TLS and is used on about 65% of all active internet servers, making it the unofficial industry standard.

To perform certain cryptographic operations (creation of a private key, generation of a CSR, conversion of a certificate ...)on a Windows computer we can use the OpenSSL tool.

  • Go to this website: Download link for OpenSSL

  • Go down in the page and choose the version (in .EXE):
    • Win64 OpenSSL v1.X.X : if your OS is 64 bits
    • Win32 OpenSSL v1.X.X : if your OS is 32 bits

  • For some versions of Windows systems, you may need to install 'Visual C ++ 2008 Redistributable'.
Openssl server example

Use OpenSSL on a Windows machine

Openssl Server

By default, OpenSSL for Windows is installed in the following directory:

  • if you have installed Win64 OpenSSL v1.X.X: C:Program FilesOpenSSL-Win64
  • if you have installed Win32 OpenSSL v1.X.X: C:Program Files (x86)OpenSSL-Win32

To launch OpenSSL, open a command prompt with administrator rights.

b)Generate the private key (.key) and the CSR (Certificate Signing Request)

As part of obtaining (or renewing or reissue) a certificate, you will have to generate a private key and the associated CSR. To do this we advise you to use our online wizard to execute the OpenSSL command with the adequate parameters.
Open a command prompt with Administrators rights (right click - Run as ...). Go to the 'bin' subdirectory from the OpenSSL installation folder.

Example of the command to execut:

Save and keep safe the file containing the private key (.key, and copy / paste only the contents of the file .csr file in the order form.

Issues encountered on Windows while generating a CSR via one command

Openssl Server Windows

According to the version of OpenSSL you installed or to the the installation method on Windows, you may encounter error messages such as:

  • config or req is not recognized as an internal or external command
    Check the syntax and the quotes when executing your command.

  • Unable to load config info from /usr/local/ssl/openssl.cnf
    OpenSSL relies here on a Linux default arborescence.

Troubleshooting: execute simplified commands:

- To launch the command prompt, go to the start menu and execute 'cmd'.
- To paste the following command lines in dos command prompt, right click and select paste.
- To go to the repertory in which is installed OpenSSL, execute:

  • The private key is generated with the following command. Define a file name that suits you:
  • then use this command to generate the CSR:
    or this one:

    On some platforms, theopenssl.cnf that OpenSSL reads by default to create the CSR is not good or nonexistent.In this case you can download ourand place it, for example, in C:Program FilesOpenSSL-Win64openssl.cnf:

    • For DigiCert or Thawte server certificates: openssl-dem-server-cert-thvs.cnf
    • For TBS X509 or Sectigo server certificates: openssl-dem-server-cert.cnf

  • You'll be asked by the system to fill-in fields ; Fill them in and respect the instructions (more information onObtain a server certificate)
    Country Name (2 letter code) []: (FR for example)
    State or Province Name (full name) [Some-State]: (the name of your state in full letters)
    Locality Name (eg, city) []: (the name of your city)
    Organization Name (eg, company) []: (the name of your organization)
    Organizational Unit Name (eg, section) []: (let blank - advised - or provide a generic term such as 'IT department')
    Common Name (eg, YOUR name) []: (the name of the site to be secured)
    Email Address []: (let blank)
    Let the other fields blank, they are optional.

So you get 2 files: site-file.key and site-file.csr. Keep the private key file (site-file.key) securely, then copy / paste the content of the site-file.csr file into the order form at TBS CERTIFICATES.
Warning: Never send us or a third party the private key (site-file.key) otherwise the security of your site may no longer be ensured.


OpenSSL: cases of uses

OpenSSL is the toolbox mainly used by opensource software for SSL implementation.

  • Generate your command line withour CSR creation assistant tool.

Last edited on 10/21/2020 15:07:17 --- [search]

Openssl Server 2016

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Server security requires a CA-signed certificate and the TLS protocol
Reliable security of any production web server requires an SSL certificate signed by a trusted certificate authority (CA) and enforced use of the TLS protocol (that is, HTTPS, not HTTP).

Your on-premises Code42 authority server is no exception. A Code42 server that is configured to use a signed certificate, strict TLS validation, and strict security headers protects server communications with browsers, your Code42 apps, and other servers.

Openssl Server.crt

  • By default, your authority server uses a self-signed certificate and TLS. That provides for encrypting client-server traffic.
  • Adding a CA-signed certificate provides further security by confirming your server's identity to clients. It prevents attackers from acquiring client data through counterfeit servers and encryption keys.
  • Never reconfigure a production server to use HTTP, rather than TLS and HTTPS.
  • Configuring Code42 servers and apps to use strict TLS validation further ensures the security of client-server connections.
  • Configuring Code42 servers to use an HTTPS Strict Transport Security (HSTS) response header further prevents unencrypted browser access to Code42 consoles.