@aprasad11 configure a control plane ACL on the ASA to restrict udp/500, udp/4500 (if NAT) and ESP traffic.
Example configuration for an ASA - https://www.cisco.com/c/en/us/support/docs/security/secure-firewall-threat-defense/221457-configure-contro...
@ipo.peniel_rg the NAT/Firewall configuration need to be performed on the Fortigate firewall, you'd probably be better asking in the Fortinet forums rather than the Cisco community.
@ipo.peniel_rg configure a static IP address on the router instead of DHCP, configure a static NAT on the firewall translating the public IP address to the private static IP address of the router. Configure the firewall rules (from outside to inside)...
@ipo.peniel_rg there could be a numbe of reasons, without seeing your configuration we can only guess.
- Check the firewall ACL to confirm the traffic is allowed.
- If NAT is configured confirm it is working correctly.
- If NAT is configured check th...