CSR 생성은 기존의 서버 설정이나 파일을 수정하는 것과는 관련이 없습니다.

윈도우 command 창에서 openssl req -new -key [키 파일] -out [생성할 CSR 키 파일명] 명령어 또는

웹 페이지에서 생성하실 수 있습니다.

자세한 내용은 아래의 링크들을 참고해보시겠어요?

https://www.ucert.co.kr/tech/csr/apache.html

https://www.gogetssl.com/online-csr-generator/

직접 하시기 어려우시다면 호스팅 업체에 SSL 설치 관련해서 문의해보시면 도움을 줄 겁니다.

고맙습니다.

아파치(Apache) CSR생성을 먼저 해야 한다고 해서요. 경로를 찾지 못해서요

 CSR생성을 위해서  Apache > httpd > CSR을 생성하는 되는 것인지...

 httpd 안에  들어갔습니다.

ServerName localhost
#Don't modify below.
ServerRoot "/etc/httpd/"
Listen 8000
PidFile "/var/run/httpd.pid"
ServerAdmin "admin@localhost"
DocumentRoot "/mnt/VOL1/MYSQL/"
<Directory />
	AllowOverride none
	Require all denied
</Directory>
<Directory "">
	Options FollowSymLinks
	AllowOverride all
	Require all granted
</Directory>

LoadModule authn_file_module modules/mod_authn_file.so
#LoadModule authn_dbm_module modules/mod_authn_dbm.so
#LoadModule authn_anon_module modules/mod_authn_anon.so
#LoadModule authn_dbd_module modules/mod_authn_dbd.so
#LoadModule authn_socache_module modules/mod_authn_socache.so
LoadModule authn_core_module modules/mod_authn_core.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_user_module modules/mod_authz_user.so
#LoadModule authz_dbm_module modules/mod_authz_dbm.so
#LoadModule authz_owner_module modules/mod_authz_owner.so
#LoadModule authz_dbd_module modules/mod_authz_dbd.so
LoadModule authz_core_module modules/mod_authz_core.so
LoadModule access_compat_module modules/mod_access_compat.so
LoadModule auth_basic_module modules/mod_auth_basic.so
#LoadModule auth_form_module modules/mod_auth_form.so
#LoadModule auth_digest_module modules/mod_auth_digest.so
#LoadModule allowmethods_module modules/mod_allowmethods.so
#LoadModule file_cache_module modules/mod_file_cache.so
#LoadModule cache_module modules/mod_cache.so
#LoadModule cache_disk_module modules/mod_cache_disk.so
#LoadModule socache_shmcb_module modules/mod_socache_shmcb.so
#LoadModule socache_dbm_module modules/mod_socache_dbm.so
#LoadModule socache_memcache_module modules/mod_socache_memcache.so
#LoadModule dbd_module modules/mod_dbd.so
#LoadModule dumpio_module modules/mod_dumpio.so
#LoadModule buffer_module modules/mod_buffer.so
#LoadModule ratelimit_module modules/mod_ratelimit.so
LoadModule reqtimeout_module modules/mod_reqtimeout.so
#LoadModule ext_filter_module modules/mod_ext_filter.so
#LoadModule request_module modules/mod_request.so
#LoadModule include_module modules/mod_include.so
LoadModule filter_module modules/mod_filter.so
#LoadModule substitute_module modules/mod_substitute.so
#LoadModule sed_module modules/mod_sed.so
#LoadModule deflate_module modules/mod_deflate.so
LoadModule mime_module modules/mod_mime.so
LoadModule log_config_module modules/mod_log_config.so
#LoadModule log_debug_module modules/mod_log_debug.so
#LoadModule logio_module modules/mod_logio.so
LoadModule env_module modules/mod_env.so
#LoadModule expires_module modules/mod_expires.so
LoadModule headers_module modules/mod_headers.so
#LoadModule unique_id_module modules/mod_unique_id.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule version_module modules/mod_version.so
#LoadModule remoteip_module modules/mod_remoteip.so
#LoadModule proxy_module modules/mod_proxy.so
#LoadModule proxy_connect_module modules/mod_proxy_connect.so
#LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
#LoadModule proxy_http_module modules/mod_proxy_http.so
#LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
#LoadModule proxy_scgi_module modules/mod_proxy_scgi.so
#LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
#LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
#LoadModule proxy_express_module modules/mod_proxy_express.so
#LoadModule session_module modules/mod_session.so
#LoadModule session_cookie_module modules/mod_session_cookie.so
#LoadModule session_dbd_module modules/mod_session_dbd.so
#LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
#LoadModule ssl_module modules/mod_ssl.so
#LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
#LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so
#LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so
#LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so
LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
LoadModule unixd_module modules/mod_unixd.so
LoadModule dav_module modules/mod_dav.so
LoadModule status_module modules/mod_status.so
LoadModule autoindex_module modules/mod_autoindex.so
#LoadModule info_module modules/mod_info.so
#LoadModule cgid_module modules/mod_cgid.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule dav_svn_module modules/mod_dav_svn.so
LoadModule authz_svn_module modules/mod_authz_svn.so
#LoadModule vhost_alias_module modules/mod_vhost_alias.so
#LoadModule negotiation_module modules/mod_negotiation.so
LoadModule dir_module modules/mod_dir.so
#LoadModule actions_module modules/mod_actions.so
#LoadModule speling_module modules/mod_speling.so
#LoadModule userdir_module modules/mod_userdir.so
LoadModule alias_module modules/mod_alias.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule php5_module modules/libphp5.so

