Self-Signed Certificates

Postlab Local requires HTTPS, so you must create a self-signed certificate to install on the server and all clients.

1. Install Packages

[email protected]:~# apt-get install openssl ca-certificates
[email protected]:~# mkdir certs
[email protected]:~# cd certs

2. Generate a Private Key

[email protected]:~/certs# openssl genrsa -out server.key 2048
Generating RSA private key, 2048 bit long modulus
e is 65537 (0x10001)

3. Generate a Certificate Signing Request

[email protected]:~/certs# openssl req -new -key server.key -out server.csr
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
Country Name (2 letter code) [AU]: CU
State or Province Name (full name) [Some-State]:Cuba
Locality Name (eg, city) []:
Organization Name (eg, company) [Internet Widgits Pty Ltd]:My Home Lan
Organizational Unit Name (eg, section) []:
Common Name (e.g. server FQDN or YOUR name) []:*.edu.cu
Email Address []:
Please enter the following `extra` attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:

4. Create a Self-Signed Certificate

[email protected]:~/certs# openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt
Signature ok
subject=/C=CU/ST=Cuba/O=Home Lan/CN=*.edu.cu
Getting Private key
Enter pass phrase for server.key:

5. Install a Private Key and Self-Signed Certificate

[email protected]:~/certs# cp server.key /etc/ssl/private/
[email protected]:~/certs# cp server.crt /etc/ssl/certs/
Name the resulting files after your hostname, then copy those files into /etc/gitlab/ssl/ .
For example, if your GitLab server's hostname is gitlab.edu.cu, you would name your files this way:
  • /etc/gitlab/ssl/gitlab.edu.cu.key
  • /etc/gitlab/ssl/gitlab.edu.cu.crt
  1. 1.
    Download the certificate from the Postlab Local server.
  2. 2.
    Double-click the certificate file.
  3. 3.
    Set Trust > When using this certificate: to Always Trust.
Trust > When using this certificate: Always Trust