An IP which resolve into several remote_hosts...

... trough the gethostbyaddr() function.

[Marino]

Hello,

Using the gethostbyaddr() function several times on the same IP, I've seen that it resolves in any of the sites that are hosted on the server. Peculiar...

I'd have thought that a gethostbyaddr() would have returned the name of the server -which I need. Is it some faking the admin has set, or what?

[ergophobe]

Returns the host name of the Internet host specified by ip_address or a string containing the unmodified ip_address on failure

All you can get is the host name, not the server name, from a DNS lookup, which is what you're doing AFAIK.

[Marino]

Sorry, I was a little tired. I did mean hte host name, not the server name.

However, I still wonder how an IP can resolve into several host names.

Example : 216.113.2.*** will resolve into
lcmmtlcnai03-139.as.***.**
lcmmtlcnai03-139.***.**

Another : 217.238.91.*** will resolve into
pD9EE5***.dip.t-dialin.net
pD9EE5**.dip0.t-ipconnect.de

A last one : 61.16.218.*** will resolve into
hotwire-83-218-***-ind.hotwireindia.com
ptil-83-218-***-ind.primus-india.net

-mod : feel free to replace more letter by "*" if needed.

[killroy]

It's called multi-homing.

SN

[KingMacro]

if you use some tool to look at the results of the DNS lookup on the hostname you'll find that there are multiple records for it - it effectively resolves to multiple IP Addresses, its a very basic form of load ballancing used by many sites

for example...

[dnsstuff.com...]

[Marino]

Ok... Thanks a lot.