Christopher Schultz wrote:

Yes, most TCP/IP stacks use 127.0.0.1 as a special-case that avoids most
of the real stack and instead uses a kernel buffer as the data transfer
mechanism.

I just tried to benchmark my own system localhost versus a DNS name that
resolves to an IP address handled on the same machine. The results of
downloading a 32MiB file 100 times using each address were the same. So,
either my previous statement is invalid or my Linux kernel is smart
enough to know that the same type of "localhost" optimization can be
performed when the destination IP is on the local machine.

Well, at least it's a security thing then.  Even if the firewall
somehow got opened up, Tomcat is still only accessible from
outside the box by going through httpd first.


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