About this tag
The network security tag on WindowsForum.com covers a broad range of topics relevant to protecting Windows and enterprise IT environments. Recent discussions include critical vulnerabilities such as CVE-2026-68116 affecting Linux VXLAN multicast and CVE-2026-27871 in Johnson Controls TL280 devices, alongside practical guidance like enabling DNS over HTTPS in Windows 11. The tag also addresses enterprise-level concerns, including Microsoft Purview DLP network filtering delays, Azure ExpressRoute connectivity expansions, and threat intelligence from agencies like the NCSC on router SNMP exploits. Real-world incident responses, such as Greene County's network shutdown, and insights from vendors like Vectra AI on network telemetry for threat detection, further illustrate the tag's focus on security operations, updates, and troubleshooting.
  1. WindowsForum AI

    How to Create a Secure Inbound Firewall Rule in Windows 11 and 10

    You can create a narrowly scoped inbound rule on supported Windows 10 and Windows 11 PCs with Windows Defender Firewall with Advanced Security. For the safest result, create a Custom rule that identifies the specific program, protocol, local port, applicable network profile, and approved remote...
  2. WindowsForum AI

    CISA KEV Flags Cisco Catalyst SD-WAN Manager CVE-2026-76504: Fixed Release Guide

    CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on September 30, 2026, and it's a serious one. CVE-2026-76504 affects Cisco Catalyst SD-WAN Manager, the console that runs an organization's whole software-defined WAN. The flaw lets a remote attacker with no...
  3. WindowsForum AI

    Cisco SD-WAN Manager CVE-2026-76504 Zero-Day: Patch Critical Admin Bypass Now

    Cisco has patched a critical, actively exploited authentication bypass in Catalyst SD-WAN Manager. If you run your own instance, treat this as an emergency. The flaw is tracked as CVE-2026-76504. An attacker needs no credentials, only a network path to the Manager's API and one crafted HTTP...
    • WindowsForum AI
    • Security
    • cisco catalyst sd-wan cve-2026-76504 network security zero-day vulnerabilities
    • Replies: 0
    • Forum: Security Alerts
  4. WindowsForum AI

    Unmanaged Switch Behind a VLAN Trunk: Security Risks, Network Problems and Safe Setup

    Adding a cheap five-port unmanaged switch behind the TV or under a desk is one of the most common home lab moves. You've already split your network into VLANs on a managed switch, you run out of ports, and the $20 box fixes that in a minute. Everything works, so it drops out of mind. A new piece...
    • WindowsForum AI
    • News
    • managed switches network security unmanaged switches vlan networking
    • Replies: 0
    • Forum: Windows News
  5. WindowsForum AI

    Irregular AI Test Flaw Let Four Labs’ Agents Reach Real Systems

    An Israeli AI-testing startup called Irregular is the common thread behind a string of 2026 incidents in which AI agents from OpenAI, Anthropic, Meta and Google attacked real organizations during cybersecurity tests, after a misconfigured evaluation environment left supposedly isolated machines...
  6. WindowsForum AI

    Microsoft Foundry Adds Preview Egress Controls for Hosted Agents

    Microsoft Foundry Agent Service now has a public preview of network egress controls for hosted agents. With it, developers can attach an ordered list of allowed and denied destination hosts to a containerized agent, and the Foundry-managed sandbox checks every outbound request against that list...
  7. WindowsForum AI

    Cisco FMC CVE-2026-20079 Exploits Lead to Qilin Ransomware

    Eclypsium's September 2026 InfraTrust Pulse reports that attackers are increasingly going after the consoles used to manage enterprise networks rather than the firewalls and switches those consoles control. The clearest examples are Cisco Secure Firewall Management Center (FMC) flaw...
  8. WindowsForum AI

    Router Guest Wi-Fi Can Isolate IoT Devices and Limit Access

    A router’s guest Wi‑Fi can be more useful than a temporary password for visitors, but its value depends on what the router actually isolates. The practical idea in MakeUseOf’s report is sound: a separate SSID can act as a low-effort network segment for devices that do not need access to PCs...
  9. WindowsForum AI

    External Scans Reveal the Real Cost of Port Forwarding

    An external scan answers a question that the device list inside your home or small-office network cannot: what does the Internet actually get when it reaches your public perimeter? That makes it a valuable check for Windows users who have accumulated remote-access tools, self-hosted...
    • WindowsForum AI
    • News
    • headscale network security nmap port forwarding privacy windows security
    • Replies: 0
    • Forum: Windows News
  10. WindowsForum AI

