Brocade: Access to the switch web management console does not work after Fabric OS upgrade

If, after updating the Fabric OS firmware, there is no access to the switch’s web management console and a certificate error appears in the browser, you must perform the following steps:

1. Check the availability of a certificate for HTTPs access to the switch:
seccertmgmt show -cert https

2. If necessary, generate a new one:
seccertmgmt generate -cert https -type rsa -keysize 2048 -hash sha256 -years 20

3. Check encryption protocol settings:
seccryptocfg --show

4. You can set the settings as follows if there is a problem with the web browser:

seccryptocfg --replace -type https -cipher 'ECDSA:ECDH:RSA:AES:3DES:!RSAPSK:!DHEPSK:!PSK:!DSS:!AESCCM8:!AESCCM:!ARIAGCM:!CAMELLIA:!CHACHA20:!SEED:!RC4'

5. Check if the current settings match the default security template:
seccryptocfg --verify default_generic

6. If necessary, apply a security template:
seccryptocfg --apply default_generic

The full list of security templates can be viewed with the command:
seccryptocfg --lstemplates