Clam Antivirus 0.70 User Manual by Tomasz Kojm Contents 1
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Baruwa Documentation Release 1.1.2
Baruwa Documentation Release 1.1.2 Andrew Colin Kissa June 27, 2016 Contents 1 Introduction 3 2 Features 5 3 Screenshots 7 4 Requirements 9 4.1 Baruwa requirements.........................................9 4.2 MailScanner requirements......................................9 5 Source Installation 11 5.1 Install Baruwa............................................ 11 5.2 Configure RabbitMQ......................................... 12 5.3 Configure Baruwa.......................................... 12 5.4 Configure MailScanner........................................ 14 5.5 Testing................................................ 15 5.6 Need help............................................... 16 5.7 Distribution / OS installation..................................... 16 6 Baruwa on RHEL/SL/Centos 17 6.1 Install EPEL............................................. 17 6.2 Baruwa installation.......................................... 17 6.3 Configure RabbitMQ......................................... 17 6.4 Configure Baruwa.......................................... 18 6.5 Configure MailScanner........................................ 19 6.6 Testing................................................ 20 6.7 Need help............................................... 20 7 Baruwa on Fedora 21 7.1 Baruwa Installation.......................................... 21 7.2 Configure RabbitMQ......................................... 21 7.3 Configure Baruwa.......................................... 22 7.4 Configure MailScanner........................................ 23 7.5 Testing............................................... -
DEFINICIÓN Un Antivirus
ANTIVIRUS DEFINICIÓN Un antivirus es un programa de computadora cuyo propósito es combatir y erradicar los virus informáticos. Para que el antivirus sea productivo y efectivo hay que configurarlo cuidadosamente de tal forma que aprovechemos todas las cualidades que ellos poseen. Hay que saber cuales son sus fortalezas y debilidades y tenerlas en cuenta a la hora de enfrentar a los virus. Un antivirus es una solución para minimizar los riesgos y nunca será una solución definitiva, lo principal es mantenerlo actualizado. Para mantener el sistema estable y seguro el antivirus debe estar siempre actualizado, tomando siempre medidas preventivas y correctivas y estar constantemente leyendo sobre los virus y nuevas tecnologías. ¿CÓMO FUNCIONA? Básicamente, un antivirus compara el código de cada archivo con una base de datos de los códigos (también conocidos como firmas o vacunas) de los virus conocidos, por lo que es importante actualizarla periódicamente a fin de evitar que un virus nuevo no sea detectado. También se les ha agregado funciones avanzadas, como la búsqueda de comportamientos típicos de virus (técnica conocida como Heurística) o la verificación contra virus en redes de computadores. Normalmente un antivirus tiene un componente que se carga en memoria y permanece en ella para verificar todos los archivos abiertos, creados, modificados y ejecutados en tiempo real. Es muy común que tengan componentes que revisen los adjuntos de los correos electrónicos salientes y entrantes, así como los scripts y programas que pueden ejecutarse en un navegador web (ActiveX, Java, JavaScript). ALGUNOS ANTIVIRUS 1 CLAM ANTIVIRUS Comodo AntiVirus FProt Antivirus FSecure AntiVirus ZoneAlarm Antivirus ANTIVIRUS HEURISTICOS Los heurísticos analizan el código de cada archivo con métodos genéricos y detectan virus nuevos que todavía no se han incluido en la base de datos de virus del programa antivirus. -
Combatting Spam Using Mimedefang, Spamassassin and Perl
Combating Spam Using SpamAssassin, MIMEDefang and Perl Copyright 2003 David F. Skoll Roaring Penguin Software Inc. (Booth #23) Administrivia Please turn off or silence cell phones, pagers, Blackberry devices, etc... After the tutorial, please be sure to fill out an evaluation form and return it to the USENIX folks. 2 Overview After this tutorial, you will: Understand how central mail filtering works. Know how to use MIMEDefang to filter mail. Be able to integrate SpamAssassin into your mail filter. Know how to implement mail filtering policies with MIMEDefang and Perl. Know how to fight common spammer tactics. 3 Outline Introduction to Mail Filtering Sendmail's Milter API MIMEDefang Introduction, Architecture Writing MIMEDefang Filters SpamAssassin Integration Advanced Filter Writing Fighting Common Spammer Tactics Advanced Topics Policy Suggestions 4 Assumptions I assume that you: Are familiar with Sendmail configuration. You don't need to be a sendmail.cf guru, but should know the basics. Are familiar with Perl. Again, you don't need to be able to write an AI program in a Perl one- liner, but should be able to read simple Perl scripts. Are running the latest version of Sendmail 8.12 on a modern UNIX or UNIX-like system. 5 Why Filter Mail? The old reason: to stop viruses. The new reason: to stop spam and inappropriate content. Blocking viruses is easy. Block .exe and similar files, and test against signature databases. Blocking spam is hard, but becoming increasingly important. Organizations can even face lawsuits over inappropriate content. 6 Mail filtering is required for many reasons. In addition to the reasons given on the slide, you might need to filter outgoing mail as well to prevent virus propagation, dissemination of sensitive information, etc. -
