Disable TLS version 1.0 and 1.1

Disable TLS version 1.0 and 1.1

TLS ( Transport Layer Security) is a protocol which provides authentication, security and data integrity between two communicating applications.
TLS is more effective than its predecessor SSL. Its latest version 1.3 improves both privacy and performance.

Configuration via WebUI
1. Go to Security and select Service page.
one will find the settings for web server which contains TLS versions.
Enable or Disable depends on the need. 
On the same page one can select cipher suit level.

Note: TLS encryption happens between web server and web client only. Data sent and received to the end devices will be encrypted in TLS version which is selected.
TLSv1.3 is supported only on Nodegrid 4.1.x versions.

Configuration via CLI

1. access Nodegrid via ssh or console, and log in as admin
2. copy following commands and paste them into CLI
cd /settings/services/
set tlsv1.1=no
set tlsv1=no
commit

if one wants to set cipher suit level type the following commands: 
set cipher_suit_level=high
commit
 
Note: other options for the suite level are: custom, high, low, medium
Hit tab twice after 'set cipher_suit_level =' to see these options


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