Fortinet white logo
Fortinet docs logo DOCUMENT LIBRARY
Fortinet white logo
Fortinet docs logo DOCUMENT LIBRARY
Products Best Practices Hardware Guides Products A-Z
Summary
By Solution
By 4D Pillars
By Cloud
Secure Networking
Unified SASE
Security Operations
Secure SD-WAN
Secure Access Service Edge (SASE)
ZTNA
LAN Edge
Identity and Access Management
Next Generation Firewall
Public Cloud
Private Cloud
FortiCloud
Secure Networking
  • Hybrid Mesh Firewall
  • NOC Management
  • LAN
  • WAN
    • More >>
    Unified SASE
  • Single Vendor SASE
  • Cloud Network Security
  • Secure Endpoint Connectivity
  • Web Application / API Protection
    • More >>
    Security Operations
  • Security Operations Automation
  • Identity
  • Early Detection & Prevention
    • More >>
    Secure Networking
  • Hybrid Mesh Firewall
  • NOC Management
  • LAN
  • WAN
  • Communication & Surveillance
    • Unified SASE
  • Single Vendor SASE
  • Secure Endpoint Connectivity
  • Cloud Network Security
  • Cloud-Native Security
  • Web Application / API Protection
    • Security Operations
  • Security Operations Automation
  • Endpoint
  • Data Protection
  • Identity
  • Email
  • Early Detection & Prevention
  • Expert Services
  • Edge Firewall
  • Orchestration & management
  • SD Branch
  • Application Delivery
  • Single Vendor SASE
  • Secure Endpoint Connectivity
  • Secure Private Access
  • Thin Edge
  • Identity
  • Application Gateway
  • Enterprise Asset Management
  • Endpoint Agent
  • Agentless Security Posture
  • Identity
  • Wireless
  • Switching
  • Identity
  • Privilege Acccess Management
  • Next Generation Firewall
  • Orchestration & management
  • Expert Services
  • All
  • All
  • Account Management
  • SAAS Management
  • SAAS Application Security
  • Managed Services
  • Platform as a service (PAAS)
  • Other SAAS Services
    • 4D Resources
    Solution Hubs
  • 4D Pillars
  • Cloud
  • Popular Solutions

    • FortiOS Release Notes

    Home FortiGate / FortiOS 6.4.1 FortiOS Release Notes
    6.4.1
    7.6.0
    7.4.5
    7.4.4
    7.4.3
    7.4.2
    7.4.1
    7.4.0
    7.2.10
    7.2.9
    7.2.8
    7.2.7
    7.2.6
    7.2.5
    7.2.4
    7.2.3
    7.2.2
    7.2.1
    7.2.0
    7.0.16
    7.0.15
    7.0.14
    7.0.13
    7.0.12
    7.0.11
    7.0.10
    7.0.9
    7.0.8
    7.0.7
    7.0.6
    7.0.5
    7.0.4
    7.0.3
    7.0.2
    7.0.1
    7.0.0
    6.4.15
    6.4.14
    6.4.13
    6.4.12
    6.4.11
    6.4.10
    6.4.9
    6.4.8
    6.4.7
    6.4.6
    6.4.5
    6.4.4
    6.4.3
    6.4.2
    6.4.1
    6.4.0
    6.2.16
    6.2.15
    6.2.14
    6.2.13
    6.2.12
    6.2.11
    6.2.10
    6.2.9
    6.2.8
    6.2.7
    6.2.6
    6.2.5
    6.2.4
    6.2.3
    6.2.2
    6.2.1
    6.2.0
    6.0.18
    6.0.17
    6.0.16
    6.0.15
    6.0.14
    6.0.13
    6.0.12
    6.0.11
    6.0.10
    6.0.9
    6.0.8
    6.0.7
    6.0.6
    6.0.5
    6.0.4
    6.0.3
    6.0.2
    6.0.1
    6.0.0
    5.6.14
    5.6.13
    5.6.12
    5.6.11
    5.6.10
    5.6.9
    5.6.8
    5.6.7
    5.6.6
    5.6.5
    5.6.4
    5.6.3
    5.6.2
    5.6.1
    5.6.0
    5.4.13
    5.4.12
    5.4.11
    5.4.10
    5.4.9
    5.4.8
    5.4.7
    5.4.6
    5.4.5
    5.4.4
    5.4.3
    5.4.2
    5.4.1
    5.4.0
    5.2.15
    5.2.14
    5.2.13
    5.2.12
    5.2.11
    5.2.10
    5.2.9
    5.2.8
    5.2.7
    5.2.6
    5.2.5
    5.2.4
    5.2.3
    5.2.2
    5.2.1
    5.2.0
    5.0.14
    5.0.13
    5.0.12
    5.0.11
    5.0.10
    5.0.9
    5.0.8
    5.0.7
    5.0.6
    5.0.5
    5.0.4
    5.0.3
    5.0.2

    Proxy web filter with SSL inspection may fail for websites that allow TLS versions below 1.3 after upgrading to FortiOS 6.4.1

    Proxy web filter with SSL inspection may fail for websites that allow TLS versions below 1.3 after upgrading to FortiOS 6.4.1

    Bug ID

    Description

    617934

    If web filtering is enabled using a proxy-based firewall policy with SSL inspection also enabled, then connections to servers that still support less secure TLS versions may fail. Browser errors seen:

    Chrome: ERR_CONNECTION_CLOSED

    Firefox: PR_END_OF_FILE_ERROR

    Workaround: toggle affected firewall policies to flow-based inspection.
    Previous
    Next

    Proxy web filter with SSL inspection may fail for websites that allow TLS versions below 1.3 after upgrading to FortiOS 6.4.1

    Proxy web filter with SSL inspection may fail for websites that allow TLS versions below 1.3 after upgrading to FortiOS 6.4.1

    Bug ID

    Description

    617934

    If web filtering is enabled using a proxy-based firewall policy with SSL inspection also enabled, then connections to servers that still support less secure TLS versions may fail. Browser errors seen:

    Chrome: ERR_CONNECTION_CLOSED

    Firefox: PR_END_OF_FILE_ERROR

    Workaround: toggle affected firewall policies to flow-based inspection.
    Previous
    Next