Clam Antivirus: Open-Source Virus Protection
Clam Antivirus: Open-Source Virus protection Michaël Van Canneyt March 16, 2014 Abstract Protecting your precious PC against email and other viruses doesn’t have to cost a lot of money: Clam Antivrus is an open source virus scanner which can be installed on Unix machines (suitable for integration in mail server’s MTAs) but which also has a Windows version for those that are not fortunate enough have a Unix at hand. Introducing Clam Antivirus Clam Antivirus is an open-source implementation of a virus scanner which does 1 thing only: it scans a file for known viruses. The virus scanner consists of 2 parts: One is the actual scanner, clamscan: It scans a file to see whether it is infected with a known virus. It reports on the found viruses. The known viruses are kept in a database file. The second part (freshclam) serves to keep this database up-to-date: new viruses are born every day, and existing viruses mutate to more dangerous forms regularly, it is therefore of the utmost importance to keep the database with virus definitions up-to-date. The freshclam program should be run on a regular basis, for instance in a cron job on Unix. The Unix version features also a client/server model: The scanner runs as a daemon. The clamscan program then sends the file to be scanned to the daemon, for inpection. This reduces startup time and system load, which is quite important on servers than run a heavy- load MTA service. On Windows, a small GUI frontend exists which allows to perform and schedule scans, and to perform and schedule the virus database update. -
Linux Security Review 2015
Linux Security Review 2015 www.av-comparatives.org AV-Comparatives Linux Security Review Language: English May 2015 Last revision: 26 th May 2015 www.av-comparatives.org -1- Linux Security Review 2015 www.av-comparatives.org Contents Introduction ....................................................................................................................... 3 Reviewed products ............................................................................................................... 4 Malware for Linux systems ..................................................................................................... 5 Linux security advice ............................................................................................................ 6 Items covered in the review .................................................................................................. 7 Avast File Server Security ...................................................................................................... 8 AVG Free Edition for Linux.................................................................................................... 11 Bitdefender Antivirus Scanner for Unices ................................................................................ 13 Clam Antivirus for Linux ....................................................................................................... 17 Comodo Antivirus for Linux .................................................................................................. 20 Dr.Web Anti-virus for -
Macsysadmin 2009 Presentatio
Slide 1 SpamAssassin Way more than the Mac OS X Server GUI shows Presented by: Kevin A. McGrail Project Management Committee Member of the Apache Software Foundation SpamAssassin Project & President, PCCC September 16, 2009 Good Afternoon, My name is Kevin A. McGrail. If you read my biographyi for this conference, you’ll know already that I hate Spam and enjoy greatly fighting spammers. You’ll also know that I love all types of computers and use a wide variety of machines & operating systems. But I’m definitely old-school in my love for the command line interface. This doesn’t mean I don’t think that Apple’s OS X is the most beautiful pairing of a rock-solid CLI with a beautifully polished GUI. But it does mean that while we are here to talk about Mac system administration, the configuration of SpamAssassin is largely not server specific and most of the heavy- handed configuration changes will be done behind the scenes using the CLI. So let’s get started by talking about the definition of Spam. Page 1 of 67 Slide 2 What is Spam? •Spam is NOT about content, its about CONSENT. – Consent: to give assent or approval : agree <consent to being tested> Merriam‐Webster Dictionary •What is SPAM vs. spam? September 16, 2009 Chris Santerre gave the best definition of Spam I’ve ever seen. He based the definition of Spam on CONSENT not content because consent is when you give approval to someone to send you e-mails. Many people try and use various legal definitions such as CAN-SPAM in the US. -
