Tài liệu hướng dẫn cấu hình exchange server mail phần forefont, giao tiếp trực tiếp với hệ thống bên ngoài, là máy chủ trung chuyển email giữa bên trong và ngoài hệ thống. ForeFront là một phần mềm anti-virus của Microsoft. ForeFront có nhiều phiên bản: ForeFront Client để cài cho end-user, ForeFront For SharePoint .... Bài viết sẽ giới thiệu với bạn ForeFront for Exchange. Đây là hệ thống anti-virus tích hợp vớp Exchange Server....
Muc tiêu bài lab:
Thiết lập https cho web mail Thiếp lập mã hóa mail giữa các user trong hệ thống
Các bước thực hiện:
- Cài đặt dịch vụ Active directory certificate service - Xin certificate cho web mail - Kiểm tra web mail đi bằng giao thức https - Xin certificate cho user - Gửi mail kèm chữ ký số và mã hóa
One of the lessons I learned early in life is to never confess the stupid
things that I have done in public—unless there’s a good punch line at
the end of the story. Well, there is really no punch line at the end of the
story I am about to tell you, but I am going to tell it anyway, because it
helps introduce some of the key issues and concepts involved when
securing e-mail clients and servers.
Several other mail transfer agents are available to replace sendmail. Two popular aternatives are Qmail
(www.qmail.org) by David Bernstein, and Postfix (www.postfix.org) by Wietse Venema. Both of these MTAs
were designed and written from the ground up with security and performance in mind. It is beyond the scope
of this guide to give details on installing and configuring either of these alternatives, but a wealth of information
is available on the Internet.
Even as recently as five years ago, many computer industry experts would never have guessed how pervasive and “business critical” electronic messaging would eventually become. The degree to which some information technology professionals are surprised by the pervasive nature of today’s electronic mails systems is merely amusing to those of us that have had an e-mail address for more than 20 years.
Developing Secure Applications with Visual Basic first provides you with an understanding of encryption, and then guides you through adding security features to your own applications using the Microsoft CryptoAPI, and the new security features of Windows 2000. Developers who have been confused by the high-end, academic style of other encryption books and cryptography theory will delight with Chapman's understandable style and hands-on methods.
Electronic Mail Security: PGP, S/MIME
Pretty Good Privacy (PGP) được phát minh bởi Philip Zimmermann đã phát hành phiên bản 1.0 vào năm 1991. Sau đó phiên bản 2.6.x và 5.x (hoặc 3.0) của PGP đã được thực hiện bởi một sự hợp tác tất cả các tình nguyện theo hướng dẫn thiết kế của Zimmermann. PGP là sử dụng rộng rãi trong các phiên bản cá nhân và thương mại chạy trên nhiều nền tảng trong cộng đồng máy tính.
As I wrote this introduction, word of an e-mail virus was breaking in the news. As I sat to edit it, yet another virus had been found and was being fought. These viruses can take down major e-mail systems, disrupt communications, and destroy data. Worst of all, the viruses spread fast and easily through our networks, yet this is nothing new. Several e-mail viruses have surfaced prior to these, and many more are sure to follow. So how can they still be a threat? Why hasn't someone done something to stop them? The main reason is easy to see: most...
Open source software is such an integral part of the Internet that is it safe to say that the
Internet wouldn’t exist as we know it today without it. The Internet never would have
grown as fast and as dynamically as it did without open source programs such as BIND,
which controls the domain name system; Sendmail, which powers most e-mail servers;
INN, which runs many news servers; Major Domo, which runs many of the thousands of
mailing lists on the Internet; and of course the popular Apache Web server. One thing for
sure is that the Internet is a lot cheaper due to open source...
WHY SECURITY As computers becoming a part of our daily routine, we end up in leaving some of our sensitive information on our PC’s. These starts from Password’s, E-Mail Id’s, Credit card numbers, online banking details etc. Then there is another risk called viruses and spyware when you are online. There is only one fundamental difference between a virus and spyware, viruses are written for destruction and spywares for gain. When we speak about computer security what it means is that, how we can prevent intruders from entering our systems.
Privacy Enhanced Mail (PEM) was the ﬁrst serious eﬀort to secure Internet
mail. The Internet Resources Task Force (IRTF) Privacy and Security Research
Group (PSRG) did the initial design. The Internet Engineering Task Force (IETF)
PEM Working Group continued development for three years, resulting in a four-
part Proposed Internet Standard published in early 1993    . PEM
is a broad standard suite, it provides encryption, authentication, message integrity
and key management. PEM supports both symmetric and asymmetric (public-
key) key management schemes.
Every day I read e-mails and articles dealing with computer security attacks and breaches, and the
repercussions that follow. I have been getting onboard with computer security for decades, and there is
no end in sight for this effort. Each and every professional in information technology has a commitment
to keep with regard to computer security. We have, most of us, signed computing codes of conduct, and
further we have aligned ourselves with those who protect the computing resources of our respective
What do we mean by an insecure medium? Well, in some dictionary or another, under the
definition of “insecure medium” should be a picture of the Internet. The world is evolving towards
interconnecting every computer, and people talk about connecting household appliances as well, all
into some wonderful global internetwork. How wonderful! You’d be able to send electronic mail to
anyone in the world. You’d also be able to control your nuclear power plant with simple commands
sent across the network while you were vacationing in Fiji. Or sunny Libya. Or historic Iraq.
Biggest problem is figuring out who a piece of mail is really from
Must use a higher level mechanism for trust or privacy
Most SMTP clients use sendmail which has been a constant source of security problems for years
Lecture Security + Guide to Network Security Fundamentals - Chapter 6 include objectives: Protect e-mail systems, list World Wide Web vulnerabilities, secure Web communications, secure instant messaging.