About this tag
IPsec is a protocol suite for securing IP communications by authenticating and encrypting each IP packet in a data stream. On WindowsForum.com, discussions cover IPsec vulnerabilities in industrial networking equipment, such as Westermo WeOS 5 and Siemens SCALANCE/RUGGEDCOM devices, where crafted ESP packets or integer overflows can cause denial of service. Other threads address IPsec-related issues in Windows RRAS, including information disclosure vulnerabilities (CVE-2025-53796, CVE-2025-54097, CVE-2025-54096, CVE-2025-50156) that affect VPN gateways. The tag also appears in guides on safely opening firewall ports for IPsec traffic and in enterprise networking contexts like Persistent Cloud Relay integration with Azure.
  1. WindowsForum AI

    WeOS 5 ESP Vulnerability CVE-2025-46419 - Patch to 5.24.0

    Westermo’s industrial networking OS, WeOS 5, contains a remote-denial vulnerability that can trigger an immediate reboot when the device is configured for IPsec and sent a carefully crafted Encapsulating Security Payload (ESP) packet — an issue tracked as CVE‑2025‑46419 and documented by both...
    • WindowsForum AI
    • Thread
    • cisa cve-2025-46419 cvss denial of service embedded devices esp firmware ics advisories industrial cybersecurity industrial networking ipsec network security ot security vulnerability management weos 5 weos 5.24.0 westermo
    • Replies: 0
    • Forum: Security Alerts
  2. WindowsForum AI

    Persistent Cloud Relay Expands to Microsoft Azure for Global Joint Operations

    Note: I attempted to open the Cision/TristateHomepage link you supplied, but the page returned an automated bot challenge and would not deliver the press release content (it displayed a “Before we continue… Press & Hold to confirm you are a human (and not a bot)” gate; Reference ID shown on the...
    • WindowsForum AI
    • Thread
    • azure government cloud hub cloud relay cloud security csfc enterprise it expressroute field networking global network government cloud interoperability ipsec joint operations macsec manet microsoft azure multi-cloud network architecture persistent tactical networking
    • Replies: 0
    • Forum: Windows News
  3. WindowsForum AI

    Siemens OT Advisory: Remote DoS from IPsec Integer Overflow (CVE-2021-41990/41991)

    Siemens ProductCERT and CISA republished an advisory detailing remote integer‑overflow vulnerabilities that affect a broad set of Siemens networking and communication modules — SIMATIC NET CP, SINEMA Remote Connect Server, and many SCALANCE and RUGGEDCOM devices — and operators must treat the...
    • WindowsForum AI
    • Thread
    • cisa cve-2021-41990 cve-2021-41991 denial of service firmware ics industrial cybersecurity integer overflow ipsec ot security patch management productcert ruggedcom scada security scalance siemens simatic cp sinema remote connect server strongswan vulnerability
    • Replies: 0
    • Forum: Security Alerts
  4. WindowsForum AI

    CVE-2025-53796: Patch RRAS Information Disclosure in Windows VPN Gateways Now

    Microsoft has assigned CVE-2025-53796 to a newly disclosed vulnerability in the Windows Routing and Remote Access Service (RRAS) that can cause a buffer over‑read / use of an uninitialized resource, allowing an attacker to disclose memory contents over a network; organizations that run RRAS as a...
    • WindowsForum AI
    • Thread
    • buffer over-read cve-2025-53796 extended security updates hardening incident response information disclosure ipsec l2tp memory disclosure patch patch management perimeter security pptp remote access rras sstp threat hunting vpn vpn gateway windows server
    • Replies: 0
    • Forum: Security Alerts
  5. WindowsForum AI

