Red Hat Enterprise Linux 8 Securing Networks
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SNMP Trap - Firewall Rules
SNMP Trap - Firewall Rules Article Number: 87 | Rating: 1/5 from 1 votes | Last Updated: Wed, Jan 13, 2021 at 4:42 PM Fir e wall Rule s These steps explain how to check if the Operating System (OS) of the Nagios server has firewall rules enabled to allow inbound SNMP Trap UDP port 162 traffic. The different supported OS's have different firewall commands which are explained as follows. You will need to establish an SSH session to the Nagios server that is receiving SNMP Traps. RHEL 7/8 | C e nt O S 7/8 | O r ac le Linux 7/8 First check the status of the firewall: systemctl status firewalld.service IF the firewall is running , it should product output like: ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled) Active: active (running) since Tue 2018-11-20 10:05:15 AEDT; 1 weeks 0 days ago Docs: man:firewalld(1) Main PID: 647 (firewalld) CGroup: /system.slice/firewalld.service └─647 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid IF the firewall is NO T running, it will produce this output: ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled) Active: inactive (dead) since Tue 2018-11-27 14:11:34 AEDT; 965ms ago Docs: man:firewalld(1) Main PID: 647 (code=exited, status=0/SUCCESS) If the firewall is NOT running, this means that inbound traffic is allowed. To ENABLE the firewall on b o o t and to s ta rt it, execute the following commands: systemctl -
Kommentarer Till Utgåvan Debian 10 (Buster), 64-Bit PC
Kommentarer till utgåvan Debian 11 (bullseye), 64-bit PC The Debian Documentation Project (https://www.debian.org/doc/) 5 oktober 2021 Kommentarer till utgåvan Debian 11 (bullseye), 64-bit PC Detta dokument är fri mjukvara; du kan vidaredistribuera det och/eller modifiera det i enlighet med villkoren i Free Software Foundations GNU General Public License version 2. Detta program är distribuerat med förhoppning att det ska vara användbart men HELT UTAN GARAN- TIER; inte ens underförstådd garanti om SÄLJBARHET eller att PASSA ETT SÄRSKILT SYFTE. Läs mer i GNU General Public License för djupare detaljer. Du borde ha fått en kopia av GNU General Public License tillsammans med det här programmet; om inte, skriv till Free Software Foundation, Inc., 51 Franklin Street. Fifth Floor, Boston, MA, 02110-1301 USA. Licenstexten kan också hämtas på https://www.gnu.org/licenses/gpl-2.0.html och /usr/ share/common-licenses/GPL-2 på Debian-system. ii Innehåll 1 Introduktion 1 1.1 Rapportera fel i det här dokumentet . 1 1.2 Bidra med uppgraderingsrapporter . 1 1.3 Källor för det här dokumentet . 2 2 Vad är nytt i Debian 11 3 2.1 Arkitekturer med stöd . 3 2.2 Vad är nytt i distributionen? . 3 2.2.1 Skrivbordsmiljöer och kända paket . 3 2.2.2 Utskrifter och scanning utan drivrutiner . 4 2.2.2.1 CUPS och utskrifter utan drivrutiner . 4 2.2.2.2 SANE och scannrar utan drivrutiner . 4 2.2.3 Nytt generellt kommando ”open” . 5 2.2.4 Control groups v2 . 5 2.2.5 Beständig systemd-journal . -
Firewalld ↔ Iptables (Continued)
firewalld ↔ iptables (continued) Or, better said as, Understanding Linux Firewall Changes and Tools A firewall evolution and system management process Presented to SLUUG By David Forrest August 9, 2017 Bio I am David Forrest, a businessman in the housing and construction materials industry. Always keen to use the open and supportable solution even if it means getting my hands dirty. I was there, I did that, I have the t-shirt. And, I'm retired so now I can work on the “bleeding edge” - so on to the testing kernel! Why tonight? Why should we switch to firewalld? I felt a continuation was in order to address the problems that are caused by the virtual world and the interaction of processes within today's machines. Our various distributions seem to be jumping to the systemd init setup as it appears to offer better administration control to Linux Kernel machines. Firewalld just one of many efforts to see the future. In recent years, operating system virtualization has taken the industry by storm. But I'm still on CentOS7 and it uses firewalld as its default firewall along with systemd https://wiki.debian.org/Debate/initsystem/systemd firewalld It's a daemon and a command line interface to all the backends! One can start it as a service with a default setup and change it dynamically with a command line or with the daemon using D-Bus or NetworkManager. And with the new nftables release, we'll be able to combine several rules in one rich rule. The firewalld Architecture Firewalld and nft Systems have also moved toward Software Defined Networking (SDN) and system density has increased. -
