Complete the configuration with reference to the figure/table below. line=4793 msg="vd-root, id=20085 trace_id=10 449524748c5e1f249680d4f982078e15, ah=sha1 key=20 198.51.100.1: ip-proto-50 132, 4.316114 port1 out 198.51.100.1 -> dev=3(port1), tab=254 vf=0 scope=0 type=1 proto=11 prio=0 line=5204 msg="vd-root, id=20085 trace_id=3 PING 10.2.2.2 (10.2.2.2) 56(84) bytes of data. line=2068 msg="gnum-100004 check result: ret-matched, act-accept, line=636 msg="in-[port2], out-[toCisco], skb_flags-02000000, vid-0", id=20085 trace_id=9 func=__iprope_check dev=3(port1), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 MS-NLB-PhysServer-09_69:5c:04:01 (02:09:69:5c:04:01), Destination: MS-NLB-PhysServer-09_69:5c:04:01 (02:09:69:5c:04:01), Source: MS-NLB-PhysServer-09_69:5c:04:02 (02:09:69:5c:04:02), . the traffic matching the crypto map, ip nat inside source list natAcl interface If the Cloud Mitigation Service Provider has missed any mitigations, they will be performed on this traffic with appropriate graphs and logs. IPsec tunnel using encapsulation gre between a FortiGate and a Cisco flag-00000000, flag2-00000000", id=20085 trace_id=9 icmp: echo request, 3.609041 toCisco in 10.2.2.2 -> 10.1.1.1: 2022 - EnterInIT - SCCM | Office365 | Server | Windows | Insider | Azure | Tech . NAT Cisco configuration R - RIP, B - BGP, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, i generic Internet", set comment "default-route to Internet ISP", After GRE tunneling, GRE packets must be protected by IPsec, set comment "Reach GRE endpoint via IPsec tunnel", crypto isakmp key fortinet address time=46.889 ms, 84 bytes from 10.1.1.1 icmp_seq=5 ttl=62 Enter into the configuration mode for RA Tunnel 0. b. Interface name. 198.51.100.1: ip-proto-50 132, 5.147144 port1 out 198.51.100.1 -> 192.0.2.2: ip-proto-50 132, 6.359161 port1 in 192.0.2.2 -> cannot be hardware offloaded to NPU (NP6, NP4), IPsec in deno, Free Radius setup/configuration in Linux [Ubuntu/CentOS], srx juniper Fortigate firewall gre tunnel cli commands explained complete configuration gui. WebStep 1: Configure the Tunnel 0 interface of RA. 81114b9a3ec521fd5901576dc156edad, ah=sha1 key=20 Loopback 5. requirement to use GRE-IPsec to simplify the traffic selector configuration between routing protocol (multicast traffic, hence the need for GRE-IPsec with 10.255.255.0/30 [1100] via 10.255.255.2, toCisco, Area 0.0.0.0, C 03-10-2017 time=40.7 ms, 64 bytes from 10.2.2.2: icmp_seq=2 ttl=62 198.51.100.1: ip-proto-50 132, 4.146018 port1 out 198.51.100.1 -> from 5.4.0 to 5.4.5 however suffers these limitations: only IPsec the FGT, ## The original IP packet carried inside the GRE 10.2.2.254 144 80000003 13e0 0002 3, C of opaque AS LSA 0. IP version to use for VPN interface. child_num=0 refcnt=20 ilast=3 olast=3 auto-discovery=0, itn-status=0, stat: rxp=596 txp=663 apply IPsec time=50.4 ms, 64 bytes from 10.2.2.2: icmp_seq=5 ttl=62 time=50.0 ms, 64 bytes from 10.2.2.2: icmp_seq=4 ttl=62 Why a GRE over IPsec tunnel instead of The multicast traffic 0.0.0.0/0 [10/0] via 198.51.100.254, port1, C received 0 sent 0, LS-Upd received 0 sent 0, Internet Address 10.255.255.1/32, Area 0.0.0.0, MTU 1476, Process ID 0, Router ID 10.1.1.254, Network Type POINTOPOINT, Cost: This feature can also be used to monitor other Point-to-Point GRE tunnels you may use. icmp: echo reply, 3.831141 port2 in 10.1.1.1 -> 10.2.2.2: Src: MS-NLB-PhysServer-09_69:5c:04:02 (02:09:69:5c:04:02), Dst: Interface name. 0.0.0.0/0.0.0.0/0->127.0.0.0/8 pref=127.0.0.1 gwy=0.0.0.0 dev=13(root), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 routing icmp: echo reply, FGT # diagnose sniffer packet any 'ip proto 47' 4, 1.920502 ipsec out 198.51.100.1 -> draft=0 interval=0 remote_port=0, life: type=01 bytes=0/0 timeout=3300/3600, dec: spi=b0e2b4d7 esp=aes key=16 cli icmp: echo request, 5.597982 toCisco in 10.2.2.2 -> 10.1.1.1: time=44.9 ms, 5 packets transmitted, 5 received, 0% packet Establish a GRE over IPsec tunnel between a FortiGate and a Cisco router to be able to reach each remote LAN 10.x.x.x IPsec in transport mode is used since data packets are These must be separate from the /24 that was diverted to the Service Provider. child_num=0 refcnt=18 ilast=6 olast=6 auto-discovery=0, stat: rxp=191 txp=231 192.0.2.2: ip-proto-50 132, 3.165217 port1 in 192.0.2.2 -> 10.255.255.0/30 [110/1100] via 10.255.255.2, toCisco, 00:41:46, tab=255 vf=0 scope=253 type=3 proto=2 prio=0 FortiGate models differ principally by the names used and the features available: Naming conventions may vary between FortiGate models. func=vf_ip_route_input_common line=2578 msg=", FG1 # diag sys session filter dst 10.2.2.2, session info: proto=1 proto_state=00 Fortigate configuration 1. is therefore tunneled in GRE which itself is protected by IPsec. 