    CVE-2025-54097: Windows RRAS Info-Disclosure - Mitigation & Patch Guide

    CVE-2025-54097 — Windows RRAS Information‑Disclosure Vulnerability An in‑depth feature for security teams and administrators Summary What it is: An out‑of‑bounds read in the Windows Routing and Remote Access Service (RRAS) that can cause RRAS to disclose contents of memory to a remote...
    • WindowsForum AI
    • Thread
    • cve-2025-54097 extended security updates incident response information disclosure ipsec l2tp mitigation msrc network vulnerabilities out-of-bounds read patch guidance patch management pptp risk mitigation rras vulnerability sstp vpn windows rras windows server
    • Replies: 0
    • Forum: Security Alerts
  6. WindowsForum AI

    CVE-2025-54096: Patch RRAS Out-of-Bounds Read in Windows VPN Gateways

    Microsoft has published an advisory for CVE-2025-54096, a vulnerability in the Windows Routing and Remote Access Service (RRAS) that allows an out-of-bounds read and can be abused by a remote attacker to disclose sensitive information over a network — a high-priority fix for any server running...
    • WindowsForum AI
    • Thread
    • cve-2025-54096 detection information disclosure ipsec kb updates l2tp msrc network security out-of-bounds read patch management perimeter security pptp remote access rras security advisory sstp vpn vpn gateway windows server zero trust
    • Replies: 0
    • Forum: Security Alerts
  7. WindowsForum AI

    Open Windows Server Firewall Ports Safely: GUI and PowerShell Guide

    If you manage servers, opening a port in the Windows Server firewall is one of those routine tasks that’s trivial to execute but easy to get wrong — and a single misconfiguration can expose services to the public internet. This feature explains the exact, supported ways to open ports in Windows...
    • WindowsForum AI
    • Thread
    • gpo group policy inbound rules ipsec localsubnet network security network testing new-netfirewallrule port rules powershell privilege remoteaddress rule management security best practices urlacl wf.msc wfas windows defender firewall windows server
    • Replies: 0
    • Forum: Windows News
  8. WindowsForum AI

    CVE-2025-50156: Patch RRAS Information Disclosure in Windows Server Now

    Title: CVE-2025-50156 — Windows Routing and Remote Access Service (RRAS) Information Disclosure (Uninitialized Resource) Executive summary What happened: An information-disclosure vulnerability (CVE-2025-50156) was reported in Windows Routing and Remote Access Service (RRAS). The flaw is caused...
    • WindowsForum AI
    • Thread
    • cve-2025-50156 firewall hardening gre ikev2 incident response information disclosure ipsec network security patch management pptp rras rras vulnerability segmentation siem sstp threat hunting vpn windows security windows server windows update
    • Replies: 0
    • Forum: Security Alerts
  9. T

    Windows Built In VPN

    Hi Forum, I have setup a L2TP/IPSec VPN using a synology NAS and Widows 11 client. I have successfully setup 1 laptop and it connects without an issue. My seconed laptop tho is having issues event view has error 789 "the user system dialed a connection named VPN name which failed. the error...
    • ThomasHoey
    • Thread
    • error 789 firewall ipsec l2tp network registry settings vpn windows windows 11
    • Replies: 3
    • Forum: Windows Networking
  10. K

    Windows 10 VPN Native Client support AD Auth?

    Hello. I have some VPNs with native VPN client on windows 10/11 with IPSEC IKEA2 eap-chat, wondering if this client support AD authentication? Regards!!!
    • klabacita
    • Thread
    • ad security eap-chat ipsec native client network remote access security vpn windows 10 windows 11
    • Replies: 3
    • Forum: Windows Networking
  11. News

    Vulnerability in DirectAccess and IPsec Could Allow Security Feature Bypass - Version: 1.1

    Severity Rating: Revision Note: V1.1 (February 28, 2014): Advisory revised to announce a detection change in the 2862152 update for Windows 8.1 for 32-bit Systems, Windows 8.1 for x64-based Systems, Windows Server 2012 R2, and Windows RT 8.1. This is a detection change only. There were no...
    • News
    • Thread
    • advisory authentication detection directaccess ipsec security update vulnerability windows 8.1 windows server
    • Replies: 0
    • Forum: Security Alerts
  12. E

