Re: Identifying whether 2 IPs are from the same server

[Terry Vernon <tvernon24 () comcast net>]

Try flooding one while watching the turnaround time on a ping to the 
other one. If it is the same machine, the flood might occupy the network 
stack and cause latency in the ping time from it's second IP. There are 
situations where this might give you a false positive such as two 
identical machines on an unswitched ethernet where the flood would 
naturally slow the response of the second machine. It's not a perfect 
plan but right off the top of my head that's an option. You can also use 
nmap to scan it and hope the machines reveal their uptimes, if the 
uptimes are identical then it could be the same machine or the admin 
gets off on synchronizing the power on his servers lol.

If you were more explicit about which sockets were in use then you can 
enumerate the two by looking at static files on the machines (web, anon 
ftp, etc). If you can find two identical folders on each IP through 
apache that doesn't have an index.html file you can compare the 
timestamps on the contents of both folders. There's a bunch of little 
things you can do.

I'm willing to bet 'nmap -O -p 0-1024 hostname' will tell you what you 
need to know

-Terry



BSK wrote:

> Hello,
>
> I am doing a Penetration Testing for 2 IP addresses.
> My findings till now for both the servers are exactly
> same. I strongly feel that both the IPs belong to the
> same machine. May be a scenario where two NICs are on
> the same machine with two Public IPs. I ran HPING to
> match their IP IDs but it shows different series for
> both of them.
>
> Is there any other technique that we can use to
> ascertain such a situation?
>
> thank you
>
>
>
>                 
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Audit your website security with Acunetix Web Vulnerability Scanner: 

Hackers are concentrating their efforts on attacking applications on your 
website. Up to 75% of cyber attacks are launched on shopping carts, forms, 
login pages, dynamic content etc. Firewalls, SSL and locked-down servers are 
futile against web application hacking. Check your website for vulnerabilities 
to SQL injection, Cross site scripting and other web attacks before hackers do! 
Download Trial at:

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