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Showing posts with the label OPENSSL is needed by

Ever tried to install or upgrade the OpenSSL package installed on linux server ? Ok. so I had similar experiance in my current company where i faced a error while doing the upgrade of openssl package on redhat machine. and I was doing that to get rid of vulnerabilities.                                                                      Error I faced: l is needed by  OR is needed                                                              Error cause because of: I was trying to upgrade the OpenSSL package on redhat/centos linux machine. Sometimes you can get this error while working on any other package upgrade as well. in that case too similar solution would be applicable which i mentioned below.                                                               Solution to the Error: Upgrade the installed OpenSSL version for below packages openssl openssl-devel Upgrade the zlib package by using YUM ====

Subject Alernative names with Openssl

In this post we will see, how can we create CSR with SAN, which stands for Subject Alternative Names and obviously using openssl command. For those who do not know what is SAN, let me cover this in short.There are 3 main types of SSL  Standard SSL  :- Used for securing single domain. like, i,e one domain -- one certificate Wild card SSL : - Used for securing multiple sub-domains like in single certificate, i.e multiple subdomain --- single certificate Multi-domain SSL : -- Used for securing multiple domains, like,,, i,e multiple domains --- single certificate. So, SAN comes under multiple domains certificate category. When you purchase a multi-domain certificate from certificate issuing authority ,they give you options of defining SAN along with primary domain. So, Here we are discussing about how to create CSR(which is required while purchasing the certificate) with SAN itself.