分多多！！

[ch81]

当客户端（浏览器，或自己的程序）连到web服务器时，
web服务器能从这个连接上得到什么信息
我的意思是，服务器通过什么来辨认某台主机的某次连接！
我只知道通过cookie,还有没有其他途径？
而且cookie里面那堆数据
服务器是根据那些原始数据产生的？

[希偌]

request.servervariables("remote_addr")
REMOTE_ADDR 访问者IP
HTTP_REFERER 连接来源
HTTP_USER_AGENT 浏览器类型
SERVER_SOFTWARE 服务器名称
<%
set oWSH=Server.CreateObject("WScript.Network")
response.write 机器名:"&oWSH.ComputerName
set oWSH=Nothing
response.write "<BR>"
response.write "IP地址:"&Request.ServerVariables("Local_Addr")
%>

[nirvana_hg]

可以得到你机器的IP地址，系统类型及浏览器资源。
还有可接受的返回文档格式。如text/html。连接方式：如keep alive
发送时间。等等
cookie记录的是你上次登录的一些信息。比如你登录一次该网站后，再次登录却发现你填写的资料都自动显示在原处，这就是cooie保留的内容。这样可以加强B/S的交互能力。

[ssm1226]

<%
for each key in request.serverVaribles
response.write request.serverVaribles(key)&"-----"
response.write key
response.write "<br>"
next
%>
能得到的全得到

[jamex]

ServerVariables
The ServerVariables collection retrieves the values of predetermined environment variables.

Syntax
Request.ServerVariables (server environment variable)

Parameters
server environment variable
Specifies the name of the server environment variable to retrieve. It can be one of the following values. Variable Description
ALL_HTTP All HTTP headers sent by the client.
ALL_RAW Retrieves all headers in the raw-form. The difference between ALL_RAW and ALL_HTTP is that ALL_HTTP places an HTTP_ prefix before the header name and the header-name is always capitalized. In ALL_RAW the header name and values appear as they are sent by the client.
APPL_MD_PATH Retrieves the metabase path for the (WAM) Application for the ISAPI DLL.
APPL_PHYSICAL_PATH Retrieves the physical path corresponding to the metabase path. IIS converts the APPL_MD_PATH to the physical (directory) path to return this value.
AUTH_PASSWORD The value entered in the client's authentication dialog. This variable is only available if Basic authentication is used.
AUTH_TYPE The authentication method that the server uses to validate users when they attempt to access a protected script.
AUTH_USER Raw authenticated user name.
CERT_COOKIE Unique ID for client certificate, Returned as a string. Can be used as a signature for the whole client certificate.
CERT_FLAGS bit0 is set to 1 if the client certificate is present.
bit1 is set to 1 if the Certifying Authority of the client certificate is invalid (not in the list of recognized CA on the server).

CERT_ISSUER Issuer field of the client certificate (O=MS, OU=IAS, CN=user name, C=USA).
CERT_KEYSIZE Number of bits in Secure Sockets Layer connection key size. For example, 128.
CERT_SECRETKEYSIZE Number of bits in server certificate private key. For example, e.g. 1024.
CERT_SERIALNUMBER Serial number field of the client certificate.
CERT_SERVER_ISSUER Issuer field of the server certificate.
CERT_SERVER_SUBJECT Subject field of the server certificate.
CERT_SUBJECT Subject field of the client certificate.
CONTENT_LENGTH The length of the content as given by the client.
CONTENT_TYPE The data type of the content. Used with queries that have attached information, such as the HTTP queries GET, POST, and PUT.
GATEWAY_INTERFACE The revision of the CGI specification used by the server. The format is CGI/revision.
HTTP_<HeaderName> The value stored in the header HeaderName. Any header other than those listed in this table must be prefixed by HTTP_ in order for the ServerVariables collection to retrieve its value.
Note The server interprets any underscore (_) characters in HeaderName as dashes in the actual header. For example if you specify HTTP_MY_HEADER, the server searches for a header sent as MY-HEADER.

