Is there a AES cipher that traffic passes through to encrypt data that is sent to disk via replication?

The SnapReplicate® feature provides block-level replication between two SoftNAS instances. SnapReplicate between source and target SoftNAS instances sends all data through encrypted SSH tunnels and authenticates using RSA PKI. Data is encrypted in transit using industry-standard ciphers. The default cipher for encryption is Blowfish-CBC, selected for its balance of speed and security, but you can use any cipher supported by SSH, including AES256-CBC.