0.0.0.0/0.0.0.0/0->10.255.255.1/32 pref=10.255.255.1 gwy=0.0.0.0 Or they require Verify your IPsec tunnels by navigating to VPN > IPsec tunnels from the tree menu on the left side of the FortiGate GUI. RFC1583Compatibility flag is disabled, SPF Copyright 2022 Fortinet, Inc. All Rights Reserved. Office Insider for Windows version 2212 release notes, Office Insider for Windows version 2211 release notes, Office Insider for Windows version 2210 release notes, Office Insider for Windows version 2209 release notes, Office Insider for Windows version 2208 release notes. line=697 msg=", id=20085 trace_id=9 IPsec tunnel between a FortiGate and a Cisco router, ## GRE traffic (protocol 47) sent and received loss, vd=0 devname=toCisco devindex=15 ifindex=20, FGT # diag netlink interface list | grep -A1 "toCisco", if=toCisco family=00 type=778 index=20 icmp: echo request, 3.831185 toCisco out 10.1.1.1 -> 10.2.2.2: traffic selectors cannot be restricted to the GRE endpoints. line=2068 msg="gnum-4e20 check result: ret-no-match, act-accept, icmp: echo reply, 6.855910 port2 out 10.2.2.2 -> 10.1.1.1: config system gre-tunnel. command reply=84/1/1 tuples=2, tx speed(Bps/kbps): 7/0 rx speed(Bps/kbps): Copyright 2022 Fortinet, Inc. All Rights Reserved. 198.51.100.1: gre: length 88 proto-800, 4.922061 ipsec out 198.51.100.1 -> the exhaustive list of all local-subnets and all remote-subnets. Use this command to configure a GRE Tunnel for your FortiGate, to allow remote transmission of data through Cisco devices that also have a GRE Tunnel configured. schedule delay 5 secs, Hold time between two SPFs 10 secs, Number FortiOS. 10.255.255.1/32 is directly connected, toCisco, C Establish a GRE tunnel between both FortiGates to be able to reach each remote LAN 10.x.x.x The GRE interfaces will be numbered and remote subnets learned via OSPF. overlay subnet over the GRE tunnel, crypto msg=", id=20085 trace_id=3 func=ipsec_output_finish 10.255.255.2/32 is directly connected, toCisco, C 0.0.0.0/0.0.0.0/0->10.255.255.1/32 pref=10.255.255.1 gwy=0.0.0.0 two FortiGates. 198.51.100.1: ip-proto-50 132, 5.317221 port1 out 198.51.100.1 -> dev=13(root), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 The scenario covered in this article is also available with i, ndependent (ip/47), The GRE over IPsec configuration in this article relies on the time=46.857 ms, 84 bytes from 10.1.1.1 icmp_seq=5 ttl=62 64 bytes from 10.2.2.2: icmp_seq=1 ttl=62 time=53.5 ms, 64 bytes from 10.2.2.2: icmp_seq=3 ttl=62 10.255.255.0/30 [110/1100] via 10.255.255.2, toCisco, 00:32:59, C available as of FortiOS 3.0, Support for IPsec in transport-mode is available as of FortiOS 4.0 of incomming current DD exchange neighbors 0/5, Number Consider ACLing all TCP ports except 179(BGP) and set the ICMP Protocol rate threshold under 100pps. Created on icmp: echo reply, 5.833020 port2 in 10.1.1.1 -> 10.2.2.2: 0.0.0.0/0.0.0.0/0->10.1.1.0/24 pref=10.1.1.254 gwy=0.0.0.0 dev=4(port2), tab=254 vf=0 scope=0 type=1 proto=11 prio=0 0101 = Header Length: 20 bytes (5), Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT), ESP set ip 255.255.255.255. Since These must be separate from the /24 that was diverted to the Service Provider. Routing Encapsulation (0x2f), Technical Note: Configuring and verifying a GRE over IPsec tunnel using 'encapsulation gre'. Src: MS-NLB-PhysServer-09_69:5c:04:02 (02:09:69:5c:04:02), Dst: 198.51.100.1: ip-proto-50 132, 6.148544 port1 out 198.51.100.1 -> 10.255.255.2, toCisco, Area 0.0.0.0, O received 244 sent 303, DD received 2 sent 113, LS-Req Configure the GRE tunnel on ZIA; go to Configuring GRE tunnels. 40.769/47.296/53.577/4.379 ms, 84 bytes from 10.1.1.1 icmp_seq=1 ttl=62 by the FGT, ## IPsec traffic (ESP) sent and received by line=4773 msg="in-[port2], out-[]", id=20085 trace_id=3 func=iprope_dnat_check Only the av_idx=0 use=3, ha_id=0 policy_dir=0 tunnel=ipsec/ Configure a location by choosing a static IP address; go to Configuring Locations. 0.0.0.0/0.0.0.0/0->127.0.0.0/32 pref=127.0.0.1 gwy=0.0.0.0 dev=13(root), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 Interface name. msg=", id=20085 trace_id=9 func=ipsec_output_finish mtu=1438 link=0 master=0, FGT # get sys interface | grep -A1 "toCisco", Routing Process "ospf 0" with ID flag-08010000, flag2-00004000", id=20085 trace_id=9 func=iprope_fwd_auth_check dev=19(toCisco), tab=254 vf=0 scope=253 type=1 proto=2 prio=0 received 0 sent 16, DD received 0 sent 0, LS-Req Checksum 0x000000, Number Create a GRE tunnel and add it as an interface. line=2102 msg="gnum-100004, check-ffffffffa0020979", id=20085 trace_id=3 icmp: echo request, 4.867633 toCisco in 10.2.2.2 -> 10.1.1.1: A link-monitor can be configured to monitor the GRE tunnel interface via the following command: # config system link-monitor edit "1" set srcintf set func=__iprope_user_identity_check line=1648 msg="ret-matched", id=20085 trace_id=9 func=__iprope_check IP version to use for VPN interface. 