First Published: December 15, 2023

About Secure Web Appliance

The Cisco Secure Web Appliance intercepts and monitors Internet traffic and applies policies to help keep your internal network secure from malware, sensitive data loss, productivity loss, and other Internet-based threats.

Supported Ciphers

This section contains the list of supported ciphers (SSL and SSH) for AsyncOS for Secure Web Appliance.

Port 8443 (Management Interface)

TLS 1.0

TLS 1.1

TLS 1.2

ECDHE-RSA-AES256-SHA - YES

ECDHE-RSA-AES256-SHA - YES

ECDHE-RSA-AES256-GCM-SHA384 - YES

DHE-RSA-AES256-SHA - YES

DHE-RSA-AES256-SHA - YES

ECDHE-RSA-AES256-SHA384 - YES

DHE-RSA-CAMELLIA256-SHA - YES

DHE-RSA-CAMELLIA256-SHA - YES

ECDHE-RSA-AES256-SHA - YES

AES256-SHA - YES

AES256-SHA - YES

DHE-RSA-AES256-GCM-SHA384 - YES

CAMELLIA256-SHA - YES

CAMELLIA256-SHA - YES

DHE-RSA-AES256-SHA256 - YES

ECDHE-RSA-AES128-SHA - YES

ECDHE-RSA-AES128-SHA - YES

DHE-RSA-AES256-SHA - YES

DHE-RSA-AES128-SHA - YES

DHE-RSA-AES128-SHA - YES

DHE-RSA-CAMELLIA256-SHA - YES

DHE-RSA-SEED-SHA - YES

DHE-RSA-SEED-SHA - YES

AES256-GCM-SHA384 - YES

DHE-RSA-CAMELLIA128-SHA - YES

DHE-RSA-CAMELLIA128-SHA - YES

AES256-SHA256 - YES

AES128-SHA - YES

AES128-SHA - YES

AES256-SHA - YES

SEED-SHA - YES

SEED-SHA - YES

CAMELLIA256-SHA - YES

CAMELLIA128-SHA - YES

CAMELLIA128-SHA - YES

ECDHE-RSA-AES128-GCM-SHA256 - YES

RSA-PSK-AES256-CBC-SHA384 - YES

ECDHE-RSA-AES128-SHA - YES

AES128-SHA - YES

SEED-SHA - YES

CAMELLIA128-SHA - YES

ECDHE-ECDSA-AES256-GCM-SHA384 - YES

ECDHE-ECDSA-AES128-GCM-SHA256 - YES

ECDHE-ECDSA-AES128-SHA256 - YES

DHE-PSK-AES256-GCM-SHA384 - YES

Port 443 (SSL Port)

TLS 1.0

TLS 1.1

TLS 1.2

TLS 1.3

DHE-RSA-AES256-SHA - YES

DHE-RSA-AES256-SHA - YES

DHE-RSA-AES256-GCM-SHA384 - YES

ECDHE-RSA-AES128-SHA - YES

ECDHE-RSA-AES128-SHA - YES

DHE-RSA-AES128-GCM-SHA256 - YES

ECDHE-ECDSA-AES128-SHA - YES

ECDHE-ECDSA-AES128-SHA - YES

DHE-RSA-AES256-SHA256 - YES

AES256-SHA - YES

AES256-SHA - YES

DHE-RSA-AES128-SHA256 - YES

AES128-SHA - YES

AES128-SHA - YES

DHE-RSA-AES256-SHA - YES

RSA-PSK-AES256-CBC-SHA384 - YES

DHE-RSA-AES256-CCM - YES

PSK-AES256-CBC-SHA384 - YES

ECDHE-RSA-AES256-GCM-SHA384 - YES

DHE-PSK-AES128-CBC-SHA256 - YES

ECDHE-RSA-AES128-SHA256 - YES

AES256-GCM-SHA384 - YES

AES128-GCM-SHA256 - YES

AES256-SHA256 - YES

AES128-SHA256 - YES

AES256-SHA - YES

AES128-SHA - YES

AES256-CCM - YES

AES128-CCM - YES

ECDHE-ECDSA-AES256-GCM-SHA384 - YES

ECDHE-ECDSA-AES128-GCM-SHA256 - YES

ECDHE-ECDSA-AES256-SHA384 - YES

ECDHE-ECDSA-AES128-SHA256 - YES

ECDHE-ECDSA-AES128-SHA - YES

ECDHE-ECDSA-AES256-CCM - YES

ECDHE-ECDSA-AES128-CCM - YES

Default Mode:

