Sena STS Series User Manual page 125

Not After : Oct
Subject: C=US, ST=Minnesota, L=Minneapolis, O=Digi International, CN=Digi
PortServer CM
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
RSA Public Key: (1024 bit)
....
== Removing above lines ===
-----BEGIN CERTIFICATE-----
....
-----END CERTIFICATE-----
5-2. Concatenating key.pem file to server.pem
# cat key.pem >> server.pem
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