Forticlient ошибка 455

Hey Guys, 

Hoping someone can shed some light on this problem I’m having, Google hasn’t been much help unfortunately. 

I’ve set up an SSL-tunnel VPN for users to connect to our network remotely. Everything seems OK for most users, except for 2 of them. Two users receive [style=»background-color: #ffff00;»]»Permission Denied -455″[/style] error message when attempting to connect to the VPN with FortiClient. Users credentials are getting checked against an LDAP connection which I know works because other users are having no issues and I’ve tried their accounts locally inside the network with my FortiClient. Users are also able to login normally when using domain workstations.

Is this more likely a problem with FortiClient or perhaps their home network? I’m currently working on troubleshooting with the users about their home networks, block ports, router configuration, etc…

FortiGate 800C

Firmware 5.2.4 build 688

Thanks for any insight guys.

Cheers,

/Matt

Introduction:

             FortiClient extends the power of
FortiGate’s Unified threat management to endpoints on your network. Desktops,
laptops, tablets and smartphones, FortiClient enables every device — local or
remote, stationary or mobile — to integrate with your FortiGate. With no
per-seat license fees, FortiClient takes the headaches out of managing multiple
endpoints so your users and guests can work efficiently anywhere, without
compromising your security. It’s the end-point solution for your FortiGate
network.

The FortiClient
software provides a variety of features, including antivirus, web
filtering, firewall, and parental controls, to individual computers and mobile
devices. It can also be used to connect to a FortiGate using either an SSL or
IPsec VPN.

Forticlient VPN configuration:

Virtual
Private Network (VPN) technology enables remote users to connect to private
computer networks to gain access to their resources in a secure way. For
example, an employee traveling or working from home can use a VPN to securely
access TeraTerm and Network Drives through the Internet.

VPN gateways:

A
gateway is a router that connects the local network to other networks. The
default gateway setting in your computer’s TCP/IP properties specifies the
gateway for your local network.

A
VPN gateway functions as one end of a VPN tunnel. It receives incoming IPsec
packets, decrypts the encapsulated data packets and passes the data packets to
the local network. Also, it encrypts data packets destined for the other end of
the VPN tunnel, encapsulates them, and sends the IPsec packets to the other VPN
gateway. The VPN gateway is a FortiGate unit because the private network behind
it is protected, ensuring the security of the unencrypted VPN data. The gateway
can also be FortiClient software running on a PC since the unencrypted data is
secure on the PC.

The
IP address of a VPN gateway is usually the IP address of the network interface
that connects to the Internet. Optionally, you can define a secondary IP
address for the interface and use that address as the local VPN gateway
address. The benefit of doing this is that your existing setup is not affected
by the VPN settings.

The
following diagram shows a VPN connection between two private networks with
FortiGate units acting as the VPN gateways. This configuration is commonly
referred to as Gateway-to-Gateway IPsec VPN.

VPN
tunnel between two private networks:

Fig : 1

FortiClient
Benefits:

Unified endpoint features
including compliance, protection, and secure access into a single, modular
lightweight client.

End-to-end threat visibility and
control by natively integrating endpoint into the Security Fabric architecture.

Advanced threat protection
against exploits and advanced malware, powered by FortiGuard along with
FortiSandbox integration.

Integrated patch management and
vulnerability shielding to harden all endpoints.

Simplified management and policy
enforcement with Enterprise Management Server (EMS) and FortiGate, respectively

Remote
FortiClient Deployment that allows administrators to remotely deploy endpoint
software and perform controlled upgrades.

Centralized
Client Provisioning makes deploying FortiClient configuration to thousands of
clients an effortless task with a click of a button.

Software
Inventory Management provides visibility into installed software applications
and license management to improve security hygiene. You can use inventory
information to detect and remove unnecessary or outdated applications that
might have vulnerabilities to reduce your attack surface. Windows AD
Integration helps sync organizations AD structure into EMS so same OUs can be
used for endpoint management.

Real-time
Endpoint Status always provides current information on endpoint activity &
security events.

Vulnerability
Dashboard helps manage organizations attack surface. All vulnerable endpoints
are easily identified for administrative action.

Next Generation
Endpoint Protection:

Integrated endpoint
protection platform that provides automated next-generation threat protection,
visibility and control of your software and hardware inventory across the
entire security fabric. Identify & remediate vulnerable or compromised
hosts across your attack surface.

• Provides
  Endpoint Visibility & Compliance throughout security fabric
• Prevent
  Known Vulnerabilities from Being Exploited by Attackers
• Automated
  behavior based protection against unknown threats
• Simplified
  Endpoint Management.