Computer Security Administration
Information Security Group Information + Technology Services University of Toronto Endpoint Security Policy System A Network Access Control System with Vulnerability Detection and User Remediation Evgueni Martynov UNIX Systems Group Mike Wiseman Computer Security Administration Endpoint Security Policy System Table of Contents Acknowledgements............................................................................. 3 Change History .................................................................................... 4 Summary ............................................................................................. 5 Overview .............................................................................................. 5 Network Isolation ............................................................................... 6 Vulnerability Detection ....................................................................... 6 User Remediation ................................................................................ 8 Administering ESP ............................................................................... 8 ESP Operations Experience ................................................................ 9 Appendix I – Installation and Configuration of ESP server ........... 10 Using init.sh ..................................................................................... 10 Post-Installation ................................................................................ 11 Configuring an ESP Server to Work with an ESP Agent ....................... -
Hostscan 4.8.01064 Antimalware and Firewall Support Charts
HostScan 4.8.01064 Antimalware and Firewall Support Charts 10/1/19 © 2019 Cisco and/or its affiliates. All rights reserved. This document is Cisco public. Page 1 of 76 Contents HostScan Version 4.8.01064 Antimalware and Firewall Support Charts ............................................................................... 3 Antimalware and Firewall Attributes Supported by HostScan .................................................................................................. 3 OPSWAT Version Information ................................................................................................................................................. 5 Cisco AnyConnect HostScan Antimalware Compliance Module v4.3.890.0 for Windows .................................................. 5 Cisco AnyConnect HostScan Firewall Compliance Module v4.3.890.0 for Windows ........................................................ 44 Cisco AnyConnect HostScan Antimalware Compliance Module v4.3.824.0 for macos .................................................... 65 Cisco AnyConnect HostScan Firewall Compliance Module v4.3.824.0 for macOS ........................................................... 71 Cisco AnyConnect HostScan Antimalware Compliance Module v4.3.730.0 for Linux ...................................................... 73 Cisco AnyConnect HostScan Firewall Compliance Module v4.3.730.0 for Linux .............................................................. 76 ©201 9 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. -
Release Notes for Debian 10 (Buster), 32-Bit PC
Release Notes for Debian 10 (buster), 32-bit PC The Debian Documentation Project (https://www.debian.org/doc/) September 28, 2021 Release Notes for Debian 10 (buster), 32-bit PC This document is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2, as published by the Free Software Foundation. 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. The license text can also be found at https://www.gnu.org/licenses/gpl-2.0.html and /usr/ share/common-licenses/GPL-2 on Debian systems. ii Contents 1 Introduction 1 1.1 Reporting bugs on this document . 1 1.2 Contributing upgrade reports . 1 1.3 Sources for this document . 2 2 What’s new in Debian 10 3 2.1 Supported architectures . 3 2.2 What’s new in the distribution? . 3 2.2.1 UEFI Secure Boot . 4 2.2.2 AppArmor enabled per default . 4 2.2.3 Optional hardening of APT . 5 2.2.4 Unattended-upgrades for stable point releases . 5 2.2.5 Substantially improved man pages for German speaking users . 5 2.2.6 Network filtering based on nftables framework by default . -
Red Hat Enterprise Linux 7 Firewalld Howto
