I am attempting to generate CSR using openssl with subject alternative names however i get an error stating no options for adext. See command below.. I am using OpenSSL 1.0.2k-fips
openssl req -new \
-newkey rsa:2048 -nodes -keyout {domain-name}.key \
-out {domain-name}.csr \
-subj "/C=GB/ST=test/L=/O=test/OU=test/CN={domain-name}.com" \
-addext "subjectAltName = DNS:first.{domain-name}.com,DNS:second.{domain-name}.com,DNS:third.{domain-name}.com,DNS:www.{domain-name}.com.com"