HTTPS Returns ON if the request came in through secure channel (SSL) or it returns OFF if the request is for a non-secure channel.
HTTPS_KEYSIZE Number of bits in Secure Sockets Layer connection key size. For example, 128.
HTTPS_SECRETKEYSIZE Number of bits in server certificate private key. For example, 1024.
HTTPS_SERVER_ISSUER Issuer field of the server certificate.
HTTPS_SERVER_SUBJECT Subject field of the server certificate.
INSTANCE_ID The ID for the IIS instance in textual format. If the instance ID is 1, it appears as a string. You can use this variable to retrieve the ID of the Web-server instance (in the metabase) to which the request belongs.
INSTANCE_META_PATH The metabase path for the instance of IIS that responds to the request.
LOCAL_ADDR Returns the Server Address on which the request came in. This is important on multi-homed machines where there can be multiple IP addresses bound to a machine and you want to find out which address the request used.
LOGON_USER The Windows NT® account that the user is logged into.
PATH_INFO Extra path information as given by the client. You can access scripts by using their virtual path and the PATH_INFO server variable. If this information comes from a URL, it is decoded by the server before it is passed to the CGI script.
PATH_TRANSLATED A translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping.
QUERY_STRING Query information stored in the string following the question mark (?) in the HTTP request.
REMOTE_ADDR The IP address of the remote host making the request.
REMOTE_HOST The name of the host making the request. If the server does not have this information, it will set REMOTE_ADDR and leave this empty.
REMOTE_USER Unmapped user-name string sent in by the User. This is the name that is really sent by the user as opposed to the ones that are modified by any authentication filter installed on the server.
REQUEST_METHOD The method used to make the request. For HTTP, this is GET, HEAD, POST, and so on.
SCRIPT_NAME A virtual path to the script being executed. This is used for self-referencing URLs.
SERVER_NAME The server's host name, DNS alias, or IP address as it would appear in self-referencing URLs.
SERVER_PORT The port number to which the request was sent.
SERVER_PORT_SECURE A string that contains either 0 or 1. If the request is being handled on the secure port, then this will be 1. Otherwise, it will be 0.
SERVER_PROTOCOL The name and revision of the request information protocol. The format is protocol/revision.
SERVER_SOFTWARE The name and version of the server software that answers the request and runs the gateway. The format is name/version.
URL Gives the base portion of the URL.


Remarks
If a client sends a header other than those specified in the preceding table, you can retrieve the value of that header by prefixing the header name with HTTP_ in the call to Request.ServerVariables. For example, if the client sent this header

SomeNewHeader:SomeNewValue

you could retrieve SomeNewValue by using the following syntax

<% Request.ServerVariables("HTTP_SomeNewHeader") %>

You can use an iterator to loop through each server variable name. For example, the following script prints out all of the server variables in a table.

<TABLE>
<TR><TD><B>Server Variable</B></TD><TD><B>Value</B></TD></TR>
<% For Each name In Request.ServerVariables %>
<TR><TD> <%= name %> </TD><TD> <%= Request.ServerVariables(name) %> </TD></TR>
</TABLE>
<% Next %>

Example
The following example uses the Request object to display several server variables.

<HTML>
<!-- This example displays the content of several ServerVariables. -->
ALL_HTTP server variable =
<%= Request.ServerVariables("ALL_HTTP") %> <BR>
CONTENT_LENGTH server variable =
<%= Request.ServerVariables("CONTENT_LENGTH") %> <BR>
CONTENT_TYPE server variable =
<%= Request.ServerVariables("CONTENT_TYPE") %> <BR>
QUERY_STRING server variable =
<%= Request.ServerVariables("QUERY_STRING") %> <BR>
SERVER_SOFTWARE server variable =
<%= Request.ServerVariables("SERVER_SOFTWARE") %> <BR>
</HTML>

The next example uses the ServerVariables collection to insert the name of the server into a hyperlink.

<A HREF = "http://<%= Request.ServerVariables("SERVER_NAME") %>
/scripts/MyPage.asp">Link to MyPage.asp</A>

[cpplus]

其实某台主机的某次连接这样的问题还是你在服务器端来记录比较好

因为COOKIE是可以删除的

HTTP头其实也是可以指定的

还是将信息自己保存比较好