May 2005
Intermediate to advanced
666 pages
21h 5m
English
book
SSH, The Secure Shell: The Definitive Guide, 2nd Edition
by Daniel J. Barrett, Richard E. Silverman, Robert G. Byrnes
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Pine, IMAP, and SSH
Pine is a popular, Unix-based email program from the University of Washington (http://www.washington.edu/pine/). In addition to handling mail stored and delivered in local files, Pine also supports IMAP[146] for accessing remote mailboxes and SMTP[147] for posting mail.
In this case study, we integrate Pine and SSH to solve two common problems:
- IMAP authentication
In many cases, IMAP permits a password to be sent in the clear over the network. We discuss how to protect your password using SSH, but (surprisingly) not by port forwarding.
- Restricted mail relaying
Many ISPs permit their mail and news servers to be accessed only by their customers. In some circumstances, this restriction may prevent you from legitimately relaying mail through your ISP. Once again, SSH comes to the rescue.
We also discuss techniques to avoid Pine connection delays and facilitate access to multiple servers and mailboxes, including the use of a Pine-specific SSH connection script. This discussion will delve into more detail than the previous one on Pine/SSH integration. [4.5.3]
11.3.1 Securing IMAP Authentication
Like SSH, IMAP is a client/server protocol. Your email program (e.g., Pine) is the client, and an IMAP server process (e.g., imapd ) runs on a remote machine, the IMAP host, to control access to your remote mailbox. Also like SSH, IMAP generally requires you to authenticate before accessing your mailbox, typically by password. Unfortunately, in some cases this password is sent to the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.