Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Comments
Access Control Lists: 6 Key Principles to Keep in Mind
Newest First  |  Oldest First  |  Threaded View
paul.dittrich
paul.dittrich,
User Rank: Strategist
1/30/2019 | 3:40:31 PM
Harnessing the power of ACLs
I could not agree more strongly with every point in your column.

It may be fashionable to claim there is no longer a network perimeter but I still strongly favor using the border router as a "garbage filter".

The BOGONs list? - Drop them all.  Invalid TCP flag combinations - Drop.  No Telnet in your environment?  No FTP?  No RDP?  - Block them all at the border router.

As mentioned in the post, the NGFW should take care of the deep packet inspection for only the traffic you potentially want inside your network.  That firewall should see very little traffic except for the known IPs, ports and protocols which are candidates to be allowed all the way in.

And an outbound ACL (a.k.a. egress filtering) is a very powerful weapon against data exfiltration and many types of malware.  You may still have a Trojan but if it can't phone home......


Edge-DRsplash-10-edge-articles
I Smell a RAT! New Cybersecurity Threats for the Crypto Industry
David Trepp, Partner, IT Assurance with accounting and advisory firm BPM LLP,  7/9/2021
News
Attacks on Kaseya Servers Led to Ransomware in Less Than 2 Hours
Robert Lemos, Contributing Writer,  7/7/2021
Commentary
It's in the Game (but It Shouldn't Be)
Tal Memran, Cybersecurity Expert, CYE,  7/9/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Creating an Effective Incident Response Plan
Security teams are realizing their organizations will experience a cyber incident at some point. An effective incident response plan that takes into account their specific requirements and has been tested is critical. This issue of Tech Insights also includes: -a look at the newly signed cyber-incident law, -how organizations can apply behavioral psychology to incident response, -and an overview of the Open Cybersecurity Schema Framework.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2022-40799
PUBLISHED: 2022-11-29
Data Integrity Failure in 'Backup Config' in D-Link DNR-322L <= 2.60B15 allows an authenticated attacker to execute OS level commands on the device.
CVE-2022-41568
PUBLISHED: 2022-11-29
LINE client for iOS before 12.17.0 might be crashed by sharing an invalid shared key of e2ee in group chat.
CVE-2022-43326
PUBLISHED: 2022-11-29
An Insecure Direct Object Reference (IDOR) vulnerability in the password reset function of Telos Alliance Omnia MPX Node 1.0.0-1.4.[*] allows attackers to arbitrarily change user and Administrator account passwords.
CVE-2022-45329
PUBLISHED: 2022-11-29
AeroCMS v0.0.1 was discovered to contain a SQL Injection vulnerability via the Search parameter. This vulnerability allows attackers to access database information.
CVE-2022-44037
PUBLISHED: 2022-11-29
An access control issue in APsystems ENERGY COMMUNICATION UNIT (ECU-C) Power Control Software V4.1NA, V3.11.4, W2.1NA, V4.1SAA, C1.2.2 allows attackers to access sensitive data and execute specific commands and functions with full admin rights without authenticating allows him to perform multiple at...