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SMTP (Simple Mail Transfer Protocol)
P1: JsY JWBS001A-60.tex WL041/Bidgoli WL041-Bidgoli.cls May 12, 2005 3:27 Char Count= 0 SMTP (Simple Mail Transfer Protocol) Vladimir V. Riabov, Rivier College Introduction 1 SMTP Security Issues 12 SMTP Fundamentals 1 SMTP Vulnerabilities 12 SMTP Model and Protocol 2 SMTP Server Buffer Overflow Vulnerability 15 User Agent 4 Mail Relaying SMTP Vulnerability 15 Sending e-Mail 4 Mail Relaying SMTP Vulnerability in Microsoft Mail Header Format 4 Windows 2000 15 Receiving e-Mail 4 Encapsulated SMTP Address Vulnerability 15 The SMTP Destination Address 4 Malformed Request Denial of Service 16 Delayed Delivery 4 Extended Verb Request Handling Flaw 16 Aliases 5 Reverse DNS Response Buffer Overflow 16 Mail Transfer Agent 5 Firewall SMTP Filtering Vulnerability 16 SMTP Mail Transaction Flow 5 Spoofing 16 SMTP Commands 6 Bounce Attack 16 Mail Service Types 6 Restricting Access to an Outgoing Mail SMTP Service Extensions 8 Server 17 SMTP Responses 8 Mail Encryption 17 SMTP Server 8 Bastille Hardening System 17 On-Demand Mail Relay 8 POP and IMAP Vulnerabilities 17 Multipurpose Internet Mail Extensions Standards, Organizations, and (MIME) 8 Associations 18 MIME-Version 10 Internet Assigned Numbers Authority 18 Content-Type 10 Internet Engineering Task Force Working Content-Transfer-Encoding 10 Groups 18 Content-Id 11 Internet Mail Consortium 18 Content-Description 11 Mitre Corporation 18 Security Scheme for MIME 11 Conclusion 18 Mail Transmission Types 11 Glossary 18 Mail Access Modes 11 Cross References 19 Mail Access Protocols 11 References 19 POP3 11 Further Reading 22 IMAP4 12 INTRODUCTION and IMAP4), SMTP software, vulnerability and security issues, standards, associations, and organizations. -
Getting Started with Eudora 5.1 for Windows 95/98/ME/NT/2000 Author Teresa Sakata
WIN9X003 July 2003 Getting Started with Eudora 5.1 For Windows 95/98/ME/NT/2000 Author Teresa Sakata Introduction ..............................................................................................................................................................1 POP and IMAP Servers ............................................................................................................................................2 Requirements ............................................................................................................................................................2 Changes From Version 4.3.x ....................................................................................................................................3 Issues ........................................................................................................................................................................3 Where do I get Eudora? ............................................................................................................................................4 Getting Started..........................................................................................................................................................4 Installation ................................................................................................................................................................4 Configuring Eudora ..................................................................................................................................................5 -
Toward an Automated Vulnerability Comparison of Open Source IMAP Servers Chaos Golubitsky – Carnegie Mellon University
Toward an Automated Vulnerability Comparison of Open Source IMAP Servers Chaos Golubitsky – Carnegie Mellon University ABSTRACT The attack surface concept provides a means of discussing the susceptibility of software to as-yet-unknown attacks. A system’s attack surface encompasses the methods the system makes available to an attacker, and the system resources which can be used to further an attack. A measurement of the size of the attack surface could be used to compare the security of multiple systems which perform the same function. The Internet Message Access Protocol (IMAP) has been in existence for over a decade. Relative to HTTP or SMTP, IMAP is a niche protocol, but IMAP servers are widely deployed nonetheless. There are three popular open source UNIX IMAP servers – UW-IMAP, Cyrus, and Courier-IMAP – and there has not been a formal security comparison between them. In this paper, I use attack surfaces to compare the relative security risks posed by these three products. I undertake this evaluation in service of two complementary goals: to provide an honest examination of the security postures and risks of the three servers, and to advance the study of attack surfaces by performing an automated attack surface measurement using a methodology based on counting entry and exit points in the code. Introduction Contributions and Roadmap System administrators frequently confront the The paper makes two major contributions. First, problem of selecting a software package to perform a I undertake an in-depth discussion of the relative secu- desired function. Many considerations affect this deci- rity postures of the three major open source IMAP sion, including functionality, ease of installation, soft- servers in use today. -
