+Limit Access to Resource Over Network

Limit Access to Resource Over Network

Restrict access to network resources, such as file shares, remote systems, and services, to only those users, accounts, or systems with a legitimate business requirement. This can include employing technologies like network concentrators, RDP gateways, and zero-trust network access (ZTNA) models, alongside hardening services and protocols. This mitigation can be implemented through the following measures: Audit and Restrict Access: - Regularly audit permissions for file shares, network services, and remote access tools. - Remove unnecessary access and enforce least privilege principles for users and services. - Use Active Directory and IAM tools to restrict access based on roles and attributes. Deploy Secure Remote Access Solutions: - Use RDP gateways, VPN concentrators, and ZTNA solutions to aggregate and secure remote access connections. - Configure access controls to restrict connections based on time, device, and user identity. - Enforce MFA for all remote access mechanisms. Disable Unnecessary Services: - Identify running services using tools like netstat (Windows/Linux) or Nmap. - Disable unused services, such as Telnet, FTP, and legacy SMB, to reduce the attack surface. - Use firewall rules to block traffic on unused ports and protocols. Network Segmentation and Isolation: - Use VLANs, firewalls, or micro-segmentation to isolate critical network resources from general access. - Restrict communication between subnets to prevent lateral movement. Monitor and Log Access: - Monitor access attempts to file shares, RDP, and remote network resources using SIEM tools. - Enable auditing and logging for successful and failed attempts to access restricted resources. *Tools for Implementation* File Share Management: - Microsoft Active Directory Group Policies - Samba (Linux/Unix file share management) - AccessEnum (Windows access auditing tool) Secure Remote Access: - Microsoft Remote Desktop Gateway - Apache Guacamole (open-source RDP/VNC gateway) - Zero Trust solutions: Tailscale, Cloudflare Zero Trust Service and Protocol Hardening: - Nmap or Nessus for network service discovery - Windows Group Policy Editor for disabling SMBv1, Telnet, and legacy protocols - iptables or firewalld (Linux) for blocking unnecessary traffic Network Segmentation: - pfSense for open-source network isolation

1. Overview

1.1 References

1.2 Identified Requirements

1.3 Related Regulations

2. Identified Requirements

Requirements

3. Related Regulations

Regulations

Linked Issues

Issuelinks
is related to Mitigations
blocks Pre-OS Boot
blocks Adversary-in-the-Middle
blocks RDP Hijacking
blocks Cloud Instance Metadata API
blocks Build Image on Host
blocks Remote Desktop Protocol
blocks Remote Services
blocks Hardware Additions
blocks TFTP Boot
blocks Container API
blocks Deploy Container
blocks External Remote Services
blocks Unsecured Credentials
blocks SMB/Windows Admin Shares
blocks Container and Resource Discovery
blocks Exploit Public-Facing Application
blocks ARP Cache Poisoning
blocks Accessibility Features
blocks Container Administration Command
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