<IfModule unixd_module>
User admin
Group users
</IfModule>

# 'Main' server configuration
#
# The directives in this section set up the values used by the 'main'
# server, which responds to any requests that aren't handled by a
# <VirtualHost> definition.  These values also provide defaults for
# any <VirtualHost> containers you may define later in the file.
#
# All of these directives may appear inside <VirtualHost> containers,
# in which case these default settings will be overridden for the
# virtual host being defined.
#

#
# ServerAdmin: Your address, where problems with the server should be
# e-mailed.  This address appears on some server-generated pages, such
# as error documents.  e.g. admin@your-domain.com
#

#
# ServerName gives the name and port that the server uses to identify itself.
# This can often be determined automatically, but we recommend you specify
# it explicitly to prevent problems during startup.
#
# If your host doesn't have a registered DNS name, enter its IP address here.
#
#ServerName www.example.com:80


#
# Note that from this point forward you must specifically allow
# particular features to be enabled - so if something's not working as
# you might expect, make sure that you have specifically enabled it
# below.
#

#
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#

#
# DirectoryIndex: sets the file that Apache will serve if a directory
# is requested.
#
<IfModule dir_module>
DirectoryIndex index.html index.php index.phtml
</IfModule>

#
# The following lines prevent .htaccess and .htpasswd files from being 
# viewed by Web clients. 
#
<Files ".ht*">
	Require all denied
</Files>

LogLevel warn

#Don't modify log path!!!
ErrorLog "_logs/error_log"

<IfModule log_config_module>
	LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
	LogFormat "%h %l %u %t \"%r\" %>s %b" common

	<IfModule logio_module>
		LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
	</IfModule>

	#Don't modify log path!!!
	CustomLog "_logs/access_log" common
</IfModule>


<IfModule alias_module>
	#
	# Redirect: Allows you to tell clients about documents that used to 
	# exist in your server's namespace, but do not anymore. The client 
	# will make a new request for the document at its new location.
	# Example:
	# Redirect permanent /foo http://www.example.com/bar

	#
	# Alias: Maps web paths into filesystem paths and is used to
	# Example:
	# Alias /webpath /full/filesystem/path
	#
	# If you include a trailing / on /webpath then the server will
	# require it to be present in the URL.  You will also likely
	# need to provide a <Directory> section to allow access to
	# the filesystem path.

