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The knowledge base of SSL-certificates, articles and answers to common questions
You ask — we answer!
CSR-Generation for Apache
Step by step instruction for generating CSR-request for your site
CSR-Generation for IIS
Step by step instruction for generating CSR-request for your site
SSL Installation for Apache
Step by step instruction for installation SSL-certificate: Apache + Mod SSL + OpenSSL
Installing SSL for IIS
Step by step instruction for installation SSL-certificate on Microsoft IIS
How to get your CPAC
Step by step instruction for collecting your CPAC
Move To HTTPS
How to move a site to HTTPS. Step-by-step guide.
Hot Topic!Difference between DV & OV
Which certificate to choose? Comparing DV and OV
Hot Topic!Difference between OV & EV
Which certificate to choose? Comparing OV and EV
Checking CA status
SSL Help
- Wildcard EV-certificates: which options exist?
- Order SSL-certificate for FATCA and the IRS
- The difference between OV and EV SSL-certificates
- The difference between DV and OV certificates
- How to protect yourself from phishing: LeaderTelecom recommendations
- Best practices for securing web sites for banks
- Certificate Installation
- CSR Generation
- What is SSL?
- Free certificates: why you should not use them
- Cloud services: how to increase sales with an SSL-certificate
- SSL-certificates for online stores: a necessary addition for online businesses
- What is ECC and why you should use it?
- Installation of SSL in Amazon AWS
- AIA Fetching technology for restoring chain of certificates
- How to restore Facebook likes and reposts after switching to HTTPS
- Issuing SSL certificate for an IP address
- Common Mistakes Related to Issuing and Installing SSL Certificates
- Common Name Mismatch Error: effective ways to solve a problem
- OCSP Stapling: how does this technology work?
- Mail server and email certificates: features of use
- What happens if the SSL certificate expires?
- Firefox HTTPS Error Codes
- How to verify compliance of a private key with the SSL certificate and CSR
- How to Install Sectigo (Comodo) Code Signing Certificate (standard or EV) on the token
- Reissue Sectigo (Comodo) Code Signing Certificate
- Order Sectigo (Comodo) Code Signing Certificate in the Certification Authority Interface
- Order automatic callback for Sectigo OV SSL certificates (Comodo)
- AddTrust External CA Root Expired 30 May 2020
- RSA, ECC, ECDSA: which algorithm is better to choose when ordering a digital certificate in LeaderSSL?
- Sectigo Public Root CAs Migration 2025
CPAC/SMIME
Code Signing
- How to order a Code Signing Certificate from LeaderTelecom
- Popular Questions about Code Signing Certificates
- How to sign the Authenticode technology code using Microsoft SignTool
- How to Install Sectigo (Comodo) Code Signing Certificate (standard or EV) on the token
- Reissue Sectigo (Comodo) Code Signing Certificate
- Order Sectigo (Comodo) Code Signing Certificate in the Certification Authority Interface
- How to install and activate Certum Code Signing in the Cloud (standard and EV)
- How to sign the code using Certum Code Signing in the Cloud (standard and EV)
- PFX files are no longer available for Code Signing certificates. What are the other options?
- How to sign using a Sectigo (Comodo) Code Signing Certificate (standard or EV) on the token
Microsoft
- Generating CSR and installing an SSL certificate for Exchange 2013
- Solutions to the problem of prohibiting the use of internal local names in SSL-certificates
- CSR Generation: Microsoft IIS 5.x & 6.x or Microsoft ISA 2000
- CSR Generation: Microsoft IIS 7.x
- CSR generation for Microsoft IIS 4.x
- InstantSSL Certificate Installation: Microsoft IIS 4.x
- InstantSSL Certificate Installation: Microsoft IIS 5.x & 6.x
- Certificate Installation: Microsoft IIS 7.x
- InstantSSL Certificate Installation: Microsoft IIS 4.x
- InstantSSL Certificate Installation: Microsoft IIS Root and Intermediate Certificate installation
