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IP Address

how do i know if it is from same machine?

     

marie

9:22 pm on Feb 10, 2004 (gmt 0)

5+ Year Member



I have a list of IP addresses...from hotmail.....the first 4 numbers are the same.......and the rest are different. How do I know if the emails were sent from the same computer?

bakedjake

9:41 pm on Feb 10, 2004 (gmt 0)

WebmasterWorld Administrator bakedjake is a WebmasterWorld Top Contributor of All Time 10+ Year Member



No way to, really, especially if they were on a dynamic dial-up.

lukasz

11:11 pm on Feb 10, 2004 (gmt 0)

10+ Year Member



And even if there is only one IP you still cannot determine if it is the same computer. My ISP uses proxy server and all of my computers appear in log file as one IP.

User agent may help a bit in figuring it out.

jdMorgan

1:43 am on Feb 11, 2004 (gmt 0)

WebmasterWorld Senior Member jdmorgan is a WebmasterWorld Top Contributor of All Time 10+ Year Member



If a legal problem or criminal activity is at issue in this case, law enforcement can subpoena the ISP's records to narrow down the possible users of a given IP address at a given time. This info may be useless to you, but just in case...

Jim

chris_jt

7:50 am on Feb 11, 2004 (gmt 0)

10+ Year Member



The information isn't entirely useless. In the case of suspected criminal activity, you can also open a complaint with the FCC and US Secret Service. Visit their website for more information. In support of the moderator's reply, you can check with your local law enforcement and find out if they have a "computer crime" division. If so, they should be able to provide you with guidance on how to report suspected criminal activity. Taking such proactive measures can have an additional benefit of providing proof of your service's conduct should it come into question.
As another approach, there are components out there that can be used to perform dynamic reverse lookups on domains and IP's to check their validity. Specific components, however, are subject to the type of technology being used and also subject to your host provider's willingness to support them. Check with your hosting partner for more information.
In the case of emails, we use a component which checks the validity of the sender's domain. The component also checks the ability of the email address to receive emails to ensure the submitter is providing a valid email address. In addition, we also provide a publicly accessible "No Spam" policy.
 

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