	#
	# ScriptAlias: This controls which directories contain server scripts. 
	# ScriptAliases are essentially the same as Aliases, except that
	# documents in the target directory are treated as applications and
	# run by the server when requested rather than as documents sent to the
	# client.  The same rules about trailing "/" apply to ScriptAlias
	# directives as to Alias.
	#
	ScriptAlias /cgi-bin/ "/mnt/VOL1/MYSQL/cgi-bin/"

</IfModule>

<IfModule cgid_module>
	#
	# ScriptSock: On threaded servers, designate the path to the UNIX
	# socket used to communicate with the CGI daemon of mod_cgid.
	#
	#Scriptsock cgisock
</IfModule>

#
# "/mnt/VOL1/MYSQL/cgi-bin" should be changed to whatever your ScriptAliased
# CGI directory exists, if you have that configured.
#
<Directory "/mnt/VOL1/MYSQL/cgi-bin">
	AllowOverride None
	Options None
	Require all granted
</Directory>

<IfModule mime_module>
	#
	# TypesConfig points to the file containing the list of mappings from
	# filename extension to MIME-type.
	#
	TypesConfig conf/mime.types

	#
	# AddType allows you to add to or override the MIME configuration
	# file specified in TypesConfig for specific file types.
	#
	#AddType application/x-gzip .tgz
	#
	# AddEncoding allows you to have certain browsers uncompress
	# information on the fly. Note: Not all browsers support this.
	#
	#AddEncoding x-compress .Z
	#AddEncoding x-gzip .gz .tgz
	#
	# If the AddEncoding directives above are commented-out, then you
	# probably should define those extensions to indicate media types:
	#
	AddType application/x-compress .Z
	AddType application/x-gzip .gz .tgz


#php
	AddType application/x-httpd-php .php
	AddType application/x-httpd-php-source .phps

	#
	# AddHandler allows you to map certain file extensions to "handlers":
	# actions unrelated to filetype. These can be either built into the server
	# or added with the Action directive (see below)
	#
	# To use CGI scripts outside of ScriptAliased directories:
	# (You will also need to add "ExecCGI" to the "Options" directive.)
	#
	#AddHandler cgi-script .cgi

	# For type maps (negotiated resources):
	#AddHandler type-map var

	#
	# Filters allow you to process content before it is sent to the client.
	#
	# To parse .shtml files for server-side includes (SSI):
	# (You will also need to add "Includes" to the "Options" directive.)
	#
	#AddType text/html .shtml
	#AddOutputFilter INCLUDES .shtml
</IfModule>

#
# The mod_mime_magic module allows the server to use various hints from the
# contents of the file itself to determine its type.  The MIMEMagicFile
# directive tells the module where the hint definitions are located.
#
#MIMEMagicFile conf/magic

#
# Customizable error responses come in three flavors:
# 1) plain text 2) local redirects 3) external redirects
#
# Some examples:
#ErrorDocument 500 "The server made a boo boo."
#ErrorDocument 404 /missing.html
#ErrorDocument 404 "/cgi-bin/missing_handler.pl"
#ErrorDocument 402 http://www.example.com/subscription_info.html
#

#
# MaxRanges: Maximum number of Ranges in a request before
# returning the entire resource, or one of the special
# values 'default', 'none' or 'unlimited'.
# Default setting is to accept 200 Ranges.
#MaxRanges unlimited

#
# EnableMMAP and EnableSendfile: On systems that support it, 
# memory-mapping or the sendfile syscall may be used to deliver
# files.  This usually improves server performance, but must
# be turned off when serving from networked-mounted 
# filesystems or if support for these functions is otherwise
# broken on your system.
# Defaults: EnableMMAP On, EnableSendfile Off
#
#EnableMMAP off
#EnableSendfile on

# Supplemental configuration
#
# The configuration files in the conf/extra/ directory can be 
# included to add extra features or to modify the default configuration of 
# the server, or you may simply copy their contents here and change as 
# necessary.

