How to password-protect, Allow or Deny a visitor based on a condition. If you are having trouble getting htaccess-based password protection to work see: Troubleshooting htaccess Authentication: Getting it to work
Generate Your authentication htpasswd files with my free Online Password Generator!
Order deny,allow Deny from all AuthName "htaccess password prompt" AuthType Basic AuthUserFile /web/askapache.com/.htpasswd Require valid-user
Order deny,allow Deny from all AuthName "htaccess password prompt" AuthUserFile /.htpasswd AuthType basic Require valid-user
Order deny,allow Deny from all Allow from 10.1.0.0/255.255.0.0
Order deny,allow Deny from all Allow from 10.1.2.3
Order deny,allow Deny from all Allow from 192.168.1.104 192.168.1.205
Order deny,allow Deny from all Allow from 10.1 Allow from 10 172.20 192.168.2
Order deny,allow Deny from all Allow from 10.1.0.0/16
Order deny,allow Deny from all Allow from 2001:db8::a00:20ff:fea7:ccea Allow from 2001:db8::a00:20ff:fea7:ccea/10
Order Allow,Deny Allow from apache.org Deny from wireshark.apache.org
Order deny,allow Deny from all AuthName "htaccess password prompt" AuthUserFile /web/askapache.com/.htpasswd AuthType Basic Require valid-user Allow from 172.17.10.1 Satisfy Any
I use this when I start a new site, and uncomment or delete parts of the file depending on the sites needs
#
# DEFAULT SETTINGS
#
Options +ExecCGI -Indexes
DirectoryIndex index.php index.html index.htm
ErrorDocument 400 /cgi-bin/error.php
ErrorDocument 401 /cgi-bin/error.php
ErrorDocument 403 /cgi-bin/forbidden.cgi
ErrorDocument 404 /404.html
ErrorDocument 405 /cgi-bin/error.php
ErrorDocument 406 /cgi-bin/error.php
ErrorDocument 409 /cgi-bin/error.php
ErrorDocument 413 /cgi-bin/error.php
ErrorDocument 414 /cgi-bin/error.php
ErrorDocument 500 /cgi-bin/error.php
ErrorDocument 501 /cgi-bin/error.php
### DEFAULTS
ServerSignature Off
AddType video/x-flv .flv
AddType application/x-shockwave-flash .swf
AddType image/x-icon .ico
AddDefaultCharset UTF-8
AddLanguage en-US .html .htm .txt .xml .php
SetEnv TZ America/Las_Vegas
SetEnv SERVER_ADMIN webmaster@askapache.com
### PHPINI-CGI
#AddHandler php-cgi .php
#Action php-cgi /cgi-bin/php5.cgi
### FAST-CGI
#AddHandler fastcgi-script .fcg .fcgi .fpl
#AddHandler php5-fastcgi .php
#Action php5-fastcgi /cgi-bin/fastcgi.fcgi
#
# HEADERS and CACHING
#
# 1 YEAR
Header set Cache-Control "max-age=29030400, public"
# 1 WEEK
Header set Cache-Control "max-age=604800, public"
# 3 HOUR
Header set Cache-Control "max-age=10800"
# 1 MIN
Header set Cache-Control "max-age=0, private, no-store, no-cache, must-revalidate"
Header set P3P "policyref="/w3c/p3p.xml", CP="NOI DSP COR NID CUR ADM DEV OUR BUS""
Header set imagetoolbar "no"
#
# REWRITES AND REDIRECTS
#
### SEO REDIRECTS
#Redirect 301 /ssl-ns.html /2006/htaccess/apache-ssl-in-htaccess-examples.html
#Redirect 301 /ht.tml
#Redirect 301 /index.html /
#RedirectMatch 301 /2006/htaccess-forum/(.*) /2006/htaccess/$1
#RedirectMatch 301 /(.*)rfc2616(.*) http://rfc.askapache.com/rfc2616/rfc2616.html
#RedirectMatch 301 /phpmanual(.*) /manual/en/$1
### REWRITES
RewriteEngine On
RewriteBase /
### WORDPRESS
#
#RewriteEngine On
#RewriteBase /
#RewriteCond %{REQUEST_FILENAME} !-f
#RewriteCond %{REQUEST_FILENAME} !-d
#RewriteRule . /index.php [L]
#
### REQUIRE WWW
#RewriteCond %{HTTP_HOST} !^www\.askapache\.com$ [NC]
#RewriteRule ^(.*)$ /$1 [R=301,L]
### STOP LOOP CODE
#RewriteCond %{ENV:REDIRECT_STATUS} 200
#RewriteRule ^.*$ - [L]
### REDIRECT BLOG FEED TO FEEDBURNER
#RewriteCond %{HTTP_USER_AGENT} !^.*(FeedBurner|FeedValidator|Recent) [NC]
#RewriteRule ^feed/?.*$ http://feeds.feedburner.com/apache/htaccess [L,R=302]
### BLOCK WGET
#RewriteCond %{HTTP_USER_AGENT} ^Wget.* [NC]
#RewriteRule .* /cgi-bin/forbidden.cgi [L]
#
# AUTHENTICATION
#
### BASIC PASSWORD PROTECTION
#AuthName "Prompt"
#AuthUserFile /web/askapache.com/.htpasswd
#AuthType basic
#Require valid-user
### UNDER CONSTRUCTION PROTECTION
#AuthName "Under Development"
#AuthUserFile /web/askapache.com/.htpasswd
#AuthType basic
#Require valid-user
#Order Deny,Allow
#Deny from all
#Allow from 23.23.23.1 w3.org googlebot.com google.com google-analytics.com
#Satisfy Any