Fortigate loopback interface11/23/2023 ![]() Technical Tip : How to control/change the FortiGate source IP for self-originating traffic : SNMP. However, it may still be desirable to gain information on the quality of this interface, either through sending ICMP pings to the interface or through something like a bit error test. The interface will be unavailable for regular data traffic. Technical Note: Configuring BGP on a FortiGate with single-homed eBGP peering, iBGP peering, access-. The interface may be looped back in hardware or software. ![]() However, I cannot figure out how to route the LAN subnets across the tunnel. The tunnel is up and I can ping the loopback addresses from both sides (after exec ping-options source ).See more details about BGP peering with a loopback interface in the related article at the end of this page : "Technical Note: Configuring BGP on a FortiGate with single-homed eBGP peering, iBGP peering, access-list and OSPF" I have set up an IPsec tunnel (using the wizard) that terminates on some loopback interfaces that were created just for that purpose. The Management station has only single IP addresses for FGT1 and FGT2, that can be accessed from any interface, and routed by RTR2 (routing and firewall policies must permit). Hair-pinning, also known as NAT loopback, is the technique where a machine accesses another machine on the LAN via an external network.Once in there, select the drop down next to the VLAN selection. FGT2 and FGT1 can establish an iBGP peering to their respective loopback interface via Port4 or Port5 (routing and firewall policies must permit). Go to Network, Interfaces and select Create New.The loopback interface is seen from the routing table as connected interface :Ĭ 10.0.0.2/32 is directly connected, loopback This article describes how to configure FortiGate with IPSec VPN implanted on or bounded to the loopback interface. Note 2 : For blackhole static route, use the blackhole route type instead of the loopback interface.īGP peering and Management access scenario : Note 1 : Dynamic routing protocols can be enabled on loopback interfaces Good practice for OSPF : setting the OSPF router ID the same as loopback IP address makes it easier for troubleshooting OSPF and remember the management IP addresses (i.e.Some scenario where a loopback interface can be used: Note that using loopback interfaces requires the configuration of appropriate firewall policies to allow traffic to and from this (those) interface(s) Multiple loopback interfaces can be configured in either non-VDOM mode or in each VDOM. It allows connections to the FortiGate's loopback IP address without depending on one specific external port, and it is therefore possible to access it through several physical or VLAN interfaces (redundancy). ![]() The advantage of a interface it that this logical interface is always up (no physical link dependency) and the attached subnets always present in the routing table. This article describes some scenario where a loopback interface can be used.
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