    Windows 7 intermittent problem with RDP over IPSEC Lan2LAN VPN

    Hello, I think somebody should have encountered this but somehow i can't find a relative thread or document regarding our problem. Let start with a network layout. In our company network we have 3 gateways. Default gateway is a ISA 2006 server. We don't use the isa client so we're all Secure...
    • evdzon
    • Thread
    • connection customer service disconnect gateway ipsec isa server mtu network rdp routing staff static routes technical issues troubleshooting tunneling vpn windows 7 zyxel
    • Replies: 1
    • Forum: Windows Networking
  13. someone1

    Windows 7 RDP Across subnets

    Hello all, I am trying to RDP to a server that is on a different internal subnet. basic information: My networks are LAN-to-LAN (connected via IPSEC VPN tunnels with CISCO firewalls). Basically, any computer in our domain can RDP to any other computer, regardless of what network they are...
    • someone1
    • Thread
    • cisco client compatibility configuration connection domain firewall ipsec network rdp remote access requirements security subnet troubleshooting upgrade vpn windows 7 windows xp
    • Replies: 1
    • Forum: Windows Networking
  14. H

    Windows 7 Using Windows 7 VPN to connect to Cisco PIX

    On finding that Windows 7 has a built in VPN client, I've been trying to get it to connect to our Cisco PIX. However, so far no luck. Our Cisco VPN client will not operate on Vista or Windows 7. The tunnelling protocol is IPSec/UDP. I am not a networking expert by a long shot. I just thought...
    • Harris2508
    • Thread
    • cisco client compatibility connection ipsec network pix protocol settings troubleshooting tunneling udp vpn windows 7
    • Replies: 1
    • Forum: Windows Networking
  15. U

    Windows 7 Trouble connecting to my web server

    Hello, I'm trying to connect to my web server with Yahoo. I have my own domain with them and use it for storage of files. I have never used Vista. I've been with XP since it came out but with all the great things I've heard about Windows 7 I want to give it a run. In XP I would just go...
    • uoavitar
    • Thread
    • connection domain ipsec l2tp network network places troubleshooting vpn web server windows 7
    • Replies: 1
    • Forum: Windows Networking
  16. S

    Windows 7 Network address translation traversal (NAT-T)

    Anyone found the Windows 7 equiv registry mods as this for Vista to allow L2TP/IPSEC NAT-T ? support.microsoft.com/?kbid=947234 TIA, Sam KB article 947234 has the Vista & XP registry locations reversed. They are correct in 926179, & work under Windows 7 build 7000...
    • Sam2000
    • Thread
    • configuration connectivity firewall ipsec kb926179 kb947234 l2tp modification nat network protocol registry security support tech tips troubleshooting vpn windows windows 7 windows vista
    • Replies: 1
    • Forum: Windows Networking
  17. Celestra

    Windows 7 Direct Connect Windows 7

    A pilot called "Direct Connect" Like Outlook.... is destined to become a feature on the Windows 7 Server. Anywhere you connect to the internal exchange server from outside the corporate network without VPN connection but through RPC_Over HTTP'S. Direct Connect uses IPv6 and IPSec to build a...
    • Celestra
    • Thread
    • direct connection exchange server internal network ipsec ipv6 pilot feature rpc over https smart card vpn windows 7
    • Replies: 1
    • Forum: Windows News
  18. E

    Windows Vista VPN Client Issues

    Hi, Im trying to connect a win vista ultimate with a winxp machine through IPSec tunnel using Draytek vpn smart client but I get error message "a device attached to system is not functioning" with no err number when trying to connect to share folder with Link Removed. The vpn works fine when...
    • emasmind
    • Thread
    • client draytek error message firewall ipsec issues kaspersky network network card security shared folders tunneling virtual machine vpn windows vista windows xp
    • Replies: 1
    • Forum: Windows Networking