Specify a unique name for the client SSL profile.

Enable or disable the use of user-specified cipher suites. If enabled, you must specify a colon-separated, ordered list of a customized SSL cipher suites. See below.

Available only when the Customized SSL Cipher Flag is enabled (see above). Specify a colon-separated, ordered list of a customized SSL cipher suites.

Note: FortiADC will use the default SSL cipher suite if the field is left empty.

Ciphers are listed from strongest to weakest:

• ECDHE-ECDSA-AES256-GCM-SHA384
• ECDHE-ECDSA-AES256-SHA384

• ECDHE-ECDSA-CAMELLIA256-SHA384

• *ECDHE-ECDSA-AES256-SHA
• ECDHE-ECDSA-AES128-GCM-SHA256
• *ECDHE-ECDSA-AES128-SHA256

• ECDHE-ECDSA-CAMELLIA128-SHA256

• *ECDHE-ECDSA-AES128-SHA
• ECDHE-ECDSA-DES-CBC3-SHA
• ECDHE-ECDSA-RC4-SHA
• ECDHE-RSA-AES256-GCM-SHA384
• ECDHE-RSA-AES256-SHA384

• ECDHE-RSA-CAMELLIA256-SHA384

• *ECDHE-RSA-AES256-SHA
• DHE-RSA-AES256-GCM-SHA384
• *DHE-RSA-AES256-SHA256

• DHE-RSA-CAMELLIA256-SHA256

• *DHE-RSA-AES256-SHA

• DHE-RSA-CAMELLIA256-SHA

• AES256-GCM-SHA384
• *AES256-SHA256
• *AES256-SHA
• ECDHE-RSA-AES128-GCM-SHA256
• *ECDHE-RSA-AES128-SHA256

• ECDHE-RSA-CAMELLIA128-SHA256

• DHE-RSA-AES128-GCM-SHA256
• *DHE-RSA-AES128-SHA256

• DHE-RSA-CAMELLIA128-SHA256

• *DHE-RSA-AES128-SHA
• AES128-GCM-SHA256
• *AES128-SHA256
• *AES128-SHA
• ECDHE-RSA-RC4-SHA
• RC4-SHA
• RC4-MD5
• EDH-RSA-DES-CBC3-SHA
• DES-CBC3-SHA
• eNULL

*These ciphers are fully supported by hardware SSL (in 400F, 1200F, 2200F, 4200F and 5000F).

Note: We recommend retaining the default list. If necessary, you can deselect the SSL ciphers that you do not want to support.

TLSv1.3 ciphers are listed as following:

• TLS_AES_256_GCM_SHA384
• TLS_AES_128_GCM_SHA256
• TLS_CHACHA20_POLY1305_SHA256
• TLS_AES_128_CCM_SHA256
• TLS_AES_128_CCM_8_SHA256

Note: This option only available if the TLSv1.3 is checked.

You have the following options:

• SSLv3
• TLSv1.0
• TLSv1.1
• TLSv1.2
• TLSv1.3

We recommend retaining the default list. If necessary, you can deselect SSL versions you do not want to support.

Note:

• FortiADC does not support session reuse for SSLv2 at the client side. Instead, a new SSL session is started. Please make sure that the SSL versions are continuous. IF not, an error message should be returned.

• RFC 7919 Comply cannot support SSLv3 and TLS 1.3. If RFC 7919 Comply is enabled and SSLv3 or TLSv1.3 is selected in Allowed SSL Versions, an error message will display.

Select the client certificate verify configuration object.

Note: For VS configurations that reference a ZTNA Profile, ensure the corresponding EMS CA certificate is selected for the corresponding Client SSL profile.

The Client Certificate Verify Mode option is available if the Client Certificate Verify is selected.

Select one of the following:

• Required (default)

• Optional

Allows to the same SSL client attempts to reconnect to this SSL server and requests a resumption of a previous SSL session.

Note: This feature doesn’t support TLSv1.3

Allows resuming TLS sessions by storing key material encrypted on the clients.

Note: This feature doesn’t support TLSv1.3

The Client Certificate Forward option is available if the Client Certificate Verify is selected.

Disabled by default. When enabled, you must specify the client certificate forward header.

The Client Certificate Forward Header option is available if the Client Certificate Verify is selected and Client Certificate Forward is enabled.

Specify the client certificate forward header.

By default, (SSL) Forward Proxy is disabled. When enabled, you'll have to configure additional settings noted below.

Note: RFC 7919 Comply is not supported for Forward Proxy. If RFC 7919 Comply is enabled and Forward Proxy is enabled, the RFC 7919 Comply feature will not apply to Forward Proxy functionality.

Require clients to use the TLS server name indication (SNI) extension to include the server hostname in the TLS client hello message. Then, the FortiADC system can select the appropriate local server certificate to present to the client.

Select a local certificate group that includes the certificates this virtual server presents to SSL/TLS clients. This should be the backend servers' certificate, NOT the appliance's GUI web server certificate. See Manage Certificates.

This flag is meaningful only when you have configured OCSP stapling in Local Certificate Group.

By default, this option is disabled (unselected). In that case, FortiADC accepts all OCSP responses, including those in which the next update field is not set. If enabled, and the next update field is not set in an OCSP stapling response, FortiADC will not load this OCSP stapling response or present it to clients during the SSL/TLS handshake.

Enable or disable SSL renegotiation from the client side.

Note:

• The feature is disabled by default.
• When enabled, you must configure the options below.

