MikroTik IPsec client Fortigate ‘Received ESP packet with unknown SPI.’ Valuable Tech Notes
Received Esp Packet With Unknown Spi. Web problem is that that fortigate receives incoming packets from opnsense but reject it as it comes from unknown. Web go to network > ipsec tunnels > general tab and disable ' replay protection ' to resolve the issue.
Web the meaning of the message is that one side of the ipsec tunnel received a packet with an invalid spi. These invalid attempts are automatically blocked. Web sometimes there are malicious attempts using crafted invalid esp packets. Web go to network > ipsec tunnels > general tab and disable ' replay protection ' to resolve the issue. Web problem is that that fortigate receives incoming packets from opnsense but reject it as it comes from unknown.
Web go to network > ipsec tunnels > general tab and disable ' replay protection ' to resolve the issue. These invalid attempts are automatically blocked. Web the meaning of the message is that one side of the ipsec tunnel received a packet with an invalid spi. Web problem is that that fortigate receives incoming packets from opnsense but reject it as it comes from unknown. Web sometimes there are malicious attempts using crafted invalid esp packets. Web go to network > ipsec tunnels > general tab and disable ' replay protection ' to resolve the issue.
