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* * Complete Request Object Reference Manual](#) * * * The ServerVariables Collection is used to retrieve the values of server variables. ## Syntax Request.ServerVariables (server_variable) | Parameter | Description | | --- | --- | | server_variable | Required. The name of the (#) to retrieve. | ### (#) | Variable | Description | | --- | --- | | ALL_HTTP | Returns all HTTP headers sent by the client. Always prefixed with HTTP_ and capitalized | | ALL_RAW | Returns all headers in raw form | | APPL_MD_PATH | Returns the meta base path for the application for the ISAPI DLL | | APPL_PHYSICAL_PATH | Returns the physical path corresponding to the meta base path | | AUTH_PASSWORD | Returns the value entered in the client's authentication dialog | | AUTH_TYPE | The authentication method that the server uses to validate users | | AUTH_USER | Returns the raw authenticated user name | | CERT_COOKIE | Returns the unique ID for client certificate as a string | | CERT_FLAGS | bit0 is set to 1 if the client certificate is present and bit1 is set to 1 if the cCertification authority of the client certificate is not valid | | CERT_ISSUER | Returns the issuer field of the client certificate | | CERT_KEYSIZE | Returns the number of bits in Secure Sockets Layer connection key size | | CERT_SECRETKEYSIZE | Returns the number of bits in server certificate private key | | CERT_SERIALNUMBER | Returns the serial number field of the client certificate | | CERT_SERVER_ISSUER | Returns the issuer field of the server certificate | | CERT_SERVER_SUBJECT | Returns the subject field of the server certificate | | CERT_SUBJECT | Returns the subject field of the client certificate | | CONTENT_LENGTH | Returns the length of the content as sent by the client | | CONTENT_TYPE | Returns the data type of the content | | GATEWAY_INTERFACE | Returns the revision of the CGI specification used by the server | | HTTP_ | Returns the value stored in the header _HeaderName_ | | HTTP_ACCEPT | Returns the value of the Accept header | | HTTP_ACCEPT_LANGUAGE | Returns a string describing the language to use for displaying content | | HTTP_COOKIE | Returns the cookie string included with the request | | HTTP_REFERER | Returns a string containing the URL of the page that referred the request to the current page using an tag. If the page is redirected, HTTP_REFERER is empty | | HTTP_USER_AGENT | Returns a string describing the browser that sent the request | | HTTPS | Returns ON if the request came in through secure channel or OFF if the request came in through a non-secure channel | | HTTPS_KEYSIZE | Returns the number of bits in Secure Sockets Layer connection key size | | HTTPS_SECRETKEYSIZE | Returns the number of bits in server certificate private key | | HTTPS_SERVER_ISSUER | Returns the issuer field of the server certificate | | HTTPS_SERVER_SUBJECT | Returns the subject field of the server certificate | | INSTANCE_ID | The ID for the IIS instance in text format | | INSTANCE_META_PATH | The meta base path for the instance of IIS that responds to the request | | LOCAL_ADDR | Returns the server address on which the request came in | | LOGON_USER | Returns the Windows account that the user is logged into | | PATH_INFO | Returns extra path information as given by the client | | PATH_TRANSLATED | A translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping | | QUERY_STRING | Returns the query information stored in the string following the question mark (?) in the HTTP request | | REMOTE_ADDR | Returns the IP address of the remote host making the request | | REMOTE_HOST | Returns the name of the host making the request | | REMOTE_USER | Returns an unmapped user-name string sent in by the user | | REQUEST_METHOD | Returns the method used to make the request | | SCRIPT_NAME | Returns a virtual path to the script being executed | | SERVER_NAME | Returns the server's host name, DNS alias, or IP address as it would appear in self-referencing URLs | | SERVER_PORT | Returns the port number to which the request was sent | | SERVER_PORT_SECURE | Returns a string that contains 0 or 1. If the request is being handled on the secure port, it will be 1. Otherwise, it will be 0 | | SERVER_PROTOCOL | Returns the name and revision of the request information protocol | | SERVER_SOFTWARE | Returns the name and version of the server software that answers the request and runs the gateway | | URL | Returns the base portion of the URL | * * * ## Examples You can loop through all the server variables like this: <% for each x in Request.ServerVariables response.write(x & "
") next %> The following example demonstrates how to find out the visitor's browser type, IP address, etc.:

You are browsing this site with:

Your IP address is:

The DNS lookup of the IP address is:

The method used to call the page:

The server's domain name:

The server's port:

The server's software:

* * Complete Request Object Reference Manual](#)