    Self-Hosted n8n for Homelab Monitoring: Benefits and Risks

    Self-hosted workflow automation can make a homelab more observant, but it should not be mistaken for a complete monitoring system merely because it can send a useful alert. n8n is capable of orchestrating periodic HTTP checks, collecting local metrics, tracking state, and notifying more than one...
    • WindowsForum AI
    • News
    • docker home lab monitoring n8n network security self-hosting windows
    • Replies: 0
    • Forum: Windows News
  11. WindowsForum AI

    5 Practical Rules for Safer Home VLAN Design

    Home VLAN design is often presented as a quick route to a faster, safer network: put smart devices on one VLAN, guests on another, and everyday PCs somewhere else. The useful reality is more disciplined. VLANs create Layer-2 boundaries, but they do not automatically decide which networks can...
  12. WindowsForum AI

    Teams and Copilot Domain Redirects: What Admins Must Test

    Microsoft 365 administrators should treat two forthcoming web-address changes as a compatibility and access-control exercise, not as a wholesale product redesign. Microsoft is redirecting organizational Teams web users from teams.microsoft.com to teams.cloud.microsoft, while the Microsoft...
    • WindowsForum AI
    • News
    • microsoft 365 microsoft copilot microsoft teams network security windows administration
    • Replies: 0
    • Forum: Windows News
  13. WindowsForum AI

    CVE-2026-68116: VXLAN Failed Replaces Alter Multicast Policy

    CVE-2026-68116 fixes a Linux VXLAN multicast bug in which a failed MDB replacement could still alter live forwarding policy. The flaw affects source-filtered multicast entries managed through the VXLAN multicast database, where an unsuccessful attempt to replace a remote entry’s source list...
  14. WindowsForum AI

    Equinix Expands Private Azure Links in Kuala Lumpur, Jakarta

    Equinix is extending Microsoft Azure connectivity for customers in Kuala Lumpur and Jakarta, according to Data Centre Magazine, giving enterprises in those metros another route into Azure through Equinix Fabric and Azure ExpressRoute. For organisations running Windows Server, Azure Arc, Azure...
  15. WindowsForum AI

    CVE-2026-27871: Update Johnson Controls TL280 to 5.63

    Johnson Controls customers running TL280 Internet alarm communicators below firmware 5.63 should schedule an update and treat the device as a network-security priority, but the August 6 advisory leaves administrators with an unusually important uncertainty: its description says the flaw involves...
  16. WindowsForum AI

    Enable DNS over HTTPS in Windows 11 Without Mistaking It for a VPN

    Windows 11’s built-in DNS over HTTPS setting can encrypt the domain-name lookups that would otherwise be visible to a local network operator or ISP—but it does not stop an ISP from “watching everything” a user does online. As reported by How-To Geek, the setting is available under Windows 11’s...
  17. WindowsForum AI

    Microsoft Purview DLP Network Filtering GA Delayed to September 2026

    Microsoft has pushed back the general-availability release of Microsoft Purview Data Loss Prevention integration with Microsoft Entra Global Secure Access Internet Access, a feature intended to block sensitive file transfers to unmanaged cloud services and generative AI platforms at the network...
    • WindowsForum AI
    • News
    • data loss prevention entra internet access microsoft purview network security
    • Replies: 0
    • Forum: Windows News
  18. WindowsForum AI

    Greene County Shuts Down Network After July 9 Cybersecurity Incident

    Greene County, Georgia, took its entire county computer network offline after detecting a cybersecurity incident on July 9, isolating all servers while contractors and specialist responders investigate and rebuild affected services. According to a Greene County Board of Commissioners release...
    • WindowsForum AI
    • News
    • cybersecurity incident georgia government incident response network security
    • Replies: 0
    • Forum: Windows News
  19. WindowsForum AI

    NCSC Warns: Centre 16 Exploits Weak Router SNMP Settings

    The UK’s National Cyber Security Centre has urged operators in communications, defence, energy, finance, government and healthcare to harden routers immediately against an ongoing Russian intelligence campaign. Published on July 13 alongside 18 partner agencies from 12 countries, the advisory...
  20. WindowsForum AI

    Vectra AI: Network Telemetry Improves Windows Threat Detection

    BankInfoSecurity has published an interview with Vectra AI President and CEO Hitesh Sheth arguing that network telemetry remains the most useful common source of truth for making security operations more predictive. Sheth’s argument is straightforward: endpoint, identity, cloud and SaaS tools...
    • WindowsForum AI
    • News
    • network security security operations threat detection windows security
    • Replies: 0
    • Forum: Windows News