Even with a clean download, users encounter roadblocks. Here is the troubleshooting matrix for 9.1.15:
| Error Code | Message | Fix |
| :--- | :--- | :--- |
| 13358 | "Connection interrupted by server" | Server is likely newer. Downgrade the server or upgrade client. |
| 12057 | "Certificate validation failed" | The server certificate is self-signed or expired. Import the root CA via the Pulse client (File > Import). |
| 13401 | "Host Checker failed" | Your antivirus is blocking the Host Checker process. Add pulse.exe and nclauncher.exe to AV exclusions. |
| macOS Crash | "Pulse quit unexpectedly" | You likely denied the system extension. Run sudo spctl --master-disable in Terminal temporarily. |
Windows Registry Tweak for 9.1.15: If the VPN connects but you have no internet split-tunneling issues, run reg add "HKLM\SOFTWARE\Pulse Secure\Client" /v DisableIPv6 /t REG_DWORD /d 1 /f and reboot.
Pulse Secure 9.1.15 is a stable, reliable, and lightweight VPN client that serves its primary purpose well: connecting users to corporate networks securely. However, it is now dated and officially superseded. While fine for legacy environments, you should look to upgrade if security or modern OS compatibility is a concern.
Ivanti recommends moving to a supported version if possible:
However, if your VPN gateway is truly stuck on 9.1.15 compatibility, you have no safe choice but the official MSI.
Pulse Secure Client 9.1.15 (often referencing the 9.1Rx release train) is a legacy enterprise mobility and VPN solution designed to provide secure, authenticated access to corporate networks and applications. It serves as the desktop and mobile interface for the Pulse Connect Secure (PCS) appliance.
While Ivanti (the current owner of the Pulse Secure portfolio) has transitioned many organizations to the newer "Ivanti Secure Access" client, version 9.1.15 remains a critical download for organizations maintaining specific legacy infrastructure or those utilizing on-premise PCS appliances that have not yet migrated to the latest iteration.
If you are a home user trying to connect to a corporate VPN:
If you need Pulse/Ivanti VPN but a newer version:
For general VPN needs on older hardware:
| Feature | Detail | |---------|--------| | Release type | Maintenance release | | Based on | Pulse Secure 9.1.x branch | | Key fixes | Security patches (pre- Log4j), TLS improvements, macOS keychain updates | | Supported OS | Windows 7/8.1/10, macOS 10.14–11, some Linux distributions | | Current status | End-of-life (no new security patches) | Download Pulse Secure 9.1.15
2.5 / 5 – It works for its original niche, but do not install 9.1.15 unless explicitly required by an isolated, legacy work environment. For any internet‑facing or modern OS use, find a newer version or different VPN client.
To ensure the integrity of the software, downloads should only be performed through authorized channels:
Ivanti Success Portal: The primary source for enterprise customers is the Ivanti/Pulse Secure Download Center. You must log in with an active customer account (onboarded at my.pulsecure.net) to access the Licensing and Download Center.
Product Rebranding: Note that the software is now often listed under Ivanti Connect Secure (ICS) or Ivanti Policy Secure (IPS).
Institutional Libraries: Some organizations, such as UC Davis, provide direct links for their specific users to ensure they are on version 9.1.15 to maintain compatibility with updated server environments. 2. Key Features of Release 9.1R15
Released in April 2022, this version introduced several noteworthy updates:
Security Hardening: Includes fixes for specific "PRs" (Problem Reports) regarding fixed and known issues identified in previous 9.1Rx builds.
Branding Updates: Transitioned documentation and UI elements to Ivanti branding.
Legacy Support: Continues to support PSA hardware platforms including PSA300, PSA3000, PSA5000, and PSA7000. 3. Installation & Technical Requirements
Operating Systems: Compatible with Windows (32-bit, 64-bit, ARM64), macOS, Linux, iOS, and Android.
Manual Upgrades: If your current client is older than 9.1.15, it may not automatically prompt for an upgrade to the newer Ivanti-branded versions, requiring a manual download and install. Even with a clean download, users encounter roadblocks
Virtual Appliances: Available for Virtual Pulse Secure Appliance (PSA-V) on VMware, though VA-DTE is no longer supported as of the 9.1R1 release. 4. Security Recommendation
As Ivanti has announced the End of Life for Pulse Secure Appliances, it is critical to verify if your organization has moved to newer versions (e.g., 9.1R16 or later) to address newer vulnerabilities. Always verify the MD5 signature provided in the download center before executing the installer to ensure the file has not been tampered with. Pulse Secure 9.1R16.2 - Knowledge Base - ServiceHub
Pulse Secure version 9.1.15 (officially 9.1R15) is a critical maintenance release in the transition of Pulse Secure products to the Ivanti brand. This version is often required as a baseline for users to receive future automatic updates under the new Ivanti Secure Access Client branding. Where to Download
You should always download Pulse Secure software from official or authorized sources to ensure security:
Official Support Portal: The primary source for all releases is the Ivanti Licensing and Download Center. You will need an active support account to log in and access the software packages.
Institutional Links: Many universities and organizations provide direct downloads for their members. For example, UC Davis and other institutions host the 9.1.15 installer for their specific VPN configurations.
Mobile Versions: For mobile devices, you can find the latest version on the Microsoft Store for Windows or the respective app stores for iOS and Android. Key Features in 9.1.15
This release introduced several enhancements and stability fixes:
HTML5 Bookmarks: End users can now create their own SSH, Telnet, or VNC HTML5 bookmarks.
Session Recording: Administrators can now control and store session recordings for Advanced HTML5 sessions.
Intune Integration: Enhanced device attribute retrieval and compliance checking for Microsoft Intune. Pulse Secure 9
Critical Baseline: If your version is older than 9.1.15, the client may not automatically prompt you to upgrade to the newer Ivanti-branded versions (22.x series). How to Install
Verify Your Version: Open your current Pulse Secure client and go to Help > About. If it is older than 9.1.15, an upgrade is recommended.
Run the Installer: Download the .msi (Windows) or .dmg (macOS) file. Run the installer and follow the on-screen prompts.
Automatic Rebranding: Upon installing 9.1.15 or subsequent versions, you may notice the icon change from the Pulse Secure "S" to the Ivanti logo.
Configuration: If this is a fresh install, click the "+" icon to add a new connection. Enter the Name and Server URL provided by your IT department.
Pulse Secure Desktop Client Configuration on Pulse Connect Secure
Pulse Secure (now Ivanti Secure Access Client is a maintenance release designed to provide secure, authenticated access to corporate resources. Because Ivanti has transitioned to a newer product lifecycle, finding the direct installer for this specific legacy version typically requires access to a licensed Ivanti customer portal. Key Features of Version 9.1.15 Security Patches
: Includes critical fixes for vulnerabilities identified in previous 9.x releases. OS Compatibility
: Supports Windows 10/11, macOS, and various Linux distributions. Traffic Tunneling
: Provides split-tunneling and full-tunneling options for remote workers. Multi-Factor Authentication (MFA)
: Seamless integration with providers like Duo, Microsoft Authenticator, and RSA. Where to Download Official Ivanti Success Portal : The safest and most reliable source is the Ivanti Global Support Center
. You will need a registered account and an active support contract to access the "Downloads" section. Corporate IT Portals
: If you are an employee, most organizations host the specific approved version of the client on their internal VPN landing page (e.g.,