Fig : 2

Integrate
Endpoints to Fortinet Security Fabric:

As a key piece of the
Fortinet Security Fabric, FortiClient integrates endpoints into the fabric for
early detection and prevention of advanced threats. Security events including
zero-day malware, botnet detections, and vulnerabilities are reported in
real-time.

The deep real-time
visibility into the network allows administrators to investigate and remotely
quarantine compromised endpoints. Endpoint protection is more than just
antimalware protection, the endpoint compliance and vulnerability detection
features enable simplified enforcement of enterprise.

Fig : 3 

Automated Security Fabric Protection:

Fig : 4

Vulnerability Management:

FortiClient Vulnerability
Management solution helps you detect OS and third-party Application vulnerabilities
in real time across your attack surface.

Fig : 5

Automated Advanced Threat Protection and Detection:

As a next-generation endpoint protection solution, FortiClient helps
connect endpoints to FortiSandbox, which uses behavior-based analysis to automatically
analyze in real-time all files downloaded to FortiClient endpoints. Millions of
FortiClient and FortiSandbox users worldwide share information about known and
unknown, malware with cloud-based FortiGuard. FortiGuard automatically shares
the intelligence with other FortiSandbox units and FortiClient endpoints to
prevent attacks from known and unknown malware. By integrating with
FortiSandbox and cloud-based FortiGuard Global Threat Intelligence, FortiClient
automatically detects and prevents zero-day, advanced malware and known
threats.

Secure Remote Access:

Fig : 6

FortiClient uses SSL and
IPSec VPN to provide secure, reliable access to corporate networks and
applications from virtually any internet-connected remote location. FortiClient
simplifies remote user experience with built-in auto-connect and always-up VPN
features. Two-Factor authentication can also be used to provide an additional
layer of security.

Anti-Exploit:

This behavioral-based detection technology
protects against zero day attacks that target applications with zero-day or
unpatched vulnerabilities.

Protects against zero-day attacks
targeting undiscovered or unpatched application vulnerabilities.

Detects various memory techniques used in
an exploit, such as ROP, Heap Spray, buffer overflow.

File-less Attacks PowerShell & other
scripted attacks.

Shields web browsers, Java/Flash plug-ins,
Microsoft Office applications, and PDF Reader.

Identifies and Blocks exploit kits,
prevents drive-by downloads.

Windows
FortiClient SSL VPN Installation and Setup:

Purpose to support staff who may be
conducting work either remotely or without a direct connection to the college’s
wired network. Whilst the use of a secure virtual private network (VPN) will
provide better assurances against the potential of data leakage than previously
offered, it will not, however, ensure that data is completely safe, as various
forms of malware and key loggers could still be active. The Department of
Information Technology strongly advocates that any device used to undertake
college work must be completely up to date with operating system and
application security patches as well as having an anti-malware product
installed and active. 

If you are working with personal,
confidential or commercially sensitive data, you must ensure that you are using
a secure connection (VPN), especially if you are using an unsecured public
network, such as in a hotel or train station. 

You should not connect to any unsecured
wireless network unless you are sure of its legitimacy.

Google Chrome is the browser that will be
used throughout this guide.

 FortiClient
Installation:

Please enter the following URL into the
address bar of your browser.

Click the red FREE Download button

Fig : 7

The browser will take you to a new page
with the relevant section. At this point, please click of the relevant version
based on the platform you are using i.e. Windows, Mac, iOS, etc. 

Fig : 8

Please save FortiClientInstaller.exe to
your desired location (by default this will be your Downloads folder).

Fig : 9

Once you double click or open the
installer the download will start and you will see a notification similar to
the following screenshot. This download can sometimes proceed slowly, depending
on demand. At this stage, you may be prompted with the User Account Control
screen dependent on your settings. If so, may need to enter your details or
simply click Yes.

Fig : 10

On the following screen, please tick the
box to confirm that you have read the terms and conditions and then click Next.  

Fig : 11

When prompted by the “setup type” screen,
please choose Secure Remote Access only.

Fig : 12

On the following screen, leave the setting
as they are and click Next.

Fig : 13

Click Install and the client will be
installed onto your device.

Fig : 14

Click on the Finish button to complete the
installation.

You should now see the FortiClient green
shield icon in the taskbar to confirm that the software has been installed. You
may need to expand your taskbar by clicking on the red arrow as shown below. Right
click on the green shield icon and then select Open FortiClient Console. You
can also double click on the desktop icon that was created.

