Setting the TLS Protocol Version

The switch by default supports version TLS 1.2 and above. You can explicitly configure TLS 1.0 and TLS 1.1 version support using CLI.

Note

In enhanced secure mode, TLS 1.0 is available on 5520 Series and 5420 Series only.

About this task

Disable the web server before changing the TLS version. By disabling the web server, other existing users with a connection to the web server are not affected from changing to a different version after you run the tls-min-ver command.

Procedure

Enter Global Configuration mode:

enable

configure terminal
Disable the web server:

no web-server enable
Set the TLS protocol version:

web-server tls-min-ver [tlsv10 | tlsv11 | tlsv12]
Enable the web server:

web-server enable
Verify the protocol version:

show web-server

Example

Switch> enable
Switch# configure terminal
Switch(config)# web-server tls-min-ver tlsv12

Verify the protocol version.

Switch:1(config)#show web-server
Web Server Info :

        Status                    : off
        Secure-only               : enabled
        TLS-minimum-version       : tlsv12
        RO Username Status        : disabled
        RO Username               : user
        RO Password               : ********
        RWA Username              : admin
        RWA Password              : ********
        Def-display-rows          : 30
        Inactivity timeout        : 900 sec
        Html help tftp source-dir :
        HttpPort                  : 80
        HttpsPort                 : 443
        NumHits                   : 0
        NumAccessChecks           : 0
        NumAccessBlocks           : 0
        NumRxErrors               : 0

        NumTxErrors               : 0
        NumSetRequest             : 0
        Minimum password length   : 8
        Last Host Access Blocked  : 0.0.0.0
        In use certificate        : Self signed
        Certificate Truspoint CA Name :
        Certificate with Subject Name : 823

        Ciphers-Tls               : TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
                                    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
                                    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 TLS_DHE_RSA_WITH_AES_256_CBC_SHA
                                    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 TLS_DHE_RSA_WITH_AES_128_CBC_SHA
                                    TLS_RSA_WITH_AES_256_CBC_SHA256 TLS_RSA_WITH_AES_256_CBC_SHA
                                    TLS_RSA_WITH_AES_128_CBC_SHA256 TLS_RSA_WITH_AES_128_CBC_SHA

Variable Definitions

Use the data in the following table to use the web-server command.


Variable	Value
def-display-rows `<10-100>`	Configures the number of rows each page displays, between 10 and 100.
enable	Enables the web interface. To disable the web server, use the no form of this command: `no web-server [enable]`
help-tftp `<WORD/0-256>`	Configures the TFTP or FTP directory for Help files, in one of the following formats: a.b.c.d:/\| peer:/ [<dir>]. The path can use 0–256 characters. The following example paths illustrate the correct format: 192.0.2.1:/help 192.0.2.1:/
http-port `<80-49151>`	Configures the web server HTTP port. The default port is 80.
https-port `<443-49151>`	Configure the web server HTTPS port. The default port is 443.
inactivity-timeout`<30–65535>`	Configures the web-server session inactivity timeout. The default is 900 seconds (15 minutes).
password {ro \| rwa} `WORD<1-20>`	Configures the logon and password for the web interface.
password min-passwd-len`<1–32>`	Configures the minimum password length. By default, the minimum password length is 8 characters.
read-only-user	Enables read-only user for the web server. Note: read-only-user enable is available for demonstration purposes on some products. For more information, see VOSS Feature Support Matrix.
secure-only	Enables secure-only access for the web server.
tls-min-ver`<tlsv10\|tlsv11\|tlsv12>`	Configures the minimum version of the TLS protocol supported by the web-server. You can select among the following: tlsv10 – Configures the version to TLS 1.0. Note: tlsv10 is not supported in enhanced secure mode. tlsv11 – Configures the version to TLS 1.1. tlsv12 – Configures the version to TLS 1.2 The default is tlsv12.