ECDHE-RSA-AES128-SHA

ECDHE-ECDSA-AES128-SHA

AES128-SHA

DHE-RSA-AES128-SHA

Default Mode:

ECDHE-RSA-AES128-SHA

ECDHE-ECDSA-AES128-SHA

AES128-SHA

DHE-RSA-AES128-SHA

ECDHE-PSK-AES128-CBC-SHA256

ECDHE-PSK-AES128-CBC-SHA

DHE-PSK-AES128-CBC-SHA256

Default Mode:

ECDHE-ECDSA-AES256-GCM-SHA384

ECDHE-RSA-AES256-GCM-SHA384

ECDHE-ECDSA-AES128-GCM-SHA256

ECDHE-RSA-AES128-GCM-SHA256

ECDHE-ECDSA-AES256-SHA384

ECDHE-RSA-AES256-SHA384

ECDHE-ECDSA-AES128-SHA256

ECDHE-RSA-AES128-SHA256

ECDHE-ECDSA-AES128-SHA

ECDHE-RSA-AES128-SHA

AES256-GCM-SHA384

AES128-GCM-SHA256

AES256-SHA256

AES128-SHA256

AES128-SHA

DHE-RSA-AES128-SHA

DHE-PSK-AES256-GCM-SHA384

ECDHE-PSK-CHACHA20-POLY1305

DHE-PSK-AES128-GCM-SHA256

Default Mode:

TLS_CHACHA20_POLYI305_SHA256

Note

 

AsyncOS 12.0.1 and later versions support ECDHE related ciphers for TLS 1.0, TLS 1.1, and TLS 1.2.

Note

 

AsyncOS 12.0.1 and later versions support TLS 1.3.

Note

 

Default mode represents the supported ciphers with the “SSL Cipher String” that is configured in the Secure Web Appliance.

Port 22 (SSH Port)

ssh2-enum-algos:

1. kex_algorithms (8):

  • diffie-hellman-group14-sha1

  • ecdh-sha2-nistp256

  • ecdh-sha2-nistp384

  • ecdh-sha2-nistp521

  • diffie-hellman-group14-sha256

  • curve25519-sha256

  • curve25519-sha256@libssh.org

  • diffie-hellman-group16-sha512

2. encryption_algorithms (7):

  • aes192-cbc

  • aes256-cbc

  • aes128-ctr

  • aes192-ctr

  • aes256-ctr

  • aes128-cbc

  • chacha20-poly1305@openssh.com

3. server_host_key_algorithms (4):

  • rsa-sha2-256

  • ssh-rsa

  • ssh-dss

  • rsa-sha2-512

4. mac_algorithms (3):

  • hmac-sha2-256

  • hmac-sha1

  • hmac-sha2-512

5. compression_algorithms (2):

  • none

  • zlib@openssh.com

Unsupported Ciphers

The following ciphers are not supported from the release SWA15.0 onwards with OpenSSL-1.1.1

TLS_AES_256_GCM_SHA384

TLS_CHACHA20_POLY1305_SHA256

TLS_AES_128_GCM_SHA256

ECDHE-ECDSA-CHACHA20-POLY1305

ECDHE-RSA-CHACHA20-POLY1305

DHE-RSA-CHACHA20-POLY1305

RSA-PSK-AES256-GCM-SHA384

DHE-PSK-AES256-GCM-SHA384

RSA-PSK-CHACHA20-POLY1305

DHE-PSK-CHACHA20-POLY1305

ECDHE-PSK-CHACHA20-POLY1305

PSK-AES256-GCM-SHA384

PSK-CHACHA20-POLY1305

RSA-PSK-AES128-GCM-SHA256

DHE-PSK-AES128-GCM-SHA256

PSK-AES128-GCM-SHA256

ECDHE-PSK-AES256-CBC-SHA384

RSA-PSK-AES256-CBC-SHA384

DHE-PSK-AES256-CBC-SHA384

PSK-AES256-CBC-SHA384

ECDHE-PSK-AES128-CBC-SHA256

ECDHE-PSK-AES128-CBC-SHA

RSA-PSK-AES128-CBC-SHA256

DHE-PSK-AES128-CBC-SHA256

RSA-PSK-AES128-CBC-SHA

DHE-PSK-AES128-CBC-SHA

PSK-AES128-CBC-SHA256

Port 8443 (Management Interface)

SSL V 3.0

TLS 1.0

RC4-MD5

RC4-MD5

RC4-SHA

RC4-SHA