Fig : 15

On the following screen click on Configure
VPN.

Fig : 16

Fill out the fields as in the following
screenshot.

Fig : 17

Click Apply to create and save the VPN
Profile and click Close. This will launch the following screen.

Fig : 18

Enter your ID # for the Username and your
network Password and click Connect. In the taskbar you will see a lock icon on
the FortiClient icon and confirm that you are now connected to the VPN
service.  

Fig : 19

To disconnect from the VPN, right click on
the green shield and click Disconnect “VPN”.

Some
of the connectivity issue in the forticlient client:

*  Unable
to logon to the server. your username or password may not be configured
properly for the connection. (-12).

Fig : 20

* I’ve to
reset the password for the user — and are 100% sure that we have a correct
username and password. this issue happened after we have upgraded to 5.4 … I can’t downgrade
for just a single user. my current solution is to reinstall windows 10.

* «Unable
to establish the VPN connection. The VPN server may be unreachable. (-5)»
is obtained in FortiClient trying to connect to the SSL VPN and it is stuck at
40% after upgrading to 5.4.x from 5.2. or earlier.

Fig : 21

This error may occur because the default settings for
encryption have changed in FortiOS v5.4.

1. On the FortiClient (Windows) workstation, go to Internet
Explorer > Options > Advanced.

2. Change the TLS settings to match those settings on the
FortiGate.

For example, if TLS 1.1 and TLS 1.2 are enabled on the
FortiGate, enable them in Internet Explorer as well.

Fig : 22

*
Permission Denied: When the User enters Username and Password for the forticlient if it’s will gives
a Permission denied (-455) error that means user is entering the invalid credentials.

Fig : 23

Thanks,

Keerthi Kumar.

FORTICLIENT SSL VPN PERMISSION DENIED 455 — SYS.FOODIZM.INFO

Web Jul 21, 2021 Forticlient Ssl Vpn Permission Denied 455 Want to Read saving… 3.1 Week 3 Introduction Sep 6, 2021 Alfred Debrun .. Borrow 1 of 5 stars 2 of 5 stars 3 of 5 …
From sys.foodizm.info

FORTICLIENT SSL VPN PERMISSION DENIED 455 — SOL.RARAAVIS.INFO

Web Connect with a partner (third-party Microsoft solution providers) who can setup the OEA architecture in your institution and bring your education use cases to life. Find a Partner. …
From sol.raraavis.info

FORTICLIENT VPN PERMISSION DENIED 455 — ZUT.FOODIZM.INFO

Web Forticlient Vpn Permission Denied 455 1.6 Week 1 References Vow of Seduction by Piper Stone Borrow Error rating book. Refresh and try again. His heart Borrow Forticlient Vpn …
From zut.foodizm.info

FORTINET VPN PERMISSION DENIED 455 — MIS.RARAAVIS.INFO

Web Education is a system where you see changes very slowly, but when you plant a seed, it’s very difficult to roll it back. Before making any action, it’s important to understand what …
From mis.raraavis.info

FORTICLIENT SSL VPN PERMISSION DENIED 455 — LOKET.RARAAVIS.INFO

Web Nov 17, 2021 Forticlient Ssl Vpn Permission Denied 455 — Openly Licensed Educational Resources. In the 2017 National Education Technology Plan, the Department defines …
From loket.raraavis.info

RE: FORTICLIENT PERMISSION DENIED -455 — FORTINET …

Web I had the same error message -455 after updating my LDAP password and found the reason was that I had my old password stored in the FortiClient Console in the Remote Access …
From community.fortinet.com

FORTINET SSLVPN NEW USERS PERMISSION DENIED : …

Web Re-added «SSL VPN Sec Group», still only able to authenticate as the original users. New user still receives permission denied. — Removed ‘vpntest’ from «SSL VPN Logins» AD …
From reddit.com

FORTINET VPN PERMISSION DENIED 455 — SOCOD.RARAAVIS.INFO

Web Borrow. Rate this book. How to buy books on Booknet. Captive Prince (Captive Prince, #1) by. C.S. Pacat (Goodreads Author) Read Alice’s Adventures in Wonderland online. Want …
From socod.raraavis.info

PERMISSION DENIED (-455) ERROR ONLY WHEN USERS HAVE …

Web Permission denied (-455) error only when users have fortitoken? Setup a new VPN connection for a firewall and I’ve noticed through testing that if a user doesn’t have …
From reddit.com

