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Posts Tagged ‘ip address’

Analyzing a Forged Email Message: How to Tell It Was Forged?

Monday, February 9th, 2015

In our previous posting, we looked at exactly how Spammers and hackers can send forged email — how its is possible and how it is done.  Therein, we gave an example how one could send an email forged to be from Bank of America.

In this post, we will look at that forged Bank of America email to see technically what it looks like and how it differs from legitimate email from Bank of America.

What can we learn that allows us to detect forged email in the future?

The Forgery: Received.

The forged email from Bank of America was based on a legitimate email message, so that the forgery could look as close as possible to actual email from them.

In truth, the majority of forged email simply changes the “From” address and does not bother with anything else.  These forged messages are used for Spam and hope the forgery fools enough people to be worth it, through numbers.  What we are looking at here is a more carefully crafted message designed to fool filters and a careful eye.  These kinds of fakes might be used in spear phishing attacks on an individual or in more sophisticated Spam campaigns.

The the forged Bank of America email that arrived in the recipient’s mail box looked like this (the raw headers):

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Having Problems Sending Email Because Your ISP is Blacklisted?

Wednesday, October 9th, 2013

It happens over and over — users trying to send legitimate email messages are blocked from sending because the IP address that they are getting from their Internet Service Provider (ISP) for their personal computer (or small office) is on some major blacklist, like SpamHaus.  Comcast, for example, has been the focus of many of these issues. This message blocking often happens even if a user is sending outbound email through a legitimate email provider like LuxSci.

Users invariably ask:

  • Why is the mail blocked even though I am sending through LuxSci or some other email provider and not directly from my ISP?
  • What can I do about it?

Fortunately, there is a good reason why the blocks occur and an easy solution to them … anonymous SMTP service to hide your IP address.

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Restrict User WebMail Access by IP

Tuesday, February 9th, 2010

Block AccessAdministrators of LuxSci accounts now have the ability to specify exactly from what locations their users are permitted to login to WebMail.  I.e. administrators can choose to allow WebMail access only from the Office or certain other places.  This is good for general account and information security.

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IP Restrictions for Public WebAide Feed Security

Sunday, March 29th, 2009

LuxSci users with Blogs, Links, Notes and Documents WebAides can publish the information in these tools as a public RSS 2.0 feed.  Similarly, LuxSci users can publish their Calendars as a public iCal file.  These public files can be password protected.

However, it is often the case that when automating data transfer (i.e. having your Blog show up as a page in your internal Wiki) the programs that read the RSS and/or iCal feed might not support password protection. So, how can you ensure privacy and security without using password protection?

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