Red Hat Enterprise Linux 7 Firewalld HowTo Patrick Ladd Technical Account Manager, Red Hat [email protected] What Is firewalld? • Dynamic, modern control of system firewall functions • Still iptables underneath • Major features; – Real time rule changes without interruption – Zones to simplify and segregate configuration – Separate network traffic & rules by interface and zone – GUI that works – System configs in /usr/lib/firewalld/* – Custom configs in /etc/firewalld/* – Daemon runs in user space – Protocol independent: IPv4 & IPv6 Zones ● Manages groups of rules ● Dictate what traffic should be allowed – Based on level of trust in connected network(s) – Based on origin of packet ● Network interfaces are assigned a zone Default Pre-Defined Zones ● drop Drop all incoming traffic unless related to outgoing traffic (do not even respond with ICMP errors). ● block Reject all incoming traffic unless related to outgoing traffic. ● dmz Reject incoming traffic unless related to outgoing traffic or matching the ssh pre-defined service. ● external Reject incoming traffic unless related to outgoing traffic or matching the ssh pre-defined service. Outgoing IPv4 traffic forwarded through this zone is masqueraded to look like it originated from the IPv4 address of the outgoing network interface. Default Pre-Defined Zones ● public Reject incoming traffic unless related to outgoing traffic or matching the ssh, or dhcpv6-client pre-defined services. The default zone for newly-added network interfaces. ● work Reject incoming traffic unless related to outgoing traffic or matching the ssh, ipp-client, ordhcpv6-client pre- defined services. Default Pre-Defined Zones ● internal Reject incoming traffic unless related to outgoing traffic or matching the ssh, mdns, ipp-client, samba-client, or dhcpv6-client pre-defined services. -
Digital Safety & Security Lt Cdr Mike Rose RN ©
RNIOA Article 15 [17/05/2020] characteristics linked to their IP address to enable ‘tracking.’ Where internet-based criminality is Digital Safety & Security involved, the acquisition of banking and credit card Lt Cdr Mike Rose RN © data is often the main objective. Introduction The aim of this article is to help people understand Prior to the introduction of the internet, personal the risks they face and how to attempt to mitigate computers for home use were self-contained in that them. So, whether you’re accessing the internet the operating system was bought and installed by with your mobile phone, PC, tablet or laptop, you’re the supplier/user, and external communications potentially exposed to every hacker, digital thief and using the PC were not yet technically developed. spammer across the globe. Not to mention that The most likely risk therefore was the possibility of viruses, trojan horses, spyware and adware are someone switching on unattended, non-password- always just one click away. You wouldn’t drive protected computers and copying sensitive without insurance, a seat belt and a GPS device, information onto an external memory device. so, similarly, when you “surf the net”, you need to Essentially, users were in control of their computing make sure that you are well “buckled up” and well- equipment and paid real money for the services informed. This article is written as a guide to “safe and software they used to a known vendor. surfing” and is just as important for personal users as it is for large tech companies. Malicious websites Spyware, which is software that steals your sensitive data without consent, lurks in many corners of the internet; often in places where you'd least expect it. -
Red Hat Virtualization 4.4 Package Manifest
Red Hat Virtualization 4.4 Package Manifest Package listing for Red Hat Virtualization 4.4 Last Updated: 2021-09-09 Red Hat Virtualization 4.4 Package Manifest Package listing for Red Hat Virtualization 4.4 Red Hat Virtualization Documentation Team Red Hat Customer Content Services [email protected] Legal Notice Copyright © 2021 Red Hat, Inc. The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/ . In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, the Red Hat logo, JBoss, OpenShift, Fedora, the Infinity logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. Linux ® is the registered trademark of Linus Torvalds in the United States and other countries. Java ® is a registered trademark of Oracle and/or its affiliates. XFS ® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL ® is a registered trademark of MySQL AB in the United States, the European Union and other countries. Node.js ® is an official trademark of Joyent. -
Lecture 11 Firewalls