# Server-pool management (MPM specific)
#Include conf/extra/httpd-mpm.conf

# Multi-language error messages
#Include conf/extra/httpd-multilang-errordoc.conf

# Fancy directory listings
#Include conf/extra/httpd-autoindex.conf

# Language settings
#Include conf/extra/httpd-languages.conf

# User home directories
#Include conf/extra/httpd-userdir.conf

# Real-time info on requests and configuration
#Include conf/extra/httpd-info.conf

# Virtual hosts
#Include conf/extra/httpd-vhosts.conf

# Local access to the Apache HTTP Server Manual
#Include conf/extra/httpd-manual.conf

# Distributed authoring and versioning (WebDAV)
#Include conf/extra/httpd-dav.conf

# Various default settings
#Include conf/extra/httpd-default.conf

# Configure mod_proxy_html to understand HTML4/XHTML1
<IfModule proxy_html_module>
Include conf/extra/proxy-html.conf
</IfModule>

# Secure (SSL/TLS) connections
#Include conf/extra/httpd-ssl.conf
#
# Note: The following must must be present to support
#       starting without SSL on platforms with no /dev/random equivalent
#       but a statically compiled-in mod_ssl.
#
<IfModule ssl_module>
SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
</IfModule>

# Deal with user agents that deliberately violate open standards
#
<IfModule setenvif_module>
BrowserMatch "MSIE 10.0;" bad_DNT
</IfModule>
<IfModule headers_module>
RequestHeader unset DNT env=bad_DNT
</IfModule>

<IfModule mpm_prefork_module>
StartServers             5
MinSpareServers          5
MaxSpareServers         10
MaxRequestWorkers      250
MaxConnectionsPerChild   0
</IfModule>

이 내용이 있어서요

# Secure (SSL/TLS) connections
#Include conf/extra/httpd-ssl.conf
#
# Note: The following must must be present to support
#       starting without SSL on platforms with no /dev/random equivalent
#       but a statically compiled-in mod_ssl.
#

아래쪽에 내용을 설정하면  CSR생성이 되여서 가비아에 SSL CSR정보를 입력 후 등록을 할 수 있을까요?

''이제 HTTP/2 모듈을 .conf 파일에 추가하면 된다(여기서는 서버에 SSL을 적용했기 때문에 ssl.conf를 수정했다. 만약에 SSL을 사용하지 않는다면 httpd.conf를 수정하면 된다).

$sudo vim /etc/httpd/conf.d/ssl.conf

<VirtualHost _default_:443>
...
# 아래 내용 추가
LoadModule http2_module modules/mod_http2.so
Protocols h2 http/1.1 "

또는

Apache 웹 서버에 로그인하십시오. 
httpd.conf 파일 (기본 위치는 / usr / local / apache2 / conf /)을 백업하십시오. 
vi 편집기로 파일을 열고 mod_ssl 모듈 및 httpd-ssl.conf가 존재하고 주석 처리되지 않았는지 확인하십시오 
  LoadModule ssl_module 모듈 / mod_ssl.so
 conf / extra / httpd-ssl.conf 포함 
httpd-ssl.conf 파일을 사용하여 인증서 세부 정보를 구성합니다. 다음은 올바른 매개 변수가 있는지 확인해야하는 경우입니다. 
SSLCertificateFile - 이전에 다운로드 한 인증서 CRT 파일 경로 
SSLCertificateKeyFile - private.a 키 파일 경로 
SSLCertificateChainFile - ca_bundle.crt 파일 경로 

아파치(Apache httpd)에 SSL(HTTPS) 적용하기

웹사이트에 SSL 보안 적용하기 2. 웹서버에 https 적용하기

서버 관련 경험이 없으시면 웹호스팅 혹은 웹서버 관리자에게 문의하시는 게 가장 수월할 듯합니다.

고맙습니다.

질문의 요지를 잘 파악하질 못하겠습니다.

SSL 인증서는 인증서 파일을 서버에 업로드한 후 아파치(Apache) 등 웹서버 설정을 변경해주셔야 합니다.

워드프레스 등의 php 파일을 변경하시는 게 아닙니다. (워드프레스 플러그인으로도 안됩니다.)

웹호스팅 혹은 웹서버 관리자에게 SSL 인증서 설치를 요청하셔야 할 듯합니다.

SSL 인증서 설치를 서버에 완료 한 다음에

워드프레스 관리자 -> 설정 메뉴에서 홈페이지 주소를 https로 변경해주시면 됩니다.

그리고 프로그램 코드를 올려주실 땐 글쓰기 에디터의 "코드 스니펫 삽입"기능으로 올려주시길 부탁드립니다.

고맙습니다.