http://www.w3schools.com/asp/coll_servervariables.asp The ServerVariables collection is used to retrieve the server variable values. Request.ServerVariables(server_variable) <% Response.Write(Request.ServerVariables("remote_addr")) %> You can loop through all of the server variables like this: VBSCRIPT <% for each x in Request.ServerVariables response.write(x & "<br />") next %> JSCRIPT <% for(var e=new Enumerator(Request.ServerVariables);!e.atEnd();e.moveNext()) { Response.write(e.item()+'<br />') } %> -------------------------------------------------------------------------------- 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_<HeaderName> 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 <a> 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 -------------------------------------------------------------------------------- This example demonstrates how to find out the visitor's browser type, IP address, and more: <html> <body> <p> <b>You are browsing this site with:</b> <%Response.Write(Request.ServerVariables("http_user_agent"))%> </p> <p> <b>Your IP address is:</b> <%Response.Write(Request.ServerVariables("remote_addr"))%> </p> <p> <b>The DNS lookup of the IP address is:</b> <%Response.Write(Request.ServerVariables("remote_host"))%> </p> <p> <b>The method used to call the page:</b> <%Response.Write(Request.ServerVariables("request_method"))%> </p> <p> <b>The server's domain name:</b> <%Response.Write(Request.ServerVariables("server_name"))%> </p> <p> <b>The server's port:</b> <%Response.Write(Request.ServerVariables("server_port"))%> </p> <p> <b>The server's software:</b> <%Response.Write(Request.ServerVariables("server_software"))%> </p> </body> </html>