BSc in Telecommunications Engineering TEL3214 Computer Communication Networks Lecture 11 Firewalls Eng Diarmuid O'Briain, CEng, CISSP 11-2 TEL3214 - Computer Communication Networks Copyright © 2017 Diarmuid Ó Briain 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". TEL3214 Firewalls 09 May 2017 TEL3214 - Computer Communication Networks 11-3 Table of Contents 1. AN INTRODUCTION TO FIREWALLS........................................................................................................................5 2. THE DIGITAL SECURITY PROBLEM...........................................................................................................................5 2.1 HOME......................................................................................................................................................................5 2.2 ENTERPRISE...............................................................................................................................................................6 2.3 ROAMING INDIVIDUAL.................................................................................................................................................6 2.4 PERIMETER DEFENCE AND FIREWALLS.............................................................................................................................6 -
FIPS 140-2 Non-Proprietary Security Policy Oracle Linux 7 Libreswan
FIPS 140-2 Non-Proprietary Security Policy Oracle Linux 7 Libreswan Cryptographic Module FIPS 140-2 Level 1 Validation Software Version: R7-2.0.0 Date: April 06, 2018 Document Version 1.2 © Oracle Corporation This document may be reproduced whole and intact including the Copyright notice. Title: Oracle Linux 7 Libreswan Cryptographic Module Security Policy April 06, 2018 Author: Atsec Information Security Contributing Authors: Oracle Linux Engineering Oracle Security Evaluations – Global Product Security Oracle Corporation World Headquarters 500 Oracle Parkway Redwood Shores, CA 94065 U.S.A. Worldwide Inquiries: Phone: +1.650.506.7000 Fax: +1.650.506.7200 oracle.com Copyright © 2018, Oracle and/or its affiliates. All rights reserved. This document is provided for information purposes only and the contents hereof are subject to change without notice. This document is not warranted to be error-free, nor subject to any other warranties or conditions, whether expressed orally or implied in law, including implied warranties and conditions of merchantability or fitness for a particular purpose. Oracle specifically disclaim any liability with respect to this document and no contractual obligations are formed either directly or indirectly by this document. This document may reproduced or distributed whole and intact including this copyright notice. Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners. Oracle Linux 7 Libreswan Cryptographic Module Security Policy i -
Nist Sp 800-77 Rev. 1 Guide to Ipsec Vpns
NIST Special Publication 800-77 Revision 1 Guide to IPsec VPNs Elaine Barker Quynh Dang Sheila Frankel Karen Scarfone Paul Wouters This publication is available free of charge from: https://doi.org/10.6028/NIST.SP.800-77r1 C O M P U T E R S E C U R I T Y NIST Special Publication 800-77 Revision 1 Guide to IPsec VPNs Elaine Barker Quynh Dang Sheila Frankel* Computer Security Division Information Technology Laboratory Karen Scarfone Scarfone Cybersecurity Clifton, VA Paul Wouters Red Hat Toronto, ON, Canada *Former employee; all work for this publication was done while at NIST This publication is available free of charge from: https://doi.org/10.6028/NIST.SP.800-77r1 June 2020 U.S. Department of Commerce Wilbur L. Ross, Jr., Secretary National Institute of Standards and Technology Walter Copan, NIST Director and Under Secretary of Commerce for Standards and Technology Authority This publication has been developed by NIST in accordance with its statutory responsibilities under the Federal Information Security Modernization Act (FISMA) of 2014, 44 U.S.C. § 3551 et seq., Public Law (P.L.) 113-283. NIST is responsible for developing information security standards and guidelines, including minimum requirements for federal information systems, but such standards and guidelines shall not apply to national security systems without the express approval of appropriate federal officials exercising policy authority over such systems. This guideline is consistent with the requirements of the Office of Management and Budget (OMB) Circular A-130. Nothing in this publication should be taken to contradict the standards and guidelines made mandatory and binding on federal agencies by the Secretary of Commerce under statutory authority.