GNU Guix Cookbook Tutorials and Examples for Using the GNU Guix Functional Package Manager
GNU Guix Cookbook Tutorials and examples for using the GNU Guix Functional Package Manager The GNU Guix Developers Copyright c 2019 Ricardo Wurmus Copyright c 2019 Efraim Flashner Copyright c 2019 Pierre Neidhardt Copyright c 2020 Oleg Pykhalov Copyright c 2020 Matthew Brooks Copyright c 2020 Marcin Karpezo Copyright c 2020 Brice Waegeneire Copyright c 2020 Andr´eBatista Copyright c 2020 Christine Lemmer-Webber Copyright c 2021 Joshua Branson Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled \GNU Free Documentation License". i Table of Contents GNU Guix Cookbook ::::::::::::::::::::::::::::::: 1 1 Scheme tutorials ::::::::::::::::::::::::::::::::: 2 1.1 A Scheme Crash Course :::::::::::::::::::::::::::::::::::::::: 2 2 Packaging :::::::::::::::::::::::::::::::::::::::: 5 2.1 Packaging Tutorial:::::::::::::::::::::::::::::::::::::::::::::: 5 2.1.1 A \Hello World" package :::::::::::::::::::::::::::::::::: 5 2.1.2 Setup:::::::::::::::::::::::::::::::::::::::::::::::::::::: 8 2.1.2.1 Local file ::::::::::::::::::::::::::::::::::::::::::::: 8 2.1.2.2 `GUIX_PACKAGE_PATH' ::::::::::::::::::::::::::::::::: 9 2.1.2.3 Guix channels ::::::::::::::::::::::::::::::::::::::: 10 2.1.2.4 Direct checkout hacking:::::::::::::::::::::::::::::: 10 2.1.3 Extended example :::::::::::::::::::::::::::::::::::::::: -
Proceedings Template
0 - IMAP in 90 Days or How to Migrate 25,000 Users to IMAP in Three Months Jay Graham Computing Services and Systems Development University of Pittsburgh 419 South Bellefield Avenue Pittsburgh, PA 15217 (412) 624-5244 [email protected] ABSTRACT Pittsburgh campus. Extensive use of user logs, forwarding data and distribution was critical to the process. The final phase The University of Pittsburgh began the Internet Message Access involved the migration of 25,000 users from VMS Mail, Unix Protocol (IMAP) Project in the spring of 1997 as an evaluation Pine and POP mail to the new environment by April 1, 2000. project investigating the replacement options for the legacy e-mail systems and a POP3 service. The project was initially divided into two phases---Phase 1 to deploy an IMAP server for campus- Keywords wide use and Phase 2 to identify and provide a reliable, high quality, enterprise-wide IMAP client. A sub-group of the IMAP IMAP, e-mail, POP, legacy, client-server project team was formed to identify requirements and evaluate clients. Cyrusoft International's Mulberry was found to meet the ever changing requirements of the campus computing labs and 1. INTRODUCTION have sufficient features and functionality that users would be compelled to switch from their legacy clients to the new Electronic mail has become a primary tool used by many large environment. organizations to enhance daily communication. E-mail between managers, workers, customers, students, teachers or parents often A critical third phase was added to the IMAP project which serves as a more efficient, cost effective and convenient form of required a phase-out of the legacy e-mail systems by April 1, 2000 interaction. -
Design and Management of Email Service
Design and Management of Email Service Source : homepage.ntu.edu.tw/~jsc/2005-mail.ppt Outline Introduction to the architecture and operation of SMTP Design of a suitable email system – Webmail solutions Postfix and simple configuration samples Spam and virus filtering Conclusion 2 Overview Electronic mail service has already evolved into one of the major Internet applications. It is not only fundamental, but also a must. Users may become impatient when mails were delayed, not to mention failed to access their emails. – Imagine we meet the situation of power failure or cut of water supply 3 Architecture of a Simple Mail System Consists of the following components – MTA - Mail transfer agent Sending and forwarding emails Server end – MDA - Mail delivery agent Delivering emails to recipients’ mailbox Server end – Pop3/Imap4 Daemons For users to download their mailboxs Server end – MUA - Mail user agent Reading and composing emails 4 Client end Architecture of a Simple Mail System Protocols Used for Mail System Protocols – For computer programs to communicate with each other – Similar to languages that human beings speak SMTP – Simple Mail Transfer Protocol – Too simple to provide any “advanced features” Authentication Authorization POP3 – Post Office Protocol version 3 – Simple IMAP4 – Internet Message Access Protocol version 4 – Fully compatible with internet message standards, e.g. MIME. – Allow messages to be accessed from more than one computer. – Provide support for online, offline, and disconnected modes. 6 – Multiple and share folders. Mail Forwarding Between Servers How to Find the Way to the Destination? How do we find the way to [email protected]? 8 DNS: The Key to All Internet Services Query DNS server by the address part of email address.([email protected]) 1. -
