一.环境:
centos6.7 x86_64 位最小化安装
[root@cacti conf.d]# cat /etc/redhat-release 
CentOS release 6.7 (Final)
[root@cacti conf.d]# uname -a
Linux cacti 2.6.32-573.el6.x86_64 #1 SMP Thu Jul 23 15:44:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

httpd是 yum 安装
yum install httpd -y

[root@cacti conf.d]# httpd -v
Server version: Apache/2.2.15 (Unix)
Server built: Jul 18 2016 15:24:00

二.apache httpd.conf 配置文件配置允许特定的IP访问网站

配置如下：
User apache
Group apache
ServerAdmin root@localhost
ServerName 127.0.0.1:80
UseCanonicalName Off
DocumentRoot "/var/www/html"
<Directory />
Options FollowSymLinks
AllowOverride None
Order deny,allow
Deny from all
Allow from 124.207.48.224
Allow from 192.168.1.10
Allow from 121.69.37.66 
Allow from 192.168.10.100
</Directory>

先拒绝所有：Deny from all 后面加上所允许的特定IP地址访问 /var/www/html 这个目录下的内容。

[root@cacti conf.d]# cat /etc/httpd/conf/httpd.conf
ServerTokens Prod
ServerRoot "/etc/httpd"
PidFile run/httpd.pid
Timeout 60
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15
<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
</IfModule>
<IfModule worker.c>
StartServers 4
MaxClients 300
MinSpareThreads 25
MaxSpareThreads 75 
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
#Listen 80
LoadModule auth_basic_module modules/mod_auth_basic.so
LoadModule auth_digest_module modules/mod_auth_digest.so
LoadModule authn_file_module modules/mod_authn_file.so
LoadModule authn_alias_module modules/mod_authn_alias.so
LoadModule authn_anon_module modules/mod_authn_anon.so
LoadModule authn_dbm_module modules/mod_authn_dbm.so
LoadModule authn_default_module modules/mod_authn_default.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_user_module modules/mod_authz_user.so
LoadModule authz_owner_module modules/mod_authz_owner.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_dbm_module modules/mod_authz_dbm.so
LoadModule authz_default_module modules/mod_authz_default.so
LoadModule ldap_module modules/mod_ldap.so
LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
LoadModule include_module modules/mod_include.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule logio_module modules/mod_logio.so
LoadModule env_module modules/mod_env.so
LoadModule ext_filter_module modules/mod_ext_filter.so
LoadModule mime_magic_module modules/mod_mime_magic.so
LoadModule expires_module modules/mod_expires.so
LoadModule deflate_module modules/mod_deflate.so
LoadModule headers_module modules/mod_headers.so
LoadModule usertrack_module modules/mod_usertrack.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule mime_module modules/mod_mime.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 dav_fs_module modules/mod_dav_fs.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 substitute_module modules/mod_substitute.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule cache_module modules/mod_cache.so
LoadModule suexec_module modules/mod_suexec.so
LoadModule disk_cache_module modules/mod_disk_cache.so
LoadModule cgi_module modules/mod_cgi.so
LoadModule version_module modules/mod_version.so

Include conf.d/*.conf
User apache
Group apache
ServerAdmin root@localhost
ServerName 127.0.0.1:80
UseCanonicalName Off
DocumentRoot "/var/www/html"
<Directory />
    Options FollowSymLinks
    AllowOverride None
    Order deny,allow
    Deny from all
      Allow from 124.207.48.234
      Allow from 211.144.69.249
      Allow from 121.69.17.66 
      Allow from 61.135.194.49 
</Directory>

<IfModule mod_userdir.c>
#

UserDir is disabled by default since it can confirm the presence

# of a username on the system (depending on home directory
# permissions).
#
UserDir disabled
#
# To enable requests to /~user/ to serve the user's public_html
# directory, remove the "UserDir disabled" line above, and uncomment
# the following line instead:
# 
#UserDir public_html

</IfModule>
DirectoryIndex index.html index.html.var index.jsp
<Files ~ "^.ht">
Order allow,deny
Deny from all
Satisfy All
</Files>
TypesConfig /etc/mime.types
DefaultType text/plain
<IfModule mod_mime_magic.c>
MIMEMagicFile conf/magic
</IfModule>
HostnameLookups Off
ErrorLog logs/error_log
LogLevel warn
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent
CustomLog logs/access_log combined
ServerSignature off
Alias /icons/ "/var/www/icons/"
<Directory "/var/www/icons">
Options Indexes MultiViews FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
<IfModule mod_dav_fs.c>

Location of the WebDAV lock database.