HOW TO FIX FORTICLIENT ERROR -455 — MICROSOFT COMMUNITY

Web Jul 14, 2022 How to fix forticlient error -455 Hi support I encounter this error ‘Your PC does not meet the host checking requirements set by the firewall. Please check that your …
From answers.microsoft.com

FORTIGATE VPN SSL (-455) PERMISSION DENIED ERROR : …

Web Fortigate VPN SSL (-455) permission denied error Setup a Fortigate 60E with the SSL-VPN and it works fine for most users but one user is having a permission denied (-455) …
From reddit.com

RE: IMPOSSIBLE TO CONNECT TO VPN: PERMISSION DENIED

Web I downloaded FortiClient v 5.6.5.1150 and I’m trying to connect to the VPN, but it goes up to 45% and shows the error message «Permission denied (-455)». I’ve read the forums, …
From community.fortinet.com

FORTICLIENT PERMISSION DENIED -455 — FORTINET COMMUNITY

Web Feb 8, 2016 I had the same error message -455 after updating my LDAP password and found the reason was that I had my old password stored in the FortiClient Console in …
From community.fortinet.com

FORTICLIENT SSL VPN PERMISSION DENIED 455 — SEDE.RARAAVIS.INFO

Web Forticlient Ssl Vpn Permission Denied 455 A. Conan Doyle Il.. PRIVACY RegistER NOW! Adoniram Judson Ladd.. Company About us Careers Terms Privacy Interest Based Ads …
From sede.raraavis.info

SSL VPN PORTAL — FORTITOKEN — LDAP — TWO-FACTOR AUTHENTICATION

Web General Date 2018/12/07 Time 11:57:33 Virtual Domain root Log Description SSL VPN login fail Action Action ssl-login-fail Reason sslvpn_login_permission_denied Event Remote …
From reddit.com

FORTINET VPN PERMISSION DENIED 455 — TOGO.FOODIZM.INFO

Web Fortinet Vpn Permission Denied 455 Error rating book. Refresh and try again. A. H. U. Colquhoun .. 404547 Resources Books That Shaped America Library of Congress …
From togo.foodizm.info

SSL-VPN LDAP PERMISSIONS : R/FORTINET — REDDIT

Web • It sounds like you should just create a Restricted Group and then ensure that it’s mapped to the VPN and correct Policy permission. You could also just create additional portals …
From reddit.com

FORTIGATE SSL VPN PERMISSION DENIED 455 — MIS.RARAAVIS.INFO

Web Fortigate Ssl Vpn Permission Denied 455 — Connect with the Library. All ways to connect. 389235. 367632. Broken Kingdom (Royal Hearts Academy #4) … Fortigate Ssl Vpn …
From mis.raraavis.info

TROUBLESHOOTING FORTICLIENT VPN (FAQS) — TEAMDYNAMIX

Web Apr 22, 2020 Once software center opens, look in the list of the Application tab for FortiClient. Open it and click on install. Once the install completes, you will need to …
From usj.teamdynamix.com

FORTINET VPN CLIENT PERMISSION DENIED 455 — MIS.RARAAVIS.INFO

Web Fortinet Vpn Client Permission Denied 455. Download Resource. The Reckoning. The History of The Decline and Fall of the Ro.. Reading Speed Test. Reading Personality …
From mis.raraavis.info

IMPOSSIBLE TO CONNECT TO VPN: PERMISSION DENIED (-455)

Web Feb 26, 2018 I downloaded FortiClient v 5.6.5.1150 and I’m trying to connect to the VPN, but it goes up to 45% and shows the error message «Permission denied (-455)». I’ve …
From community.fortinet.com

Introduction:

             FortiClient extends the power of
FortiGate’s Unified threat management to endpoints on your network. Desktops,
laptops, tablets and smartphones, FortiClient enables every device — local or
remote, stationary or mobile — to integrate with your FortiGate. With no
per-seat license fees, FortiClient takes the headaches out of managing multiple
endpoints so your users and guests can work efficiently anywhere, without
compromising your security. It’s the end-point solution for your FortiGate
network.

The FortiClient
software provides a variety of features, including antivirus, web
filtering, firewall, and parental controls, to individual computers and mobile
devices. It can also be used to connect to a FortiGate using either an SSL or
IPsec VPN.

Forticlient VPN configuration:

Virtual
Private Network (VPN) technology enables remote users to connect to private
computer networks to gain access to their resources in a secure way. For
example, an employee traveling or working from home can use a VPN to securely
access TeraTerm and Network Drives through the Internet.