LIST of NOSQL DATABASES [Currently 150]
Your Ultimate Guide to the Non - Relational Universe! [the best selected nosql link Archive in the web] ...never miss a conceptual article again... News Feed covering all changes here! NoSQL DEFINITION: Next Generation Databases mostly addressing some of the points: being non-relational, distributed, open-source and horizontally scalable. The original intention has been modern web-scale databases. The movement began early 2009 and is growing rapidly. Often more characteristics apply such as: schema-free, easy replication support, simple API, eventually consistent / BASE (not ACID), a huge amount of data and more. So the misleading term "nosql" (the community now translates it mostly with "not only sql") should be seen as an alias to something like the definition above. [based on 7 sources, 14 constructive feedback emails (thanks!) and 1 disliking comment . Agree / Disagree? Tell me so! By the way: this is a strong definition and it is out there here since 2009!] LIST OF NOSQL DATABASES [currently 150] Core NoSQL Systems: [Mostly originated out of a Web 2.0 need] Wide Column Store / Column Families Hadoop / HBase API: Java / any writer, Protocol: any write call, Query Method: MapReduce Java / any exec, Replication: HDFS Replication, Written in: Java, Concurrency: ?, Misc: Links: 3 Books [1, 2, 3] Cassandra massively scalable, partitioned row store, masterless architecture, linear scale performance, no single points of failure, read/write support across multiple data centers & cloud availability zones. API / Query Method: CQL and Thrift, replication: peer-to-peer, written in: Java, Concurrency: tunable consistency, Misc: built-in data compression, MapReduce support, primary/secondary indexes, security features. -
Table of Contents
Table of Contents Preface .................................................................................................... xiii Part I: The Web Environment Chapter 1—Designing for a Variety of Browsers ...................... 3 Browsers ................................................................................................. 3 Design Strategies .................................................................................... 9 Writing Good HTML ............................................................................. 11 Knowing Your Audience ..................................................................... 12 Considering Your Site’s Purpose ......................................................... 13 Test! Test! Test! ..................................................................................... 13 Chapter 2—Designing for a Variety of Displays .................... 14 Dealing with Unknown Monitor Resolutions ..................................... 14 Fixed versus Flexible Web Page Design ............................................. 19 Accessibility .......................................................................................... 23 Alternative Displays .............................................................................. 26 Chapter 3—Web Design Principles for Print Designers ...................................................................... 28 Color on the Web ................................................................................. 28 Graphics on the Web .......................................................................... -
Designing a User Interface for the Innovative E-Mail Client Semester Thesis
Designing a User Interface for the Innovative E-mail Client Semester Thesis Student: Alexandra Burns Supervising Professor: Prof. Bertrand Meyer Supervising Assistants: Stephanie Balzer, Joseph N. Ruskiewicz December 2005 - April 2006 1 Abstract Email Clients have become a crucial application, both in business and for per- sonal use. The term information overload refers to the time consuming issue of keeping up with large amounts of incoming and stored email. Users face this problem on a daily basis and therefore benefit from an email client that allows them to efficiently search, display and store their email. The goal of this thesis is to build a graphical user interface for the innovative email client developed in a previous master thesis. It also explores the possibilities of designing a user interface outside of the business rules that apply for commercial solutions. 1 Contents 1 Introduction 4 2 Existing Work 6 2.1 ReMail ................................. 6 2.1.1 Methods ............................ 6 2.1.2 Problems Identified ...................... 7 2.1.3 Proposed Solutions ...................... 7 2.1.4 Assessment .......................... 8 2.2 Inner Circle .............................. 8 2.2.1 Methods ............................ 8 2.2.2 Problems Identified ...................... 9 2.2.3 Proposed Solutions ...................... 9 2.2.4 Assessment .......................... 10 2.3 TaskMaster .............................. 10 2.3.1 Methods ............................ 10 2.3.2 Problems Identified ...................... 11 2.3.3 Proposed Solution ...................... 11 2.3.4 Assessment .......................... 12 2.4 Email Overload ............................ 12 2.4.1 Methods ............................ 12 2.4.2 Problems Identified ...................... 13 2.4.3 Proposed Solutions ...................... 13 2.4.4 Assessment .......................... 14 3 Existing Solutions 16 3.1 Existing Email Clients ....................... -