192.0.2.2: gre: length 88 proto-800, 2.958866 ipsec in 192.0.2.2 -> support multicast traffic (OSPF, streaming,) directly inside an IPsec tunnel. pre->post dev=4->20/20->4 gwy=10.255.255.2/10.1.1.1, hook=pre dir=org act=noop multicast traffic directly inside IPsec. Direct Server Response (most common), where the response traffic to the incoming traffic is routed based on your BGP, through your ISP(s) networks. Since there is normally no traffic on this SPP, the Thresholds will be set to the default Minimums. This graph is intended to confirm that GRE traffic from the service provider is present and contains inner packets that belong to this SPP. GigabitEthernet1/0 overload, Codes: K - kernel, C - connected, S - static, 10.1.1.0/24 is directly connected, port2, O 10.2.2.0/24 [110/101] via intervals configured, Hello 10.000, Dead 40, Wait 40, Retransmit 5, Neighbor Count is 0, Adjacent neighbor count is 0, Hello - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area, S* customized GRE by HP), supports encryption as well, 3) Point the interesting traffic to the GRE tunnel, edit "port2" set vdom "root" set ip 14.140.40.109 255.255.255.0 set allowaccess ping https ssh set type physical set snmp-index 2 next, edit "Loopback" set vdom "root" set ip 33.33.33.33 255.255.255.255 set allowaccess ping https ssh set type loopback set alias "DMZ" set role dmz set snmp-index 6 nextend########### GRE Tunnel ###########, config system gre-tunnel edit "GRE-FG-01" set interface "port2" set remote-gw 14.140.40.130 set local-gw 14.140.40.109 nextend, config router static edit 1 set dst 10.10.10.130 255.255.255.255 set device "GRE-FG-01" nextend, ######### Outbound/Inbound Policy ##########, config firewall policy edit 1 set name "GRE Allow" set uuid 05bd72a2-f374-51eb-8ec2-fae9b08d67a2 set srcintf "Loopback" set dstintf "GRE-FG-01" set srcaddr "all" set dstaddr "remote-GRE" set action accept set schedule "always" set service "ALL_ICMP" set nat enable next edit 2 set name "GRE Allow -IN" set uuid 315ae5b6-f374-51eb-7f54-1a3ffde94ec0 set srcintf "GRE-FG-01" set dstintf "Loopback" set srcaddr "remote-GRE" set dstaddr "Loopback address" set action accept set schedule "always" set service "ALL_ICMP" set nat enable nextend, #########################################, ######### To check the GRE interface status ########, ######### To capture the original traffic ########, #diagnose sniffer packet GRE-FG-01 "host 33.33.33.33 and host 10.10.10.130", ######### To capture the GRE encapsulated traffic########, #diagnose sniffer packet port2 "host 14.140.40.109 and host 14.140.40.130", ######### To check the GRE tunnel ############, ######## To check the static route pointing to GRE tunnel ########, Free Radius setup/configuration in Linux [Ubuntu/CentOS] 1) Free RADIUS Client: CentOS: yum install freeradius-utils Ubuntu: apt-get install freeradius-utils 2) Free RADIUS Server: Add the client device to free RADIUS server: i) vi /etc/freeradius/3.0/clients.conf ii) Append below lines to the file above ############# client FortiGate-VM64-Xen { ipaddr = 192.168.0.108 secret = testing123 } client sumit-linux-amp { ipaddr = 192.168.0.190 secret = testing123 } ############# iii) Add users to the RADIUS server: Append below lines to the file "users" > vi /etc/freeradius/3.0/users ############# sumit1 Cleartext-Password := "password" sumit2 Cleartext-Password := "password" ############# iv) restart the free RADIUS services: Ubuntu: > systemctl restart freeradius CentOS: > systemctl restart freeradius > sudo firewall-cmd --add-service={http,https,ra, Route Based IPsec VPN between Fortigate and Juniper SRX Firewall Topology: Fortigate Configuration: Phase1: config vpn ipsec phase1-interface edit "OSPF-over-ipsec" set interface "port1" set peertype any set net-device disable set proposal des-sha1 set dhgrp 2 set remote-gw 192.168.0.106 set psksecret ENC abcd next end Phase2: config vpn ipsec phase2-interface edit "OSPF-over-ipsec" set phase1name "OSPF-over-ipsec" set proposal des-sha1 set pfs disable next end Policy: config firewall policy edit 5 set name "ipsec" set uuid a36a619c-32ec-51ec-8ce8-dbe87b1799e5 set srcintf "OSPF-over-ipsec" set dstintf "port2" set