Like Like. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email.
Notify me of new posts via email. Search for:. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public. Applications that know how to communicate with a proxy can be configured to use Not all applications know how to use a proxy.
If anybody gets access to the proxy they will be able to access any site on the Internet masqueraded as you. If the wrong people get access, your site might end up being black listed because of their mischievous deeds. I can't get apache to start with it outside — blarg. ShaunMcDonald ProxyPass is not allowed in. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.
Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Members are added to a balancer using BalancerMember. DNS resolution happens when the socket to the origin domain is created for the first time. When connection reuse is enabled, each backend domain is resolved only once per child process, and cached for all further connections until the child is recycled.
This information should to be considered while planning DNS maintenance tasks involving backend domains. Please also check ProxyPass parameters for more details about connection reuse.
Strictly limiting access is essential if you are using a forward proxy using the ProxyRequests directive. Otherwise, your server can be used by any client to access arbitrary hosts while hiding his or her true identity. This is dangerous both for your network and for the Internet at large. When using a reverse proxy using the ProxyPass directive with ProxyRequests Off , access control is less critical because clients can only contact the hosts that you have specifically configured.
See Also the Proxy-Chain-Auth environment variable. If you're using the ProxyBlock directive, hostnames' IP addresses are looked up and cached during startup for later match test.
This may take a few seconds or more depending on the speed with which the hostname lookups occur. An Apache httpd proxy server situated in an intranet needs to forward external requests through the company's firewall for this, configure the ProxyRemote directive to forward the respective scheme to the firewall proxy.
However, when it has to access resources within the intranet, it can bypass the firewall when accessing hosts. The NoProxy directive is useful for specifying which hosts belong to the intranet and should be accessed directly. Some commercial proxy servers let them get away with this and simply serve the request, implying a configured local domain.
When the ProxyDomain directive is used and the server is configured for proxy service , Apache httpd can return a redirect response and send the client to the correct, fully qualified, server address. This is the preferred method since the user's bookmark files will then contain fully qualified hosts.
These are set via the SetEnv directive. These are the force-proxy-request Some request methods such as POST include a request body. The HTTP protocol requires that requests which include a body either use chunked transfer encoding or send a Content-Length request header.
But if the body is large and the original request used chunked encoding, then chunked encoding may also be used in the upstream request. You can control this selection using environment variables. Setting proxy-sendcl ensures maximum compatibility with upstream servers by always sending the Content-Length , while setting proxy-sendchunked minimizes resource usage by using chunked encoding. Under some circumstances, the server must spool request bodies to disk to satisfy the requested handling of request bodies.
This spooling can also occur if the request body already has a Content-Length header, but the server is configured to filter incoming request bodies.
LimitRequestBody only applies to request bodies that the server will spool to disk. These headers are:. Be careful when using these headers on the origin server, since they will contain more than one comma-separated value if the original request already contained one of these headers.
Note: If you need to specify custom request headers to be added to the forwarded request, use the RequestHeader directive. This directive allows for growth potential in the number of Balancers available for a virtualhost in addition to the number pre-configured. It only takes effect if there is at least one pre-configured Balancer.
This can cause issues and inconsistent behavior if using the Balancer Manager and so should be disabled if using that feature. This directive adds a member to a load balancing group. One additional parameter is available only to BalancerMember directives: loadfactor. This is the member load factor - a decimal number between 1.
It corresponds to the url of a balancer defined in ProxyPass directive. This directive will cause the shared memory storage associated with the balancers and balancer members to be persisted across restarts.
This directive is only useful for Apache httpd proxy servers within intranets. A request to a host which matches one or more of these is always served directly, without forwarding to the configured ProxyRemote proxy server s. The host arguments to the NoProxy directive are one of the following type list:. A Domain is a partially qualified DNS domain name, preceded by a period. It represents a list of hosts which logically belong to the same DNS domain or zone i.
Domain name comparisons are done without regard to the case, and Domain s are always assumed to be anchored in the root of the DNS tree; therefore, the two domains. Since a domain comparison does not involve a DNS lookup, it is much more efficient than subnet comparison.
A SubNet is a partially qualified internet address in numeric dotted quad form, optionally followed by a slash and the netmask, specified as the number of significant bits in the SubNet.
It is used to represent a subnet of hosts which can be reached over a common network interface. In the absence of the explicit net mask it is assumed that omitted or zero valued trailing digits specify the mask. In this case, the netmask can only be multiples of 8 bits wide. A IPAddr represents a fully qualified internet address in numeric dotted quad form. Usually, this address represents a host, but there need not necessarily be a DNS domain name connected with the address.
It represents a logical host in contrast to Domain s, see above and must be resolvable to at least one IPAddr or often to a list of hosts with different IPAddr s.
Name resolution in Apache httpd can take a remarkable deal of time when the connection to the name server uses a slow PPP link. Hostname comparisons are done without regard to the case, and Hostname s are always assumed to be anchored in the root of the DNS tree; therefore, the two hosts WWW.
Shell-style wildcards are allowed. For example, the following will allow only hosts in yournetwork. The following example will process all files in the foo directory of example. A backend URL matches the configuration section if it begins with the the wildcard-url string, even if the last path segment in the directive only matches a prefix of the backend URL.
The following arguments are possible:. The proxy module will also attempt to determine IP addresses of list items which may be hostnames during startup, and cache them for match test as well. That may slow down the startup time of the server. The ProxyDomain directive specifies the default domain which the apache proxy server will belong to.
If a request to a host without a domain name is encountered, a redirection response to the same host with the configured Domain appended will be generated. This directive is useful for reverse-proxy setups where you want to have a common look and feel on the error pages seen by the end user. Default behavior would display the error page of the proxied server.
Turning this on shows the SSI Error message. This directive does not affect the processing of informational 1xx , normal success 2xx , or redirect 3xx responses. By default ProxyErrorOverride affects all responses with codes between including and excluding. To change the default behavior, you can specify the status codes to consider, separated by spaces. If you do so, all other status codes will be ignored. You can only specify status codes, that are considered error codes: between including and excluding.
The ProxyIOBufferSize directive adjusts the size of the internal buffer which is used as a scratchpad for the data between input and output. The size must be at least Values larger than are set to If you change it from the default, you must also change the packetSize attribute of your AJP connector on the Tomcat side! The attribute packetSize is only available in Tomcat 5. Normally it is not necessary to change the maximum packet size.
Problems with the default value have been reported when sending certificates or certificate chains. From 2. In order to prevent confusion, numbered unnamed backreferences are ignored. Use named groups instead. The ProxyMaxForwards directive specifies the maximum number of proxies through which a request may pass if there's no Max-Forwards header supplied with the request. This may be set to prevent infinite proxy loops or a DoS attack.
Earlier Apache httpd versions would always set it.
0コメント