VPN gateways:

A
gateway is a router that connects the local network to other networks. The
default gateway setting in your computer’s TCP/IP properties specifies the
gateway for your local network.

A
VPN gateway functions as one end of a VPN tunnel. It receives incoming IPsec
packets, decrypts the encapsulated data packets and passes the data packets to
the local network. Also, it encrypts data packets destined for the other end of
the VPN tunnel, encapsulates them, and sends the IPsec packets to the other VPN
gateway. The VPN gateway is a FortiGate unit because the private network behind
it is protected, ensuring the security of the unencrypted VPN data. The gateway
can also be FortiClient software running on a PC since the unencrypted data is
secure on the PC.

The
IP address of a VPN gateway is usually the IP address of the network interface
that connects to the Internet. Optionally, you can define a secondary IP
address for the interface and use that address as the local VPN gateway
address. The benefit of doing this is that your existing setup is not affected
by the VPN settings.

The
following diagram shows a VPN connection between two private networks with
FortiGate units acting as the VPN gateways. This configuration is commonly
referred to as Gateway-to-Gateway IPsec VPN.

VPN
tunnel between two private networks:

Fig : 1

FortiClient
Benefits:

Unified endpoint features
including compliance, protection, and secure access into a single, modular
lightweight client.

End-to-end threat visibility and
control by natively integrating endpoint into the Security Fabric architecture.

Advanced threat protection
against exploits and advanced malware, powered by FortiGuard along with
FortiSandbox integration.

Integrated patch management and
vulnerability shielding to harden all endpoints.

Simplified management and policy
enforcement with Enterprise Management Server (EMS) and FortiGate, respectively

Remote
FortiClient Deployment that allows administrators to remotely deploy endpoint
software and perform controlled upgrades.

Centralized
Client Provisioning makes deploying FortiClient configuration to thousands of
clients an effortless task with a click of a button.

Software
Inventory Management provides visibility into installed software applications
and license management to improve security hygiene. You can use inventory
information to detect and remove unnecessary or outdated applications that
might have vulnerabilities to reduce your attack surface. Windows AD
Integration helps sync organizations AD structure into EMS so same OUs can be
used for endpoint management.

Real-time
Endpoint Status always provides current information on endpoint activity &
security events.

Vulnerability
Dashboard helps manage organizations attack surface. All vulnerable endpoints
are easily identified for administrative action.

Next Generation
Endpoint Protection:

Integrated endpoint
protection platform that provides automated next-generation threat protection,
visibility and control of your software and hardware inventory across the
entire security fabric. Identify & remediate vulnerable or compromised
hosts across your attack surface.

• Provides
  Endpoint Visibility & Compliance throughout security fabric
• Prevent
  Known Vulnerabilities from Being Exploited by Attackers
• Automated
  behavior based protection against unknown threats
• Simplified
  Endpoint Management.

Fig : 2

Integrate
Endpoints to Fortinet Security Fabric:

As a key piece of the
Fortinet Security Fabric, FortiClient integrates endpoints into the fabric for
early detection and prevention of advanced threats. Security events including
zero-day malware, botnet detections, and vulnerabilities are reported in
real-time.

The deep real-time
visibility into the network allows administrators to investigate and remotely
quarantine compromised endpoints. Endpoint protection is more than just
antimalware protection, the endpoint compliance and vulnerability detection
features enable simplified enforcement of enterprise.

Fig : 3 

Automated Security Fabric Protection:

Fig : 4

Vulnerability Management:

FortiClient Vulnerability
Management solution helps you detect OS and third-party Application vulnerabilities
in real time across your attack surface.

Fig : 5

Automated Advanced Threat Protection and Detection:

As a next-generation endpoint protection solution, FortiClient helps
connect endpoints to FortiSandbox, which uses behavior-based analysis to automatically
analyze in real-time all files downloaded to FortiClient endpoints. Millions of
FortiClient and FortiSandbox users worldwide share information about known and
unknown, malware with cloud-based FortiGuard. FortiGuard automatically shares
the intelligence with other FortiSandbox units and FortiClient endpoints to
prevent attacks from known and unknown malware. By integrating with
FortiSandbox and cloud-based FortiGuard Global Threat Intelligence, FortiClient
automatically detects and prevents zero-day, advanced malware and known
threats.

Secure Remote Access:

Fig : 6

FortiClient uses SSL and
IPSec VPN to provide secure, reliable access to corporate networks and
applications from virtually any internet-connected remote location. FortiClient
simplifies remote user experience with built-in auto-connect and always-up VPN
features. Two-Factor authentication can also be used to provide an additional
layer of security.