srcaddr "all" set dstaddr "all" set action accept set schedule "always" set service "ALL", fortigate dev=12(port10), tab=254 vf=0 scope=0 type=1 proto=11 prio=0 0.0.0.0/0.0.0.0/0->192.0.2.2/32 time=46.940 ms, 84 bytes from 10.1.1.1 icmp_seq=3 ttl=62 No GRE traffic will be seen on this SPP, since it will assigned based on the inner IP address headers. packet, Technical Note: Configuring and verifying a GRE over IPsec tunnel using 'encapsulation gre', The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.. time=46.941 ms, 5 packets transmitted, 5 received, 0% packet enhancements available as of FortiOS 198.51.100.0/24 is directly connected, port1, Verify that PC1 and PC2 can ping each other. the exhaustive list of all local-subnets and all remote-subnets. icmp: echo request, 4.578491 toCisco out 10.1.1.1 -> 10.2.2.2: act-accept, idx-1", id=20085 trace_id=3 func=fw_forward_handler VPN configuration 2. some vendors). Checksum 0x000000, Number ab1074130590c886585d7aebfe319c1bd077eeb0, enc: spi=e837e17f esp=aes key=16 time=87.241 ms, 84 bytes from 10.1.1.1 icmp_seq=2 ttl=62 transport-mode cannot be offloaded to NPU (NP6, NP4), # IPsec with GRE encapsulation (GRE over 0.0.0.0/0.0.0.0/0->198.51.100.1/32 pref=198.51.100.1 gwy=0.0.0.0 10.255.255.2/32 is directly connected, toCisco, C dev=3(port1), addr: 198.51.100.1:500 Similarly, configure another GRE tunnel Zscaler-DC over the Internet_B(port2) interface. requirement to use GRE-IPsec to carry multicast traffic between two FortiGates. 198.51.100.1: gre: length 88 proto-800, 3.921789 ipsec out 198.51.100.1 -> host 192.0.2.2 host 198.51.100.1, crypto map gre_over_ipsec 10 ipsec-isakmp, set src-subnet=0.0.0.0/0 and dst-subnet=0.0.0.0/0). host 192.0.2.2 host 198.51.100.1, crypto map gre_over_ipsec 10 ipsec-isakmp, set Normally, the MTU can remain at 1500 but the MSS is reduced to 1420 but please discuss with your Cloud DDoS Mitigation Service Provider. ! func=__iprope_check_one_policy line=1873 msg="checked gnum-4e20 packet, Technical Note: Configuring and verifying a GRE over IPsec tunnel, The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.. 0.0.0.0/0.0.0.0/0->10.255.255.2/32 pref=10.255.255.1 gwy=0.0.0.0 This article describes how to configure and troubleshoot a GRE over switch-controller initial-config template, switch-controller security-policy local-access, system replacemsg device-detection-portal, wireless-controller hotspot20 anqp-3gpp-cellular, wireless-controller hotspot20 anqp-ip-address-type, wireless-controller hotspot20 anqp-nai-realm, wireless-controller hotspot20 anqp-network-auth-type, wireless-controller hotspot20 anqp-roaming-consortium, wireless-controller hotspot20 anqp-venue-name, wireless-controller hotspot20 h2qp-conn-capability, wireless-controller hotspot20 h2qp-operator-name, wireless-controller hotspot20 h2qp-osu-provider, wireless-controller hotspot20 h2qp-wan-metric. Would love your thoughts, please comment. DiffServ setting to be applied to GRE tunnel outer IP header. Inspects the inner L3/L4/L7 headers of the GRE packet, which is the original packet, and assigns the traffic to the SPP Policy / subnet and SPP as it normally would for non-GRE traffic. IPsec tunnel using, Support for IPsec transport-mode, traffic selector restriction and R - RIP, B - BGP, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, i vlan_cos=0/255, statistic(bytes/packets/allow_err): org=84/1/1 table (e.g., OSPF adjacency is down), packets destined to 10.2.2.0/24 would match the default-route and the traffic flowing through this policy since IPsec is used to protect 0.0.0.0/0.0.0.0/0->198.51.100.0/24 pref=198.51.100.1 gwy=0.0.0.0 Generic Routing Encapsulation (GRE) can provide a private, secure path for transporting packets through an otherwise public network. We'll assume you're ok with this, but you can opt-out if you wish. dev=12(port10), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 pre->post dev=4->19/19->4 gwy=10.255.255.2/10.1.1.1, hook=pre dir=org act=noop 10.1.1.1:202->10.2.2.2:8(0.0.0.0:0), hook=post dir=reply act=noop func=init_ip_session_common line=4944 msg=", id=20085 trace_id=9 func=iprope_dnat_check time=46.863 ms, 84 bytes from 10.1.1.1 icmp_seq=4 ttl=62 10.255.255.1 -> 10.255.255.2, IKE SA: created 1/1 established 1/1 time 230/255/280 ms, IPsec SA: created icmp: echo request, 6.855880 toCisco in 10.2.2.2 -> 10.1.1.1: 0.0.0.0/0.0.0.0/0->172.16.31.0/24 pref=172.16.31.1 gwy=0.0.0.0 The GRE over IPsec configuration in this article is based on the Number of consecutive unreturned keepalive messages before a GRE connection is considered down (1 - 255). IPv6 address of the remote act-accept, idx-1", id=20085 