Convert Lets Encrypt Cert to pfx for import into HP Printer

Written by James McDonald

August 6, 2021

Create a cert using the dns challenge

# use dns challenge to create cert
sudo certbot certonly -d --manual --preferred-challenges dns

# chane to the location of the created certs
cd /etc/letsencrypt/live/

# convert to pfx
openssl pkcs12 -export -out /home/rupert/test.pfx -inkey privkey.pem -in cert.pem -certfile chain.pem

Downloaded and install the Root cert too from

I used the Cross-signed by DST Root CA X3: der, pem, txt in pem format to import a CA Cert into printer


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