We are not really elastidump experts but looking at the docs here looks like there are options for self signed certs.
--cert, --input-cert, --output-cert
Client certificate file. Use --cert if source and destination are identical.
Otherwise, use the one prefixed with --input or --output as needed.
--key, --input-key, --output-key
Private key file. Use --key if source and destination are identical.
Otherwise, use the one prefixed with --input or --output as needed.
--pass, --input-pass, --output-pass
Pass phrase for the private key. Use --pass if source and destination are identical.
Otherwise, use the one prefixed with --input or --output as needed.
--ca, --input-ca, --output-ca
CA certificate. Use --ca if source and destination are identical.
Otherwise, use the one prefixed with --input or --output as needed.
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