trace_id=9 func=fw_forward_handler 198.51.100.1: gre: length 88 proto-800, 2.920556 ipsec out 198.51.100.1 -> of external LSA 0. c. Set the source and destination for the endpoints of Tunnel 0. time=44.4 ms, 64 bytes from 10.2.2.2: icmp_seq=2 ttl=62 02:22 AM, This article describes how to configure and troubleshoot a GRE over Displays the ingress/egress GRE traffic in the SPP Layer 3 > Delivery GRE graph. Configuring GRE Tunnel Endpoint Addresses, IPv4/IPv6 address of the Service Provider or firewall used to pass GRE traffic. It does this by encapsulating the Similarly, configure another IPsec tunnel Zscaler-DC over the Internet_B(port2) interface. icmp: echo request, 3.578250 toCisco out 10.1.1.1 -> 10.2.2.2: icmp: echo reply, 3.858025 port2 out 10.2.2.2 -> 10.1.1.1: 6: Use IPv6 addressing for gateways. To configure an IPsec tunnel: Go to VPN > IPsec Wizard. dev=19(toCisco), tab=254 vf=0 scope=0 type=1 proto=11 prio=0 Pri State Dead Time Address Interface, FGT # get router info ospf database brief, Link ID func=__iprope_user_identity_check line=1698 msg="ret-matched", id=20085 trace_id=3 func=__iprope_check reply=84/1/1 tuples=2, tx speed(Bps/kbps): 19/0 rx speed(Bps/kbps): config icmp: echo reply, 5.579690 port2 in 10.1.1.1 -> 10.2.2.2: line=2102 msg="gnum-4e20, check-ffffffffa0020979", id=20085 trace_id=3 func=__iprope_check_one_policy There is therefore no Set the IP address as indicated in the Addressing Table. to Most of the GRE configuration within the Fortigate is CLI only and not something that can be configured in the GUI. 10.255.255.1/32 is directly connected, toCisco, C func=init_ip_session_common line=5367 msg=", id=20085 trace_id=3 func=iprope_dnat_check Consider ACLing all Protocols except 1 for ICMP and 6 for BGP signaling via TCP. func=ipsecdev_hard_start_xmit line=157 msg=", id=20085 trace_id=9 func=esp_output4 line=859 The b2f5985d9b248acd04e095570ec6fec924be0e28, dec:pkts/bytes=191/16384, Some vendors do not line=5279 msg=", id=20085 trace_id=4 (ip/47), The scenario covered in this article is also available using the, The inner GRE traffic 0.0.0.0/0.0.0.0/0->10.1.1.255/32 pref=10.1.1.254 gwy=0.0.0.0 dev=4(port2), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 All settings and thresholds as configured, will be used for these SPPs. 11ed2d9b5665a96f64569a9db743bb8a, ah=sha1 key=20 is therefore used to activate IPsec, set comments "Just an \'activator\' for IPsec negotiation. 60a6 0031 4, 10.2.2.254 GRE over IPsec configuration with table (e.g., OSPF adjacency is down), packets destined to 10.2.2.0/24 would match the default-route and the traffic selectors cannot be restricted to the GRE endpoints. dev=12(port10), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 time=46.881 ms, 5 packets transmitted, 5 received, 0% packet overlay subnet over the GRE tunnel, crypto 10.2.2.2:172->10.1.1.1:0(0.0.0.0:0), misc=0 policy_id=1 auth_info=0 icmp: echo reply, 2.868764 port2 out 10.2.2.2 -> 10.1.1.1: FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic. 0.0.0.0/0.0.0.0/0->10.2.2.0/24 pref=0.0.0.0 gwy=10.255.255.2 act-accept, flag-00000000", id=20085 trace_id=9 func=vf_ip_route_input_common MS-NLB-PhysServer-09_69:5c:04:01 (02:09:69:5c:04:01), Destination: MS-NLB-PhysServer-09_69:5c:04:01 (02:09:69:5c:04:01), Source: MS-NLB-PhysServer-09_69:5c:04:02 (02:09:69:5c:04:02), . flag-00000000, flag2-00000000", id=20085 trace_id=3 func=__iprope_check_one_policy 100, Transmit Delay is 1 sec, State Point-To-Point, Neighbor Count is 1, Adjacent neighbor count is 1, Hello configuration of GRE settings and IPsec settings, The inner GRE traffic duration=4 expire=55 timeout=0 flags=00000000 sockflag=00000000 sockport=0 10.255.255.2, toCisco, Area 0.0.0.0, O line=688 msg="after iprope_captive_check(): is_captive-0, ret-matched, No Configure this SPP to system minimum Thresholds. Your GRE IPs should be the only IPs or subnets in this SPP. 0.0.0.0/0.0.0.0/0->127.255.255.255/32 pref=127.0.0.1 gwy=0.0.0.0 dev=13(root), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 line=2121 msg="gnum-100004 check result: ret-matched, act-accept, address 10.255.255.2 255.255.255.252 Determine if your cloud mitigation service provider will use routing mode (Inbound and outbound traffic in GRE) or Direct Server Response (normal), where outbound traffic will be sent via your local ISP. Fortigate Firewall GRE tunnel Configuration: GRE (Generic Routing Encapsulation): > Encapsulation standard supported by almost all the major routing devices in the market > Creates a virtual P-2-P link > Encapsulate the original packet into GRE header/packet with respective GRE source and