View source for TLS Certificates LV Demo

 <p style="color:red">The information in this page is updated in accordance with [https://firmware.teltonika-networks.com/7.9.1/RUTX/RUTX_R_00.07.09.1_WEBUI.bin'''00.07.09.1'''] firmware version.</p> 
==Summary==

Some services (such as OpenVPN, MQTT, etc.) on Teltonika Networks devices can be secured using <b>TLS</b> for encryption and authentication. This page discusses where one can obtain TLS certificates and key for this purpose.

==Certificate generation==

If you are using a third party service that requires TLS, all necessary files should be provided by the provider of that service. However, if you are setting up your own solution you may find use in of the <b>TLS certificate generation methods</b> described below.

===Teltonika Networks device===
----
The easiest way to generate certificates and keys is by using the <b>Certificate Generation</b> page that is available in the device's WebUI:

<ul>
    <li>System → Administration → [[RUTX11_Administration#Certificates|Certificates]]</li>
</ul>

====Generation of Certificate Authority (CA) Certificate & Key====
----
The first step is to generate a Certificate Authority (CA) certificate, which will be used to sign both server and client certificates.
#Choose the file type as '''CA'''.
#On Teltonika routers, users can select from four '''Key Size''' options, ranging from '''512 bits to 4096 bits.'''
#Enter the '''Common Name'''. This usually represents the fully qualified domain name (FQDN) of the server (e.g., example.com), but it can be any name of your choice.
[[File:Tls certificates ca.png|border|class=tlt-border]]
#<li value="4">By enabling '''Subject Information''', you can provide details about the entity to which the certificate is issued (Optional):
::A. '''Country Code (CC)''': The two-letter country code (e.g., LT for Lithuania).
::B. '''State or Province Name (ST)''': The name of the state or province (e.g., California).
::C. '''Locality Name (L)''': The city or locality (e.g., San Francisco).
::D. '''Organization Name (O)''': The name of the organization or company (e.g., Teltonika).
::E. '''Organizational Unit Name (OU)''': The name of the department or unit within the organization (e.g., IT Department).
#
::''These fields help to clearly identify the organization or individual associated with the certificate.''
[[File:Tls certificates ca gen sub info.png|border|class=tlt-border]]

#<li value="5"> Select the "'''On'''" option next to "'''Sign the Certificate'''." If not enabled, the Root CA will not sign or generate the new CA.
#Enter the period of how long CA certificate will be valid
#"'''Delete Signing Request'''" can be enabled, as it is not required after generation.
#Click [[File:Tls certificates generate button.png|62px]] button
#
[[File:Tls certificates ca p3.png|border|class=tlt-border]]
#

====Generation of Server Certificate & Key====
----
A server certificate, signed by a trusted Certificate Authority (CA), is used to authenticate the server and facilitate secure, encrypted communications with clients. Generating a server certificate follows similar steps to those for creating a CA certificate.

#Select '''Server''' file type.
#Select '''Key Size'''
#Enter '''Common Name''' of the '''Server'''
#'''Subject Information''' of the server(Optional)
#Select the "'''On'''" option next to "'''Sign the Certificate'''".
#Define how long the certificate will be '''valid'''.
#The system should automatically detect the CA certificate and key files from "Certificates Manager" tab.
#"'''Delete Signing Request'''" (Optional)
#Click [[File:Tls certificates generate button.png|62px]] button
[[File:Tls certificates server.png|border|class=tlt-border]]

====Generation of Client Certificate & Key====
----
A client certificate, signed by a trusted Certificate Authority (CA), is used to authenticate the client and facilitate secure, encrypted communications with other clients and servers. Generating a server certificate follows similar steps to those for creating a CA certificate.

#Select '''Client''' file type.
#Select '''Key Size'''
#Enter '''Common Name''' of the Client
#'''Subject Information''' of the Client(Optional)
#Select the "'''On'''" option next to "'''Sign the Certificate'''".
#Define how long the certificate will be '''valid'''.
#The system should automatically detect the CA certificate and key files from the "Certificates Manager" tab.
#"'''Delete Signing Request'''" (Optional)
#"'''Private Key Decryption password'''" (Optional)
#Click [[File:Tls certificates generate button.png|62px]] button
[[File:Tls certificates client.png|border|class=tlt-border]]

====Generation of DH Parameters====
----
The '''DH parameters''' refers to the parameters used in the Diffie-Hellman key exchange. This cryptographic protocol allows two parties to generate a shared secret over an untrusted communication channel securely. In practical use, such as with VPNs, TLS/SSL, or routers, DH parameters are used to securely generate session keys for encrypting data. Generating a DH Parameters follows similar steps:

#Select '''DH Parameters''' file type.
#Select '''Key Size'''
#Enter '''Common Name'''
#Click [[File:Tls certificates generate button.png|62px]] button
[[File:Tls certificates dh.png|border|class=tlt-border]]

====Generation of "Let's Encrypt" Certificate & Key====
----
Let's Encrypt provides free SSL/TLS certificates that are widely used for securing web services, VPNs, and other network communications. In practical use, such as with websites, routers, or VPNs, the Let's Encrypt certificate and key enable HTTPS connections or secure tunnels. Generating a Let's Encrypt certificate and key follows similar steps:

==Certificate signing==
#Select the "'''Let's Encrypt'''" file type.
#Enter the '''Domain''' name of the remote server associated with the public IP.
#Enable '''Automatic renewal''' if you'd like the certificates to be automatically renewed every 60 days (Optional).
#Click [[File:Tls certificates generate button.png|62px]] button
[[File:Tls certificates lets encrypt.png|border|class=tlt-border]]

===Computer===
---- 
You can also use third party software to generate the certificates on your computer. Guides are available for:

<ul>
    <li>[[How to generate TLS certificates (Windows)?|Windows]]</li>
    <li>[[How to generate TLS certificates (Ubuntu 18)?|Linux]]</li>
</ul>

[[Category:Security]]