Convert an SSL certificate from CRT to PEM format

Glesys Load Balancer requires SSL certificates to be in PEM format.

---

Glesys Load Balancers accept PEM certificates, and here we explain how to convert your existing CRT‑based certificate to PEM.

When you order a certificate, a CSR file is required. Generating the file also creates a key, for example:

• domain.com.csr

• domain.com.key

When you purchase a certificate, you also receive the remaining files:

• domain.com.crt

• gs_intermediate_domains_ca.crt (ca_bundle)

Three of the files listed above are required to create a complete PEM certificate. Run the following commands to convert your CRT-based certificate to PEM format:

Multiple commands

openssl x509 -in domain.com.crt -out domain.com.pem
openssl rsa -in domain.com.key >> domain.com.pem
openssl x509 -in gs_intermediate_domains_ca.crt >> domain.com.pem

Open the domain.com.pem file in any text editor, copy its contents, and paste them into the load balancer.