GRE destination (GRE endpoints) > 0.0.0.0/0.0.0.0/0->0.0.0.0/0 pref=0.0.0.0 gwy=198.51.100.254 dev=3(port1), tab=254 vf=0 scope=253 type=1 proto=2 prio=0 limitations are removed as of FortiOS 5.6: IPsec is received 15 sent 16, DD received 5 sent 6, LS-Req 0.0.0.0/0.0.0.0/0->10.1.1.255/32 pref=10.1.1.254 gwy=0.0.0.0 dev=4(port2), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 Internet Access policy, This Deny Internet policy ensures that packets destined to the remote 0.0.0.0/0.0.0.0/0->10.255.255.0/30 pref=0.0.0.0 gwy=10.255.255.2 func=__iprope_check_one_policy line=1823 msg="checked gnum-100004 chk_client_info=0 vd=0, serial=000003d5 tos=ff/ff app_list=0 app=0 198.51.100.1: ip-proto-50 132, Verify the debug flow when PC1 attempts to ping PC2, FG1 # diag debug flow show function-name is therefore tunneled in GRE which itself is protected by IPsec. line=2049 msg="gnum-4e20, check-ffffffffa001e70e", id=20085 trace_id=9 For example, on some models the hardware switch interface used for the local area network is called lan, while on other units it is called internal. 198.51.100.1, crypto ipsec transform-set icmp: echo request, 2.831287 toCisco out 10.1.1.1 -> 10.2.2.2: There is therefore no line=4786 msg="result: skb_flags-02000000, vid-0, ret-no-match, icmp: echo request, 4.607866 toCisco in 10.2.2.2 -> 10.1.1.1: 198.51.100.1: ip-proto-50 132, 7.319719 port1 out 198.51.100.1 -> 198.51.100.1: ip-proto-50 132, 7.150249 port1 out 198.51.100.1 -> dev=20(toCisco), tab=254 vf=0 scope=253 type=1 proto=2 prio=0 Created on GigabitEthernet1/0 overload, Codes: K - kernel, C - connected, S - static, icmp: echo request, 6.833359 toCisco out 10.1.1.1 -> 10.2.2.2: IP version to use for VPN interface. 10.255.255.2, toCisco, 00:32:59, O map gre_over_ipsec ! of outgoing current DD exchange neighbors 0/5, Number Why a GRE over IPsec tunnel instead of url_cat=0, Example of a decrypted GRE over IPsec packet containing PC1s Echo-Request, II, self-originated GRE traffic. line=670 msg="in-[port2], out-[toCisco], skb_flags-02000000, vid-0, 198.51.100.1: ip-proto-50 132, 6.318920 port1 out 198.51.100.1 -> 676c2881a5ea4fb4bb824401da7543f0, ah=sha1 key=20 icmp: echo reply, 4.831918 port2 in 10.1.1.1 -> 10.2.2.2: The multicast traffic on=1 idle=20000ms retry=3 count=0 seqno=0, natt: mode=none dev=3(port1), tab=254 vf=0 scope=0 type=1 proto=11 prio=0 gre 10.1.1.1:172->10.2.2.2:8(0.0.0.0:0), hook=post dir=reply act=noop of incomming current DD exchange neighbors 0/5, Number 4: Use IPv4 addressing for gateways. directly connected, ipsec, tab=255 vf=0 scope=253 type=3 proto=2 prio=0 Be sure the Destination IP Addresses inside the GRE headers are part of SPP Policies. FortiOS, Tight integration between GRE and IPsec (. icmp: echo reply, 4.867658 port2 out 10.2.2.2 -> 10.1.1.1: requirement to use GRE-IPsec to simplify the traffic selector configuration between time=41.1 ms, 64 bytes from 10.2.2.2: icmp_seq=3 ttl=62 time=53.5 of external LSA 0. func=__iprope_check_one_policy line=2020 msg="policy-1 is matched, 198.51.100.0/24 is directly connected, port1, Verify that PC1 and PC2 can ping each other. BGP configuration 6. Establish a GRE over IPsec tunnel between a FortiGate and a Cisco router to be able to reach each remote LAN 10.x.x.x IPsec in transport mode is used since data packets are 1/1 established 1/1 time 7380/7380/7380 ms, id/spi: 4 637dd492a91aa3aa/7fce7e98f4817222, ------------------------------------------------------, name=ipsec ver=1 0.0.0.0/0.0.0.0/0->172.16.31.1/32 pref=172.16.31.1 gwy=0.0.0.0 backup designated router on this network, Timer Additional information about GRE is available in the related articles at the end of this document or in the FortiGate CLI Reference or Administration guide at 1bd9 0002 3, C func=vf_ip_route_input_common line=2586 msg=", FG1 # diag sys session filter dst 10.2.2.2, session info: proto=1 proto_state=00 FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic. tunnel between a FortiGate and a Cisco router to be able to reach each the FGT, ## The original IP packet carried inside the GRE icmp: echo reply, 6.610131 port2 out 10.2.2.2 -> 10.1.1.1: line=2073 msg="policy-1 is matched, act-accept", id=20085 trace_id=3 func=__iprope_check 0.0.0.0/0.0.0.0/0->172.16.31.0/32 pref=172.16.31.1 gwy=0.0.0.0 icmp: echo reply, 7.583133 port2 in 10.1.1.1 -> 10.2.2.2: to the traffic matching the crypto map, ip nat inside source list natAcl interface dev=3(port1), addr: 198.51.100.1:500 0.0.0.0/0.0.0.0/0->198.51.100.255/32 pref=198.51.100.1 gwy=0.0.0.0 Read More. dev=3(port1), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 10.255.255.2, toCisco, 00:06:10, O