Specify the minimum interval between two successive client-initiated SSL renegotiation requests. The unit of measurement can be second, minute, or hour, e.g., 100s, 20m, or 1h.

Note:

• The default is -1, which disables the function.
• 0 means ‘Indefinite’.
• FortiADC will terminate the connection once the threshold is exceeded.

Specify the pubkey length in Diffie Hellman. Default is 1024.

Note: The SSL DH Parameter Size option is not available when RFC 7919 Comply is enabled.

Specify the period in second (default), minute, or hour at which FortiADC will initiate SSL renegotiation.

Note: The default is 0, which disables the function.

Specify the amount (MB) of application data that must have been transmitted over the SSL connection whenFortiADC initiates SSL renegotiation.

Note: The default is 0, which disables the function.

Select one of the following:

• Request—FortiADC requests secure renegotiation of SSL connections.
• Require—(Default) Specifies thatFortiADC requires secure renegotiation of SSL connections. In this mode, FortiADC permits initial SSL handshakes from clients, but terminates renegotiation requests from clients that do not support secure renegotiation.
• Require Strict—FortiADC requires strict secure renegotiation of SSL connections. In this mode, FortiADC denies initial SSL handshakes from clients that do not support secure renegotiation.

Enable/disable parameters to comply with RFC 7919.

Note:

• RFC 7919 Comply is not supported for Forward Proxy. If RFC 7919 Comply is enabled and Forward Proxy is enabled, the RFC 7919 Comply feature will not apply to Forward Proxy functionality.

• RFC 7919 Comply cannot support SSLv3 and TLS 1.3. If RFC 7919 Comply is enabled and SSLv3 or TLSv1.3 is selected in Allowed SSL Versions, an error message will display.

• When RFC 7919 Comply is enabled the SSL DH Parameter Size option becomes unavailable.

The Supported Groups option is available if RFC 7919 Comply is enabled.

Specify the supported group objects from the following:

• secp256r1

• secp384r1

• secp521r1

• x25519

• x448

• ffdhe2048

• ffdhe3072

• ffdhe4096

• ffdhe6144

• ffdhe8192

At least one item from the FFDHE group must be selected.

Note:

The RFC 7919 Comply feature requires certain cipher selections to correspond with the Supported Group selection.

• If a FFDHE group is selected (for example, ffdhe2048), then at least one cipher must be DHE-RSA (for example, DHE-RSA-AES256-SHA256).

• If the Supported Group includes groups other than FFDHE (such as a SECP group, secp256r1), then at least one cipher must be ECDHE (for example, ECDHE-ECDSA-AES256-GCM-SHA384).

• If a ECDHE cipher is selected (for example, ECDHE-ECDSA-AES256-GCM-SHA384), then the Supported Group must include at least one group that is not FFDHE (such as a SECP group, secp256r1).

Allows ADC to dynamically adjust the size of TLS records based on the state of the connection, in order to prevent bottlenecks caused by the buffering of TLS record fragments.

Note: The feature is disabled by default.

The Forward Proxy Certificate Caching option is available if Forward Proxy is enabled.

Select a Forward Proxy Certificate Caching rule.

The Forward Proxy Local Signing CA option is available if Forward Proxy is enabled.

Select a Forward Proxy Local Signing CA.

The Forward Proxy Intermediate CA Group option is available if Forward Proxy is enabled.

Select a Forward Proxy Intermediate CA Group.

The Forward Proxy Resign Cert by SNI option is available if Forward Proxy is enabled.

Enabled by default, the Forward Proxy Resign Cert by SNI option allows SSL Forward Proxy to return re-signed local certificates with modified CN (or SAN) matching the ClientHello Server Server Name Indication (SNI). This allows the proxy to act automatically when the SNI is detected in the ClientHello message to return a re-signed local certificate to the client. The Common Name (CN) and/or Subject Alternative Name (SAN) of this certificate will be adeptly modified to align with the SNI, ensuring a seamless and trustworthy SSL handshake process.

Note: This function is supported HTTP/S virtual servers and real server pools with HTTP/S topology.

The Backend SSL SNI Forward option is available if Forward Proxy is enabled.

Disabled by default. Enable it to let FortiADC forward Server Name Indication (SNI) from the client to the back end.

The Backend Customized SSL Ciphers Flag option is available if Forward Proxy is enabled.

Enabled by default. In this case, you must specify the backend customized SS ciphers. See below.

The Backend Customized SSL Ciphers option is available if Forward Proxy and Backend Customized SSL Ciphers Flag are enabled.

Specify the customized SSL ciphers to be supported at the back end.

The Backend SSL Cipher Suite List option is available if Forward Proxy is enabled and Backend Customized SSL Ciphers Flag is disabled.

Select the cipher from the list to be supported at the back end.

The Backend TLSv1.3 Cipher Suite List option is available if Forward Proxy is enabled and Backend Allowed SSL Versions selected TLSv1.3.

TLSv1.3 ciphers are listed as following:

TLS_AES_256_GCM_SHA384

TLS_AES_128_GCM_SHA256

TLS_CHACHA20_POLY1305_SHA256

TLS_AES_128_CCM_SHA256

TLS_AES_128_CCM_8_SHA256

Note: This option only available if the backendTLSv1.3 is checked.

The Backend Allowed SSL Versions option is available if Forward Proxy is enabled.

We recommend retaining the default list. If necessary, you can deselect SSL versions you do not want to support.

Note: FortiADC does not support session reuse for SSLv2 at the client side. Instead, a new SSL session is started.