SSH encryption

Hello,

where can I change the default encryption for SSH (3820 Release S-CX6.4.0), the encryption (SHA1, MD5) is the customer not secure enough.

PORT     STATE  SERVICE       VERSION

22/tcp   open   ssh           Mocana embedded SSH (protocol 2.0)

| ssh2-enum-algos:

|   kex_algorithms: (2)

|       diffie-hellman-group14-sha1

|       diffie-hellman-group1-sha1

|   server_host_key_algorithms: (2)

|       ssh-dss

|       ssh-rsa

|   encryption_algorithms: (8)

|       aes256-cbc

|       rijndael256-cbc

|       aes192-cbc

|       rijndael192-cbc

|       aes128-cbc

|       rijndael128-cbc

|       3des-cbc

|       arcfour

|   mac_algorithms: (4)

|       hmac-sha1

|       hmac-sha1-96

|       hmac-md5

|       hmac-md5-96

|   compression_algorithms: (1)

|_      none

Thanks,

Wolfgang