Characterizing Antivirus Workload Execution
Characterizing Antivirus Workload Execution Derek Uluski, Micha Moffie and David Kaeli Computer Architecture Research Laboratory Northeastern University Boston, MA {duluski,mmoffie,kaeli}@ece.neu.edu Abstract head is introduced if we enable anti-virus scan- ning. Many users are unhappy with the per- Despite the pervasive use of anti-virus (AV) formance penalty they must pay for security. software, there has not been a systematic The amount of overhead introduced can be study of the characteristics of the execution of so significant that many users will defer virus this workload. In this paper we present a char- scanning or totally disable their anti-virus soft- acterization of four commonly used anti-virus ware. Then their system will be vulnerable to software packages. Using the Virtutech Simics viruses. Thus, it is important to address the toolset, we profile the behavior of four popu- performance overhead associated with anti- lar anti-virus packages as run on an Intel Pen- virus software execution. tiumIV platform running Microsoft Windows- Most anti-virus software packages employ a XP. range of scanning techniques to decide whether In our study, we focus on the overhead in- or not a given file is infected. More complex troduced by the anti-virus software during on- techniques also exist such as: sandboxing, dig- access execution. The overhead associated ital watermarking, and heuristic-based tech- with anti-virus execution can dominate overall niques [11]. performance. The AV-Test group has already There are two main usage models when run- reported that this overhead can range from 23- ning anti-virus software, 1) on-demand,and2) 129% on live systems running on-access exper- 1 on-access. -
Anti-Virus Outbreak Response Testing and Impact
Insecurity in Security Software Maik Morgenstern Andreas Marx AV-Test GmbH http://www.av-test.org Virus Bulletin 2005 Conference presentation about “Insecurity in Security Software” Copyright © 2005 AV-Test GmbH, Klewitzstr. 6, D-39112 Magdeburg, Germany Phone: +49 391 6075460, Fax: +49 391 6075469, http://www.av-test.org Table of content z The paradox z Types of security software z Comparison of CVE advisories z Examples of bugs and security vulnerabilities z Why bugs occur z Vulnerability lifecycle z What to do? (for users and developers) z Trustworthy computing security development lifecycle The paradox z All software products contain security vulnerabilities (and other bugs) z AV software is widely deployed to protect companies, organizations and home users z Every week, security flaws are discovered in different AV products z The paradox: Security software is meant to secure the system, but nowadays it introduces new security holes. Types of security software z Two different groups of security software: – Home and business user software (widely used) z Firewalls z IPSec products z IDS/IPS z AV software… – Tools used by researchers (small deployment) z IDA Pro z OllyDbg z Softice… CVE advisories for vendor products (2001 quarterly average = 100, Source: © The Yankee Group) z Microsoft / Security vendors / All vendors Bugs leading to security vulnerabilities z A couple of examples from recent months (advisory titles): – ISS and the Witty Worm – Trend Micro VSAPI ARJ parsing – McAfee Virus Library – Symantec Multiple Products UPX Parsing Engine Heap Overflow – Computer Associates Vet Antivirus Library Remote Heap Overflow – Kaspersky AntiVirus "klif.sys" Privilege Escalation Vulnerability – OllyDbg "INT3 AT" Format String Vulnerability – DataRescue IDA Pro Dynamic Link Library Format String Vulnerability – Clam AntiVirus ClamAV Cabinet File Handling DoS Vulnerability Bugs vs. -
Clam Antivirus 0.100.2 User Manual Contents 1
Clam AntiVirus 0.100.2 User Manual Contents 1 Contents ClamAV User Manual, 87d 88d 89d c 2018 Cisco Systems, Inc. Authors: Tomasz Kojm This document is distributed under the terms of the GNU General Public License v2. Clam AntiVirus is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ClamAV and Clam AntiVirus are trademarks of Cisco Systems, Inc. 1 Introduction 2 1 Introduction Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed espe- cially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library. 1.1 Features • Licensed under the GNU General Public License, Version 2 • POSIX compliant, portable • Fast scanning • Supports on-access scanning (Linux only) • Detects over 1 million viruses, -
Canit-PRO User's Guide
