Proxy Context
Table of Contents
URI | Web Server | Header Operations | Realm | Authentication Name | Require (Authorized Users/Groups) | Access Allowed | Access Denied | Authorizer | Add Default Charset | Customized Default Charset | Cache Stale Age (seconds) | Publicly Cache All | Cache Expire Time (seconds) | Privately Cache All | Private Cache Expire Time (seconds) | Micro Cache 5XX Response | Enable GeoLocation Lookup | Enable PageSpeed Optimization | PageSpeed Settings
Proxy Context⇑
Description
A Proxy Context enables this virtual host as a transparent reverse proxy server. This proxy server can run in front of any web servers or application servers that support HTTP protocol. The External web server that this virtual host proxies for has to be defined in External Apps before you can set up a Proxy Context.
URI⇑
Description
Specifies the URI for this context.
Syntax
The URI can be a plain URI (starting with "/") or a Perl compatible regular expression URI (starting with "exp:"). If a plain URI ends with a "/", then this context will include all sub-URIs under this URI. If the context maps to a directory on the file system, a trailing "/" must be added.
See Also
Web Server⇑
Description
Specifies the name of the external web server. This external web server must be defined in the External Apps section at the server or virtual host level.
Syntax
Select from drop down list
Header Operations⇑
Description
Specifies additional response/request headers to be added. Multiple header directives can be added with one directive per line. "NONE" can be used to disable parent header inheritance. If no directive is provided 'Header' is assumed.
Syntax
[Header]|RequestHeader [condition] set|append|merge|add|unset header [value] [early|env=[!]variable]
Example
append Cache-control no-store
Header set My-header cust_header_val
RequestHeader set My-req-header cust_req_header_val
Tips
Syntax and usage are similar to Apache's mod_headers directives for supported operations.
The 'Header' directive is is optional and can be excluded or left in when copying rules from elsewhere without issue.
Realm⇑
Description
Specifies the authorization realm for this context. When specified, a valid username and password must be provided in order to access this context. Authorization Realms are set up in the Virtual Host Security section. This setting uses each realm's Realm Name.
Syntax
Select from drop down list
Authentication Name⇑
Description
Specifies an alternative name for the authorization realm for the current context. If not specified, the original realm name will be used. The authentication name is displayed on the browser's login pop-up.
Require (Authorized Users/Groups)⇑
Description
Specifies which user/group can access this context. This allows you to use one user/group database (specified in Realm) across a number of contexts, but only allow certain users/groups from that database to access this context.
Syntax
Syntax is compatible with Apache's Require directive. For example:
- user username [username ...]
Only listed users can access this context. - group groupid [groupid ...]
Only users belonging to the listed groups can access this context.
Access Allowed⇑
Description
Specifies which IPs or sub-networks are allowed to access resources under this context. Together with Access Denied and server/virtual host level access control, accessibility is determined by the smallest scope that a client's IP address falls into.
Syntax
Comma-delimited list of IPs/sub-networks.
Example
Access Denied⇑
Description
Specifies which IPs or sub-networks are NOT allowed to access resources under this context. Together with Access Allowed and server/virtual host-level access control, accessibility is determined by the smallest scope that a client's IP address falls into.
Syntax
Comma-delimited list of IPs/sub-networks.
Example
Authorizer⇑
Description
Specifies an external application that can be used to generate authorized/unauthorized decisions. Currently, only the FastCGI Authorizer is available. For more details about the FastCGI Authorizer role, please visit http://www.fastcgi.com.
Syntax
Select from drop down list
Add Default Charset⇑
Description
Specifies whether to add a character set tag to the "Content-Type" response header, when content type is either "text/html" or "text/plain" without any parameters. When set to Off, this function is disabled. When set to On, either the character set specified by Customized Default Charset or the default "iso-8859-1" will be added.
Syntax
Select from radio box
Customized Default Charset⇑
Description
Specifies a character set to be used when Add Default Charset is On. This is optional. The default value is iso-8859-1. This entry has no effect when Add Default Charset is Off.
Syntax
Name of a character set.
Example
Cache Stale Age (seconds)⇑
Description
Specifies how long an object will continue to be served from cache after it has expired but before a new cached copy is available. The default is "10" seconds.
Syntax
Integer number
Publicly Cache All⇑
Description
Publicly cache all URLs served under the current context (server, virtual host, or context level).
Virtual hosts configured through Apache's httpd.conf can use the "CacheEnable" and "CacheDisable" directives at the server, virtual host, context, file, and location level or in .htaccess. "CacheEnable" and "CacheDisable" directives are compatible with Apache mod_cache directives. However, when used at the context, file, or location level, or in .htaccess, "CacheEnable" and "CacheDisable" will only be applied to directories below the current level. URL parameters will be ignored.
Syntax
Select from radio box
Tips
Disabled by default. Do not enabled this setting if you are using any LSCache plugins.
Cache Expire Time (seconds)⇑
Description
Specifies how long an object will be cached. The default is "86400" seconds (one day).
Syntax
Integer number
Privately Cache All⇑
Description
Privately cache all URLs served under the current context (server, virtual host, or context level).
A separate cached copy will be made per user based on their IP and set cookies.
Virtual hosts configured through Apache's httpd.conf can use the "CacheEnable private /url" and "CacheDisable private /url" directives at server, virtual host, directory, file, and location levels or in a .htaccess file. "CacheEnable private" and "CacheDisable private" are compatible with Apache's mod_cache directives and will be applied to all directories below the current level. However, when used at the directory, file, or location level, or in a .htaccess file, "CacheEnable private" and "CacheDisable private" will only be applied to directories below the current level. URL parameters will be ignored.
Syntax
Select from radio box
Tips
Disabled by default. Do not enabled this setting if you are using any LSCache plugins.
Private Cache Expire Time (seconds)⇑
Description
Specifies how long an object will be cached in private cache. The default is "60" seconds.
Syntax
Integer number
Micro Cache 5XX Response⇑
Description
Cache pages responding with HTTP status code 5xx (500, 503, etc) for 10 seconds when the cache response header indicates that the page is cacheable.
Default values:
Server level: Yes
VH level: Inherit Server level setting
Context-level Inherit VH level setting
Syntax
Select from radio box
Tips
Enabling this setting is useful for avoiding bad requests but can also act as some added DDoS protection.
Enable GeoLocation Lookup⇑
Description
Enterprise Edition Only Specifies whether to enable/disable IP Geolocation lookup. Can be set at server, virtual host, or context level. IP Geolocation is disabled by default when using value "Not Set".
Syntax
Select from radio box
See Also
Enable PageSpeed Optimization⇑
Description
Choose whether or not to enable PageSpeed optimization.
Syntax
Select from radio box
Tips
This can be set at the Server Level and overridden at the Virtual Host and Context Levels. Context Level settings will override Virtual Host Level settings.
PageSpeed Settings⇑
Description
Set parameters using Google default filter sets.
Example
pagespeed FileCachePath /tmp/lshttpd/pagespeed;
pagespeed RewriteLevel CoreFilters;