Anti-Exploit:

This behavioral-based detection technology
protects against zero day attacks that target applications with zero-day or
unpatched vulnerabilities.

Protects against zero-day attacks
targeting undiscovered or unpatched application vulnerabilities.

Detects various memory techniques used in
an exploit, such as ROP, Heap Spray, buffer overflow.

File-less Attacks PowerShell & other
scripted attacks.

Shields web browsers, Java/Flash plug-ins,
Microsoft Office applications, and PDF Reader.

Identifies and Blocks exploit kits,
prevents drive-by downloads.

Windows
FortiClient SSL VPN Installation and Setup:

Purpose to support staff who may be
conducting work either remotely or without a direct connection to the college’s
wired network. Whilst the use of a secure virtual private network (VPN) will
provide better assurances against the potential of data leakage than previously
offered, it will not, however, ensure that data is completely safe, as various
forms of malware and key loggers could still be active. The Department of
Information Technology strongly advocates that any device used to undertake
college work must be completely up to date with operating system and
application security patches as well as having an anti-malware product
installed and active. 

If you are working with personal,
confidential or commercially sensitive data, you must ensure that you are using
a secure connection (VPN), especially if you are using an unsecured public
network, such as in a hotel or train station. 

You should not connect to any unsecured
wireless network unless you are sure of its legitimacy.

Google Chrome is the browser that will be
used throughout this guide.

 FortiClient
Installation:

Please enter the following URL into the
address bar of your browser.

Click the red FREE Download button

Fig : 7

The browser will take you to a new page
with the relevant section. At this point, please click of the relevant version
based on the platform you are using i.e. Windows, Mac, iOS, etc. 

Fig : 8

Please save FortiClientInstaller.exe to
your desired location (by default this will be your Downloads folder).

Fig : 9

Once you double click or open the
installer the download will start and you will see a notification similar to
the following screenshot. This download can sometimes proceed slowly, depending
on demand. At this stage, you may be prompted with the User Account Control
screen dependent on your settings. If so, may need to enter your details or
simply click Yes.

Fig : 10

On the following screen, please tick the
box to confirm that you have read the terms and conditions and then click Next.  

Fig : 11

When prompted by the “setup type” screen,
please choose Secure Remote Access only.

Fig : 12

On the following screen, leave the setting
as they are and click Next.

Fig : 13

Click Install and the client will be
installed onto your device.

Fig : 14

Click on the Finish button to complete the
installation.

You should now see the FortiClient green
shield icon in the taskbar to confirm that the software has been installed. You
may need to expand your taskbar by clicking on the red arrow as shown below. Right
click on the green shield icon and then select Open FortiClient Console. You
can also double click on the desktop icon that was created.

Fig : 15

On the following screen click on Configure
VPN.

Fig : 16

Fill out the fields as in the following
screenshot.

Fig : 17

Click Apply to create and save the VPN
Profile and click Close. This will launch the following screen.

Fig : 18

Enter your ID # for the Username and your
network Password and click Connect. In the taskbar you will see a lock icon on
the FortiClient icon and confirm that you are now connected to the VPN
service.  

Fig : 19

To disconnect from the VPN, right click on
the green shield and click Disconnect “VPN”.

Some
of the connectivity issue in the forticlient client:

*  Unable
to logon to the server. your username or password may not be configured
properly for the connection. (-12).

Fig : 20

* I’ve to
reset the password for the user — and are 100% sure that we have a correct
username and password. this issue happened after we have upgraded to 5.4 … I can’t downgrade
for just a single user. my current solution is to reinstall windows 10.

* «Unable
to establish the VPN connection. The VPN server may be unreachable. (-5)»
is obtained in FortiClient trying to connect to the SSL VPN and it is stuck at
40% after upgrading to 5.4.x from 5.2. or earlier.

Fig : 21

This error may occur because the default settings for
encryption have changed in FortiOS v5.4.

1. On the FortiClient (Windows) workstation, go to Internet
Explorer > Options > Advanced.

2. Change the TLS settings to match those settings on the
FortiGate.

For example, if TLS 1.1 and TLS 1.2 are enabled on the
FortiGate, enable them in Internet Explorer as well.

Fig : 22

*
Permission Denied: When the User enters Username and Password for the forticlient if it’s will gives
a Permission denied (-455) error that means user is entering the invalid credentials.

Fig : 23

Thanks,

Keerthi Kumar.