Informational Internet Relay
Network Working Group C. Kalt Request for Comments: 2813 April 2000 Updates: 1459 Category: Informational Internet Relay Chat: Server Protocol Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2000). All Rights Reserved. Abstract While based on the client-server model, the IRC (Internet Relay Chat) protocol allows servers to connect to each other effectively forming a network. This document defines the protocol used by servers to talk to each other. It was originally a superset of the client protocol but has evolved differently. First formally documented in May 1993 as part of RFC 1459 [IRC], most of the changes brought since then can be found in this document as development was focused on making the protocol scale better. Better scalability has allowed existing world-wide networks to keep growing and reach sizes which defy the old specification. Kalt Informational [Page 1] RFC 2813 Internet Relay Chat: Server Protocol April 2000 Table of Contents 1. Introduction ............................................... 3 2. Global database ............................................ 3 2.1 Servers ................................................ 3 2.2 Clients ................................................ 4 2.2.1 Users ............................................. 4 2.2.2 Services .......................................... 4 2.3 Channels .............................................. -
Ubuntu Server Guide Ubuntu Server Guide Copyright © 2010 Canonical Ltd
Ubuntu Server Guide Ubuntu Server Guide Copyright © 2010 Canonical Ltd. and members of the Ubuntu Documentation Project3 Abstract Welcome to the Ubuntu Server Guide! It contains information on how to install and configure various server applications on your Ubuntu system to fit your needs. It is a step-by-step, task-oriented guide for configuring and customizing your system. Credits and License This document is maintained by the Ubuntu documentation team (https://wiki.ubuntu.com/DocumentationTeam). For a list of contributors, see the contributors page1 This document is made available under the Creative Commons ShareAlike 2.5 License (CC-BY-SA). You are free to modify, extend, and improve the Ubuntu documentation source code under the terms of this license. All derivative works must be released under this license. This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE AS DESCRIBED IN THE DISCLAIMER. A copy of the license is available here: Creative Commons ShareAlike License2. 3 https://launchpad.net/~ubuntu-core-doc 1 ../../libs/C/contributors.xml 2 /usr/share/ubuntu-docs/libs/C/ccbysa.xml Table of Contents 1. Introduction ........................................................................................................................... 1 1. Support .......................................................................................................................... 2 2. Installation ............................................................................................................................ -
Apache Geronimo Uncovered a View Through the Eyes of a Websphere Application Server Expert
Apache Geronimo uncovered A view through the eyes of a WebSphere Application Server expert Skill Level: Intermediate Adam Neat ([email protected]) Author Freelance 16 Aug 2005 Discover the Apache Geronimo application server through the eyes of someone who's used IBM WebSphere® Application Server for many years (along with other commercial J2EE application servers). This tutorial explores the ins and outs of Geronimo, comparing its features and capabilities to those of WebSphere Application Server, and provides insight into how to conceptually architect sharing an application between WebSphere Application Server and Geronimo. Section 1. Before you start This tutorial is for you if you: • Use WebSphere Application Server daily and are interested in understanding more about Geronimo. • Want to gain a comparative groundwork understanding of Geronimo and WebSphere Application Server. • Are considering sharing applications between WebSphere Application Server and Geronimo. • Simply want to learn and understand what other technologies are out there (which I often do). Prerequisites Apache Geronimo uncovered © Copyright IBM Corporation 1994, 2008. All rights reserved. Page 1 of 23 developerWorks® ibm.com/developerWorks To get the most out of this tutorial, you should have a basic familiarity with the IBM WebSphere Application Server product family. You should also posses a general understanding of J2EE terminology and technologies and how they apply to the WebSphere Application Server technology stack. System requirements If you'd like to implement the two technologies included in this tutorial, you'll need the following software and components: • IBM WebSphere Application Server. The version I'm using as a base comparison is IBM WebSphere Application Server, Version 6.0.