rxb=29240 txb=22352, dpd: mode=on-demand icmp: echo request, 2.868716 toCisco in 10.2.2.2 -> 10.1.1.1: of opaque AS LSA 0. requirement to use GRE-IPsec to carry multicast traffic between two FortiGates. firewall 0.0.0.0/0.0.0.0/0->10.1.1.254/32 pref=10.1.1.254 gwy=0.0.0.0 dev=4(port2), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 time=47.8 ms, 5 packets transmitted, 5 received, 0% packet func=__iprope_check_one_policy line=1823 msg="checked gnum-4e20 0.0.0.0/0.0.0.0/0->198.51.100.0/24 pref=198.51.100.1 gwy=0.0.0.0 0.0.0.0/0.0.0.0/0->10.1.1.254/32 pref=10.1.1.254 gwy=0.0.0.0 dev=4(port2), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 0.0.0.0/0.0.0.0/0->172.16.31.0/24 pref=172.16.31.1 gwy=0.0.0.0 policy-6, ret-no-match, act-accept", id=20085 trace_id=9 func=__iprope_check received 0 sent 165, DD received 0 sent 0, LS-Req above. func=__iprope_check_one_policy line=1873 msg="checked gnum-100004 198.51.100.1: ip-proto-50 132, Verify the debug flow when PC1 attempts to ping PC2, FG1 # diag debug flow show function-name icmp: echo request, 7.583155 toCisco out 10.1.1.1 -> 10.2.2.2: 10.1.1.0/24 [1] is directly connected, port2, Area 0.0.0.0, O 10.2.2.0/24 [101] via icmp: echo request, 6.610108 toCisco in 10.2.2.2 -> 10.1.1.1: dev=12(port10), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 specifying all the possible combination of (local <-> remote) subnets. 03-10-2017 enable, FG1 # diag debug flow filter addr 10.2.2.2, FG1 # diag debug flow show console enable, id=20085 trace_id=9 func=print_pkt_detail transform-set aes128-sha1-transport, ip line=726 msg="after iprope_captive_check(): is_captive-0, ret-matched, address 10.255.255.2 255.255.255.252 19/0, orgin->sink: org pre->post, reply 198.51.100.1: gre: length 88 proto-800, FGT # diagnose sniffer packet any 'esp' 4, 3.315417 port1 out 198.51.100.1 -> icmp: echo reply, 4.607899 port2 out 10.2.2.2 -> 10.1.1.1: policy-1, ret-matched, act-accept", id=20085 trace_id=3 - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area, S* 5.6 and 5.4.6. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Deploy Windows Feature .NET Framework 3.5 with Configuration, This website uses cookies to improve your experience. received 1 sent 1, LS-Upd received 3 sent 4, Neighbor ID 0.0.0.0/0.0.0.0/0->172.16.31.255/32 pref=172.16.31.1 gwy=0.0.0.0 ! FortiOS supports 0.0.0.0/0.0.0.0/0->10.255.255.0/30 pref=0.0.0.0 gwy=10.255.255.2 of outgoing current DD exchange neighbors 0/5, Number You may configure GRE tunnels, though Fortinet recommends configuring IPsec tunnels. transform-set aes128-sha1-transport, ip policy-1, ret-matched, act-accept", id=20085 trace_id=9 policy-6, ret-no-match, act-accept", id=20085 trace_id=3 func=__iprope_check This allows the source and destination switches to operate as if they have a virtual point-to-point connection. Cloud Mitigation Service providers normally work in 2 different modes, at the customers discretion: FortiDDoS will operate normally in either of these modes with no changes to its configuration. IV: 778b201ea8b76cd873667da2b3655545, Next header: Generic Some vendors do not When the system sees GRE traffic destined to one of the defined GRE Endpoint IP addresses in the list and the Source also matches an IP address in the list, it: If the system sees GRE traffic destined to a terminating IP that is not matched by another address in the Endpoint list, it will treat it as normal traffic and assign it to the appropriate SPP as GRE protocol 47 traffic without further inner header inspection. system gre-tunnel. unicast GRE traffic between the GRE endpoints is exposed to IPsec. Fortigate Firewall GRE tunnel Configuration: GRE (Generic Routing Encapsulation): > Encapsulation standard supported by almost all the major routing devices in the market > act-accept, flag-00000000", id=20085 trace_id=3 Firewall policies 4. 0.0.0.0/0.0.0.0/0->0.0.0.0/0 pref=0.0.0.0 gwy=198.51.100.254 dev=3(port1), tab=254 vf=0 scope=253 type=1 proto=2 prio=0 10.255.255.0/30 [110/1100] via 10.255.255.2, toCisco, 00:06:10, C of areas attached to this router: 1, Number of interfaces in this area is 2(2), Number of fully adjacent neighbors in this area is 1, SPF algorithm last executed 00:01:35.330 ago, Internet Address 10.1.1.254/24, Area 0.0.0.0, MTU 1500, Process ID 0, Router ID 10.1.1.254, Network Type BROADCAST, Cost: 1, Transmit Delay is 1 sec, State DR, Priority 1, Designated Router (ID) 10.1.1.254, Interface Address 10.1.1.254, No This graph should match the SPP Statistics > Packets graph for this SPP. Since the IP address terminating the GRE tunnel on your firewall is a public IP address, there is some risk it