CanIt-PRO User’s Guide for Version 10.2.5 AppRiver, LLC 13 September 2018 2 CanIt-PRO — AppRiver, LLC Contents 1 Introduction 13 1.1 Organization of this Manual.............................. 13 1.2 Definitions........................................ 14 2 The Simplified Interface 19 3 The My Filter Page 21 3.1 Sender Rules...................................... 21 3.2 The Quarantine..................................... 22 3.3 Online Documentation................................. 22 4 The CanIt-PRO Quarantine 23 4.1 Viewing the Quarantine................................. 23 4.1.1 Message Summary Display........................... 23 4.1.2 Sort Order.................................... 24 4.1.3 Message Body Display............................. 25 4.1.4 Summary of Links............................... 25 4.2 Message Disposition.................................. 25 4.2.1 Quick Spam Disposal.............................. 26 4.3 Reporting Phishing URLs................................ 27 4.4 Viewing Incident Details................................ 27 4.4.1 Basic Details.................................. 28 4.4.2 Address Information.............................. 29 4.4.3 History..................................... 29 4.4.4 Spam Analysis Report............................. 29 4.5 Viewing Other Messages................................ 30 4.6 Viewing Specific Incidents............................... 30 CanIt-PRO — AppRiver, LLC 3 4 CONTENTS 4.7 Searching the Quarantine................................ 30 4.8 Closed Incidents.................................... -
An Innovative Custom Cyber Security Solution for Protecting Enterprises and Corporates’ Assets
An Innovative Custom Cyber Security Solution for Protecting Enterprises and Corporates’ Assets Karim Ouazzane*, Markson Aigbodi, Daniel Mitchell, Vassil Vassilev School of Computing, London Metropolitan University E-mail: [email protected], [email protected], [email protected], [email protected] Jun Li Department of Oncology, University of Oxford E-mail: [email protected] Abstract Anti-virus software has been the main defense against malicious application and will remain so in the future. However the strength of an anti-virus product will depend on having an updated virus signature and the heuristic engine to detect future and unknown virus. The time gap between an exploit appearing on the internet and the user receiving an update for their anti-virus signature database on their machine is very crucial. Having a diverse multi-Engine anti-virus scanner in the infrastructure with the capability for custom signature definition as part of a defence in-depth strategy will help to close that gap. This paper presents a technique of deploying more than one anti-virus solution at different layers and using custom anti-virus signature which is deployed in a custom proxy solution as part of a defence in-depth strategy. Keywords: Anti-virus, ClamAV, Malware, defence in-depth, Portable Executable (PE), Cyber security. Introduction Malicious applications like virus, worm, Trojan, Spamming and phishing tools can infect and destroy information in a user’s computer through means that the user utilizes in communicating on the internet. Email, File attachment, web surfing or file transfer on the internet either with a desktop or a smart phone are just a few of the many ways that potential harmful applications called Malware (Norton, 2012) can be introduced into the network. -
Canit-Domain-PRO Administration Guide for Version 10.2.9 Appriver, LLC 11 December 2020 2
CanIt-Domain-PRO Administration Guide for Version 10.2.9 AppRiver, LLC 11 December 2020 2 CanIt-Domain-PRO — AppRiver, LLC Contents 1 Introduction 19 1.1 Principles of Operation................................. 19 1.2 Handling False-Positives................................ 19 1.2.1 Spam-Control Delegation........................... 20 1.3 Organization of this Manual.............................. 20 1.4 Definitions........................................ 21 2 Operation 27 2.1 Principles of Operation................................. 27 2.2 Interaction between Allow Rules and Block Rules................... 28 2.2.1 RCPT TO: Actions............................... 28 2.2.2 Post-DATA Actions............................... 30 2.3 Streaming........................................ 32 2.4 How Addresses are Streamed.............................. 32 2.5 How Streaming Methods are Chosen.......................... 33 2.6 Status of Messages................................... 35 2.6.1 Secondary MX Relays............................. 36 2.7 The Database...................................... 36 2.8 Remailing Messages.................................. 37 3 Realms 39 3.1 Introduction to Realms................................. 39 3.2 Realm Names...................................... 40 3.2.1 The base Realm................................ 40 3.3 Creating Realms..................................... 40 3.4 Realm Mappings.................................... 41 3.5 Determining the Realm................................. 42 CanIt-Domain-PRO — AppRiver, LLC 3 4 CONTENTS