Web Penetration Testing with Kali Linux - Third Edition
by Daniel W. Dieterle, Gilberto Najera-Gutierrez, Juned Ahmed Ansari
Identifying virtual hosts
The websites of many organizations are hosted by service providers using shared resources. The sharing of IP addresses is one of the most useful and cost-effective techniques used by them. You will often see a number of domain names returned when you do a reverse DNS query for a specific IP address. These websites use name-based virtual hosting, and they are uniquely identified and differentiated from other websites hosted on the same IP address by the host header value.
This works similar to a multiplexing system. When the server receives the request, it identifies and routes the request to the specific host by consulting the Host field in the request header. This was discussed in Chapter 1, Introduction to Penetration ...
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