Hey guys,

Okay I'm getting really frustrated w/ this issue. I have a domain "domain.com" and a subdomain "portal.domain.com"

My records are as follows:

A: @, IP
A: portal, IP
NS: the 3 default NSs.

My httpd.conf looks like this:

ServerRoot "/etc/httpd"
Listen 80
Include conf.modules.d/*.conf

User apache
Group apache

ServerAdmin root@localhost

NameVirtualHost *:80

ServerName www.domain.com
ServerAlias domain.com

<Directory />
    AllowOverride none
    Require all denied
</Directory>
DocumentRoot "/var/www/html"
<Directory "/var/www">
    AllowOverride None
    # Allow open access:
    Require all granted
</Directory>

<Directory "/var/www/html">

    Options Indexes FollowSymLinks
    AllowOverride None
    Require all granted
</Directory>

<IfModule dir_module>
    DirectoryIndex index.html
</IfModule>

<Files ".ht*">
    Require all denied
</Files>

ErrorLog "logs/error_log"

LogLevel warn

<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>

       CustomLog "logs/access_log" combined
</IfModule>

<IfModule alias_module>

    ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"

</IfModule>


<Directory "/var/www/cgi-bin">
    AllowOverride None
    Options None
    Require all granted
</Directory>
</VirtualHost>
<IfModule mime_module>
    TypesConfig /etc/mime.types
    AddType application/x-compress .Z
    AddType application/x-gzip .gz .tgz
    AddType text/html .shtml
    AddOutputFilter INCLUDES .shtml
</IfModule>

AddDefaultCharset UTF-8

<IfModule mime_magic_module>

    MIMEMagicFile conf/magic
</IfModule>

EnableSendfile on

# Supplemental configuration
#
# Load config files in the "/etc/httpd/conf.d" directory, if any.
IncludeOptional conf.d/*.conf

This is the default httpd.conf that came w/ httpd on CentOS7. I haven't modified it in anyway aside from adding the "NameVirtualHost *:80" line.

My additional conf file is in /conf.d/ and looks like this:

# --
# added for OTRS (http://otrs.org/)
# --
<VirtualHost *:80>
ServerName portal.domain.com
DocumentRoot "/opt/otrs/bin/cgi-bin/"
ScriptAlias /otrs/ "/opt/otrs/bin/cgi-bin/"
Alias /otrs-web/ "/opt/otrs/var/httpd/htdocs/"

<IfModule mod_perl.c>

    # Setup environment and preload modules
    Perlrequire /opt/otrs/scripts/apache2-perl-startup.pl

    # Reload Perl modules when changed on disk
    PerlModule Apache2::Reload
    PerlInitHandler Apache2::Reload

    # general mod_perl2 options
    <Location /otrs>
#        ErrorDocument 403 /otrs/customer.pl
        ErrorDocument 403 /otrs/index.pl
        SetHandler  perl-script
        PerlResponseHandler ModPerl::Registry
        Options +ExecCGI
        PerlOptions +ParseHeaders
        PerlOptions +SetupEnv

        <IfModule mod_version.c>
            <IfVersion < 2.4>
                Order allow,deny
                Allow from all
            </IfVersion>
            <IfVersion >= 2.4>
                Require all granted
            </IfVersion>
        </IfModule>
        <IfModule !mod_version.c>
            Order allow,deny
            Allow from all
        </IfModule>
    </Location>

    # mod_perl2 options for GenericInterface
    <Location /otrs/nph-genericinterface.pl>
        PerlOptions -ParseHeaders
    </Location>

</IfModule>

<Directory "/opt/otrs/bin/cgi-bin/">
    AllowOverride None
    Options +ExecCGI -Includes

    <IfModule mod_version.c>
        <IfVersion < 2.4>
            Order allow,deny
            Allow from all
        </IfVersion>
        <IfVersion >= 2.4>
            Require all granted
        </IfVersion>
    </IfModule>
    <IfModule !mod_version.c>
        Order allow,deny
        Allow from all
    </IfModule>

    <IfModule mod_filter.c>
        <IfModule mod_deflate.c>
            AddOutputFilterByType DEFLATE text/html text/javascript application/javascript text/css text/xml application/json text/json
         </IfModule>
    </IfModule>

</Directory>

<Directory "/opt/otrs/var/httpd/htdocs/">
    AllowOverride None

    <IfModule mod_version.c>
        <IfVersion < 2.4>
            Order allow,deny
            Allow from all
        </IfVersion>
        <IfVersion >= 2.4>
            Require all granted
        </IfVersion>
    </IfModule>
    <IfModule !mod_version.c>
        Order allow,deny
        Allow from all
    </IfModule>

    <IfModule mod_filter.c>
        <IfModule mod_deflate.c>
            AddOutputFilterByType DEFLATE text/html text/javascript application/javascript text/css text/xml application/json text/json
         </IfModule>
    </IfModule>

    # Make sure CSS and JS files are read as UTF8 by the browsers.
    AddCharset UTF-8 .css
    AddCharset UTF-8 .js

    # Set explicit mime type for woff fonts since it is relatively new and apache may not know about it.
    AddType application/font-woff .woff

</Directory>

<IfModule mod_headers.c>
    # Cache css-cache for 30 days
    <Directory "/opt/otrs/var/httpd/htdocs/skins/*/*/css-cache">
        <FilesMatch "\.(css|CSS)$">
            Header set Cache-Control "max-age=2592000 must-revalidate"
        </FilesMatch>
    </Directory>

    # Cache css thirdparty for 4 hours, including icon fonts
    <Directory "/opt/otrs/var/httpd/htdocs/skins/*/*/css/thirdparty">
        <FilesMatch "\.(css|CSS|woff|svg)$">
            Header set Cache-Control "max-age=14400 must-revalidate"
        </FilesMatch>
    </Directory>

    # Cache js-cache for 30 days
    <Directory "/opt/otrs/var/httpd/htdocs/js/js-cache">
        <FilesMatch "\.(js|JS)$">
            Header set Cache-Control "max-age=2592000 must-revalidate"
        </FilesMatch>
    </Directory>

    # Cache js thirdparty for 4 hours
    <Directory "/opt/otrs/var/httpd/htdocs/js/thirdparty/">
        <FilesMatch "\.(js|JS)$">
            Header set Cache-Control "max-age=14400 must-revalidate"
        </FilesMatch>
    </Directory>
</IfModule>
</VirtualHost>
# Limit the number of requests per child to avoid excessive memory usage
MaxRequestsPerChild 4000

This is the default OTRS conf file aside from me adding the VirtualHost and the servername.

Using this setup, both the portal.domain.com and domain.com point to domain.com. I can't access my OTRS from either location anymore using this setup. If I remove the VirtualHost info from the OTRS config file then I'm able to access the OTRS using domain.com/otrs/index.pl but both domain and subdomain still point to domain.com

Can someone please help me figure this out? Thank you!