DAVLockDB /var/lib/dav/lockdb

</IfModule>
ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"
<Directory "/var/www/cgi-bin">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>
IndexOptions FancyIndexing VersionSort NameWidth= HTMLTable Charset=UTF-8
AddIconByEncoding (CMP,/icons/compressed.gif) x-compress x-gzip
AddIconByType (TXT,/icons/text.gif) text/
AddIconByType (IMG,/icons/image2.gif) image/
AddIconByType (SND,/icons/sound2.gif) audio/
AddIconByType (VID,/icons/movie.gif) video/
AddIcon /icons/binary.gif .bin .exe
AddIcon /icons/binhex.gif .hqx
AddIcon /icons/tar.gif .tar
AddIcon /icons/world2.gif .wrl .wrl.gz .vrml .vrm .iv
AddIcon /icons/compressed.gif .Z .z .tgz .gz .zip
AddIcon /icons/a.gif .ps .ai .eps
AddIcon /icons/layout.gif .html .shtml .htm .pdf
AddIcon /icons/text.gif .txt
AddIcon /icons/c.gif .c
AddIcon /icons/p.gif .pl .py
AddIcon /icons/f.gif .for
AddIcon /icons/dvi.gif .dvi
AddIcon /icons/uuencoded.gif .uu
AddIcon /icons/script.gif .conf .sh .shar .csh .ksh .tcl
AddIcon /icons/tex.gif .tex
AddIcon /icons/bomb.gif /core
AddIcon /icons/back.gif ..
AddIcon /icons/hand.right.gif README
AddIcon /icons/folder.gif ^^DIRECTORY^^
AddIcon /icons/blank.gif ^^BLANKICON^^
DefaultIcon /icons/unknown.gif
ReadmeName README.html
HeaderName HEADER.html
IndexIgnore .?? ~ # HEADER README RCS CVS ,v ,t
AddLanguage ca .ca
AddLanguage cs .cz .cs
AddLanguage da .dk
AddLanguage de .de
AddLanguage el .el
AddLanguage en .en
AddLanguage eo .eo
AddLanguage es .es
AddLanguage et .et
AddLanguage fr .fr
AddLanguage he .he
AddLanguage hr .hr
AddLanguage it .it
AddLanguage ja .ja
AddLanguage ko .ko
AddLanguage ltz .ltz
AddLanguage nl .nl
AddLanguage nn .nn
AddLanguage no .no
AddLanguage pl .po
AddLanguage pt .pt
AddLanguage pt-BR .pt-br
AddLanguage ru .ru
AddLanguage sv .sv
AddLanguage zh-CN .zh-cn
AddLanguage zh-TW .zh-tw
LanguagePriority en ca cs da de el eo es et fr he hr it ja ko ltz nl nn no pl pt pt-BR ru sv zh-CN zh-TW
ForceLanguagePriority Prefer Fallback
AddDefaultCharset off
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz
AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crl
AddType application/x-httpd-php .asp .py .pl .bop .foo .133t .jsp .com

AddHandler type-map var
AddType text/html .shtml

AddOutputFilter INCLUDES .shtml
Alias /error/ "/var/www/error/"
<IfModule mod_negotiation.c>
<IfModule mod_include.c>
<Directory "/var/www/error">
AllowOverride None
Options IncludesNoExec
AddOutputFilter Includes html
AddHandler type-map var
Order allow,deny
Allow from all
LanguagePriority en es de fr
ForceLanguagePriority Prefer Fallback
</Directory>
</IfModule>
</IfModule>
BrowserMatch "Mozilla/2" nokeepalive
BrowserMatch "MSIE 4.0b2;" nokeepalive downgrade-1.0 force-response-1.0
BrowserMatch "RealPlayer 4.0" force-response-1.0
BrowserMatch "Java/1.0" force-response-1.0
BrowserMatch "JDK/1.0" force-response-1.0
BrowserMatch "Microsoft Data Access Internet Publishing Provider" redirect-carefully
BrowserMatch "MS FrontPage" redirect-carefully
BrowserMatch "^WebDrive" redirect-carefully
BrowserMatch "^WebDAVFS/1.[0123]" redirect-carefully
BrowserMatch "^gnome-vfs/1.0" redirect-carefully
BrowserMatch "^XML Spy" redirect-carefully
BrowserMatch "^Dreamweaver-WebDAV-SCM1" redirect-carefully

Listen 80
NameVirtualHost :80
<VirtualHost :80>
ServerAdmin webmaster@dianrui.com
DocumentRoot /var/www/html
ServerName 201.195.2.245
ServerAlias 201.195.2.245
</VirtualHost>

三.vhost虚拟主机通过指定不同的端口来提供不同的服务:
vhost虚拟主机配置格式如下：

Listen 10300
NameVirtualHost *:10300
<VirtualHost *:10300>
ServerName 201.195.10.245:10300
DocumentRoot "/var/www/html/itop"
</VirtualHost>

Listen 10400
NameVirtualHost *:10400
<VirtualHost *:10400>
ServerName 201.195.10.245:10400
DocumentRoot "/var/www/html/kjxw_zabbix"
</VirtualHost>

四.vhost虚拟主机通过不同的域名指向不同的web站点来提供不同的服务

#<VirtualHost 201.195.10.245:80>#        ServerName www.juchangyuan.cn#        ServerAlias juchangyuan.cn#        DocumentRoot /var/www/html/zixunweb/zixun3#        <Directory "/var/www/html/zixunweb/zixun3">#                Options Indexes FollowSymLinks#                AllowOverride None#                Order allow,deny  #                Allow from all  #        </Directory>#</VirtualHost>
#tj#<VirtualHost 201.195.10.245:80>#        ServerName www.newonecity.com.cn#        ServerAlias newonecity.com.cn#        DocumentRoot /var/www/html/zixunweb/tj#        <Directory "/var/www/html/zixunweb/tj">#                Options Indexes FollowSymLinks#                AllowOverride All#                Order allow,deny  #                Allow from all  #        </Directory>#</VirtualHost>