How to get IP address of the visitor browser in ASP
<%= Request.ServerVariables("REMOTE_ADDR")%>Request.ServerVariables("REMOTE_ADDR") returns the network address visible to IIS for the current connection.
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Behind a reverse proxy, CDN or load balancer, this may be the proxy address rather than the visitor's original address. Forwarded-IP headers should only be trusted when they are set and sanitized by infrastructure you control. An IP address is also not a reliable proof of a person's identity or precise location.
In PHP we can find out the IP address and details are here.
In ASP as we will use the http header information so it is better to read the full article on http header and request object here.
We will use http header name REMOTE_ADDR or REMOTE_HOST to get the IP address. Here is the code.
<%= Request.ServerVariables("REMOTE_ADDR")%>Referrer Cookies
Read the peer IP address
Response.Write Server.HTMLEncode( _
Request.ServerVariables("REMOTE_ADDR"))The result varies by visitor and network infrastructure; it may be a proxy IP address.
Proxies change what REMOTE_ADDR means
REMOTE_ADDR identifies the network peer reaching IIS, which can be a reverse proxy rather than the visitor. Only use trusted forwarding headers when your proxy configuration verifies them.
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Subhendu Mohapatra
Author & Instructor at plus2net
I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.
