How do I troubleshoot IPSec VPN connectivity issues FortiGate?

Posted on by Mary Andersen

How do I troubleshoot IPSec VPN connectivity issues FortiGate?

  1. Check your equipment and cables.
  2. Check the FortiGate LEDs.
  3. Ping the FortiGate.
  4. Check the FortiGate interface configurations (NAT/Route mode only)
  5. Verify the security policy configuration.
  6. Verify the static routing configuration (NAT/Route mode only)

What is IPSec DPD failure?

The IPSEC tunnel may fail when excessive Dead Peer Detection (DPD) messages are exchanged. This issue occurs when the following condition is met: Excessive DPD messages are exchanged.

How do I enable IPSec VPN FortiGate?

To configure the IPSec VPN tunnels on a FortiGate 60D firewall:

  1. Configure the VPN Parameters. Define the VPN parameters for the primary and backup VPN tunnels.
  2. Define the IPv4 Policies. Define the IPv4 policies to allow access to the newly configured tunnels.
  3. Establish the Static Routes.
  4. Define the Policy Routes.

How do I check my IPsec tunnel log in FortiGate?

To view the list of dialup tunnels go to Monitor > IPsec Monitor. If you take down an active tunnel while a dialup client such as FortiClient is still connected, FortiClient will continue to show the tunnel connected and idle. The dialup client must disconnect before another tunnel can be initiated.

Where is IPsec pre shared key FortiGate?

IPsec VPN authenticating a remote FortiGate peer with a pre-…

  1. For Remote Device, select IP Address.
  2. For the IP address, enter 172.16. 202.1.
  3. For Outgoing interface, enter port1.
  4. For Authentication Method, select Pre-shared Key.
  5. In the Pre-shared Key field, enter sample as the key.
  6. Click Next.

What is IPsec esp error?

IPSec VPN. Solution. The ESP packet invalid error is due to an encryption key mismatch after a VPN tunnel has been established. When an IPSec VPN tunnel is up, but traffic is not able to pass through the tunnel, Wireshark (or an equivalent program) can be used to determine whether there is an encryption mismatch.

What is DPD failure in FortiGate?

DPD is a ike status check depending on how you have it configured ( idle or on-demand )based on if ESP data grams are not being sent from the peer. The DPD down is simple put that the peer has not responded is marked down and ike/ipsec SA are cleared.

How do I get pre-shared key for VPN FortiGate?

What is IPSec pre-shared key?

A pre-shared key (PSK) or shared secret is a string of text a VPN (virtual private network) or other service expects to get before it receives any other credentials (such as a username and password).

How do I capture packets in FortiGate?

– Go to Network -> Packet Capture and create a new filter. Substitute the management-IP with the correct IP to access the FortiGate. – Below shows the Packet Capture interface: The option to capture the packet based on interface and filter by hosts, ports or VLANs will be proposed.

How does DPD work VPN?

Dead Peer Detection (DPD) is the method to detect the aliveness of an IPsec connection. During IPsec tunnel creation, VPN peers will negotiate to decide whether to use DPD or not. When DPD is in use, the router will send DPD packet R_U_THERE to the VPN peer and wait for peer’s ACK.

How do I check my IPSec?

Specifying a Ping Source in the GUI

  1. Navigate to Diagnostics > Ping.
  2. Fill in the settings as follows: Host. Enter an IP address which is on the remote router within the remote subnet listed for the tunnel phase 2 (e.g. 10.5. 0.1 ) IP Protocol. The address family of the host being used (e.g. IPv4 for 10.5. 0.1 )
  3. Click Ping.

What version of Fortinet is Fortinet going to fix this bug?

According to Fortinet Support this bug should be fixed in 6.4.9, which most likely should come out in the beggining of February. Until then we hope to find away around this issue without downgrading back to 6.4.5.

What IPsec parameters should I check when testing FortiGate?

Check the following IPsec parameters: The mode setting for ID protection (main or aggressive) on both VPN peers must be identical. The authentication method (preshared keys or certificates) used by the client must be supported on the FortiGate unit and configured properly.

How do I fix the Fortinet hub connection problem?

The workaround is suppose to be a router restart at the Hub, but it might occure again with random tunnels. According to Fortinet Support this bug should be fixed in 6.4.9, which most likely should come out in the beggining of February.

How do I know if my forticlient is compatible with FortiGate?

If you are using FortiClient, ensure that your version is compatible with the FortiGate firmware by reading the FortiOS Release Notes. If you are using Perfect Forward Secrecy (PFS), ensure that it is used on both peers.

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