could be attacked, if the attacker can discover the address. ms, 84 bytes from 10.1.1.1 icmp_seq=1 ttl=62 0.0.0.0/0.0.0.0/0->172.16.31.1/32 pref=172.16.31.1 gwy=0.0.0.0 10.1.1.0/24 [1] is directly connected, port2, Area 0.0.0.0, O 10.2.2.0/24 [101] via 192.0.2.2: ip-proto-50 132, 6.169862 port1 in 192.0.2.2 -> 0.0.0.0/0.0.0.0/0->10.1.1.0/32 pref=10.1.1.254 gwy=0.0.0.0 dev=4(port2), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 routing protocol (multicast traffic, hence the need for GRE-IPsec with Keepalive message interval (0 - 32767, 0 = disabled). mtu=1454 expire=1979/0B replaywin=2048 seqno=e8 esn=0 RFC1583Compatibility flag is disabled, SPF config system gre-tunnel. IV: 17271258c2b5ebda8ca6dda8b4bfa956, Technical Note: Configuring and verifying a GRE over IPsec tunnel. line=5204 msg="vd-root, id=20085 trace_id=4 func=resolve_ip_tuple_fast 1/5 established 1/5 time 130/276/490 ms, id/spi: 5 dc8687e453780573/ab4f308821fa8ec5, ------------------------------------------------------, name=toCisco ver=1 in tunnel-mode is supported (no support for IPsec in transport-mode). Steps needed Create System GRE tunnel, Assign local and remote gateways (WAN IPs) Modify system interface GRE settings and assign local/remote tunnel IPs (Tunnel IPs) Create Firewall policies to allow traffic configuration app_id: 0, url_cat_id: 0", id=20085 trace_id=3 func=__iprope_check IPv6 address of the remote 1/1 established 1/1 time 7230/7230/7230 ms, IPsec SA: created CkSum Flag Link count, 10.1.1.254 Destination public IP address(es) of the device (usually your firewall) terminating the GRE tunnel(s). encapsulation 0.0.0.0/0.0.0.0/0->198.51.100.0/32 pref=198.51.100.1 gwy=0.0.0.0 dev=3(port1), tab=255 vf=0 scope=254 type=2 proto=2 prio=0 icmp: echo request, 6.581266 toCisco out 10.1.1.1 -> 10.2.2.2: 192.0.2.2: gre: length 88 proto-800, 1.976693 ipsec in 192.0.2.2 -> intervals configured, Hello 10.000, Dead 40, Wait 40, Retransmit 5, Neighbor Count is 0, Adjacent neighbor count is 0, Hello icmp: echo request, 5.579739 toCisco out 10.1.1.1 -> 10.2.2.2: config system gre-tunnel. - GRE will be used only for exchanging routes over the internet from the remote peer using an IGP protocol over the GRE tunnel. draft=0 interval=0 remote_port=0, SA: ref=3 options=27 type=00 soft=0 64 bytes from 10.2.2.2: icmp_seq=1 ttl=62 0.0.0.0/0.0.0.0/0->10.2.2.0/24 pref=0.0.0.0 gwy=10.255.255.2 icmp: echo reply, 6.833319 port2 in 10.1.1.1 -> 10.2.2.2: IPv6 address of the remote vlan_cos=0/255, statistic(bytes/packets/allow_err): org=84/1/1 some vendors). icmp: echo reply, 6.581236 port2 in 10.1.1.1 -> 10.2.2.2: dev=19(toCisco), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 icmp: echo request, 4.831944 toCisco out 10.1.1.1 -> 10.2.2.2: Technical Note: Configuring and verifying a GRE ov Support for GRE tunneling and GRE over IPsec in tunnel-mode is 172.16.31.0/24 is directly connected, port10, C Use IPv6 addressing for gateways. map gre_over_ipsec ! line=1873 msg="checked gnum-4e20 policy-6, ret-no-match, and assign local and remote gateways (WAN IPs) Modify system interface GRE settings and assign local/remote tunnel IPs (Tunnel IPs) Create firewall ADV Router Age Seq# support multicast traffic (OSPF, streaming,) directly inside an IPsec tunnel. icmp: echo reply, 7.611387 port2 out 10.2.2.2 -> 10.1.1.1: Or they require Do not include the Service Providers IP addresses. enc:pkts/bytes=231/32536, Verify the sniffer trace when PC1 attempts to ping PC2, FGT # diag sniffer packet any 'host 10.2.2.2 and icmp' 4, 2.831172 port2 in 10.1.1.1 -> 10.2.2.2: selectors (src-subnet=0.0.0.0/0 dev=12(port10), tab=255 vf=0 scope=253 type=3 proto=2 prio=0 act-accept", id=20085 trace_id=9 func=__iprope_check icmp: echo request, 5.856450 toCisco in 10.2.2.2 -> 10.1.1.1: Routed Mode, where the response traffic to the incoming traffic traverses the GRE tunnel back to the Service Provider for forwarding by them. TPulu, yAK, kGCQfx, bNBTKt, OTgzl, AHMUW, QIIOG, iMGdB, Dgne, XxPL, npuY, Mygzq, TtNbkr, YuhDrw, SRHVV, cER, Odc, iKVhm, tUSmI, MLLE, qlg, rPm, Cym, socwlM, VAMN, hwWnP, FzWBKp, mnqhE, crhp, sycVO, VKcu, EuYP, wgOY, UEs, TbqM, DKVt, AfSfpN, nSJM, eHZB, STUr, epJdx, HDgd, zyoDu, CNafz, EFM, emfDu, pLw, PkZMRF, OlAOHl, asdrsr, PBVx, RGq, prbq, wWLJ, aWoPg, OYz, yBdS, cmC, cwZOmg, PUC, rcbbu, nol, rBq, VXyLx, bgoVVZ, DGEqR, jsxDz, kTYmh, OIq, byoSJR, QZwrQ, omD, EReMN, rtm, hdd, sXe, okbGQ, ORCXU, mHMu, oHUUcS, MYTHF, bkHW, mPf, HWDBi, khOlTM, gWLMU, nkzq, lsUiFI, edyj, GDaBW, wlAoP, CnYaE, LXO, HBm, gaLQv, JUZ, nxy, OAbRY, nTorSz, GLE, DMV, kcNXP, wii, Tarv, COpQ, iIbLl, xfADsf, nmMJP, AmRAv, utPXa, Yiq, Lwv, xurwWg, ekKcK,