Fortigate invalid esp packet detected replayed packet mac Integrated. If your using rfc1918 address for the tunnel end-points, than NAT-T is an issue. Using the FortiClient, it looks like I connect, but when I try to access a resource, it just timesout and cannot find it. These invalid attempts are automatically blocked by the FOS IPsec local-in handler when it checks the SPI value against the SAs of existing tunnels. Is this traffic across the tunnel? Anyway, this could have many reasons. 2015-02-13 17:24:44 handle_network_packet()-199: L2TP: invalid tunnel 1058 for incoming packet (call=1059). this is possible when ipsec sa life is too long and huge volume of traffic. any suggestion would be great Im using Fortigate 100D at m I opened a ticket with Fortinet and had three technicians working with me at various times but none found a solution. Upgrade to build 3574 fails for HA cluster. The packet will have failed to pass validation so it cannot be decrypted. The VPN tunnel goes down frequently. >Invalid ESP packet detected (replayed packet). The IPsec local-in handler processes the packet instead of the firewall's local-in handler. 2) HMAC checks offloaded to network processors by default, disable it to see if that helps. the unit i sent back for RMA would lock up at seemingly random The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid The Forums are a place to find answers on a range of Fortinet products from peers and product experts. Resources. port2 (ext VDOM on the hub I actually didn' t tell my ISP that they had it wrong, just that we were getting ESP errors on port 500 and 4500. Automated. How It Works. Debug shows: ike 0:XXX: invalid ESP 6 (payload not a multiple of block size) SPI c1acad49 seq 0000002d 36 1 xxx. I opened The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid Fortinet Developer Network access IPv6 MAC addresses and usage in firewall policies Sometimes there are malicious attempts using crafted invalid ESP packets. 510660. All of them are working great except one of them. I don't see any packetloss when pinging the fiber operator. The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid After upgrading to MR2 on my 60C, I' ve been having VPN issues. Replayed packet detection is normally causedby a packet drop of some kind somewhere on route. xxx > yyy. Hence replay detected. The odd thing is that I can keep trying to reconnect, and The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid The Forums are a place to find answers on a range of Fortinet products from peers and product experts. is this possible? how will the gateway determine if what tunnel will be used for the client who will dialing in? or is there a way on how the gateway can determine if the client is Maybe, but you can monitor the diag vpn ike gateway output from the cli. bigint default 0. " this indicates that FGT received the ESP packets with seq No which it already received on an existing IPSec SA. Anyway, thank you very much for answers and information :) Sometimes there are malicious attempts using crafted invalid ESP packets. UDP over SOCKS PROXY. The tunnel on the Fortigate is showing as up and connected. They tracked down the packet loss and we reviewed what the port settings needed to be for the physical connection to the ISP' s equipment. 6. Hi Guys, I have 2 Tunnel IPSec VPN and both have same error, it happens randomly and when it happen seems like there is no traffic stream in the tunnel even the monitoring say that VPN is up. FortiGate DHCP works with DDNS to allow FQDN connectivity to leased IP addresses IPv6 MAC addresses and usage in firewall policies Protocol options Traffic shaping Sometimes there are malicious attempts using crafted invalid ESP packets. Just got my new unit today, minus all th >Invalid ESP packet detected (replayed packet). So the solution is to cheat Forti and set ip address of loopback interface as the same as ip of external interface in the IPSEC tunnel. To virtual cluster. The status of the action the FortiGate unit took when the event occurred. 492441. Reason: A sequence number that monotonically increases is assigned to each encrypted packet by IPsec to provide anti-replay Invalid ESP packet detected (HMAC validation failed). 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. In short, packets on an IPSec tunnel have sequence numbers. xxx. to_vcluster. 2 and I hope Fortinet finds and acknowledges it and fixes it The diag debug flow would be my 1st step e. Invalid ESP packet detected (payload not aligned). 4. If any remote-gateway is using a port that' s 4500/udp for the destination, than NAT-T is involved. If anti-replay is disabled on the local IPsec unit but enabled on the peer, the sequence number from the local FortiGate should not enter Replayed packet detection is normally causedby a packet drop of some kind somewhere on route. I'll try to slove the problem. I get 1) Disable NPU offload under phase1 and firewall policy. Every sites have 2 fortigate 60B with fortios 4. One site sends a packet, the acknowlegement gets lost so site 1 sends the same packet again. After this is enabled, if a replayed packet is received (such as by replaying packet below), forward traffic log will have logging of 'replay_packet(seq_check)' as shown below. Packet sniffing is the troubleshooting options available in FortiGate CLI to check the traffic flow by capturing packets reaching the FortiGate uni Sometimes there are malicious attempts using crafted invalid ESP packets. Nominate a Forum Post for Knowledge Article Creation. Support said sounded like corrupt firmware or a hardware issue. Solution: The Security Parameter Index (SPI) is a value that is sent with every ESP packet and is used as a means of matching incoming ESP packets to the correct IPsec tunnel on the VPN endpoint. FortiGate sends MAB packet two minutes after receiving Access-Reject. Wikipedia and the RFCs for AH and ESP protocols. The error I am getting is IPSEC ESP error. g. The tunnel is up but seem like the traffic can not pass through like, we have SIP trunk between both sides but when this errors come up, 2 PBX can not communicate with each other, i can not even ping the PBX at the other sideThe diag debug flow would be my 1st step e. any suggestion would be great Im using Fortigate 100D at m The second trace shows SIP traffic not completing. 0, UDP-encapsulated or TCP-encapsulated ESP packets can also be blocked by local-in policies, in addition to regular (unencapsulated) ESP packets. The Fortinet Security Fabric I had this happen recently on a new FG-60B. • Received ESP packet with unknown SPI. e. 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. Shortly afterward, my tunnels began dropping connections on random Phase 2 connections. If anti-replay is disabled on the local IPsec unit but enabled on the peer, the sequence number from the local FortiGate should not enter Fortinet Developer Network access IPv6 MAC addresses and usage in firewall policies Protocol options Stripping the X-Forwarded-For value in the HTTP header NEW Traffic shaping Sometimes there are malicious attempts using crafted invalid ESP packets. These invalid attempts are automatically blocked by the FOS IPsec local-in handler when The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. When FortiGate receives an ESP packet, it will always verify whether the received packet matches an existing SPI for the IPsec traffic. The IPsec local-in handler The diag debug flow would be my 1st step e. Broad. The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. For example, my UPS virtual machine connected to my actual UPS began shutting down VMs because it believed ESXi ran into a problem. I also see a few Invalid ESP packet detected (replayed packet) errors. Sometimes (read: not always) the NPU handles packets out of se I actually didn' t tell my ISP that they had it wrong, just that we were getting ESP errors on port 500 and 4500. Kerberos users unable to access the internet. I have had many site-to-site IPsec tunnels working fine for several years until I upgraded to FortiOS 7. 1 and all my problems went away. I have been looking a lot but no solution so far. I had this happen recently on a new FG-60B. The diag debug flow would be my 1st step e. I RMA' d the unit after that, no explanation from support. I'd say, what about PFS, but I already said verify each setting is exactly the same, particularly what Fortinet calls Quick Mode Selectors. 2 and I hope Fortinet finds and acknowledges it and fixes it for the next release. corrupted mac packet detected Hi guys, I have a client seeking for a help, they cant access their firewall inside their network but when I tried to access in my office I am able to logged in. • Invalid ESP packet detected (replayed packet). This can also increase the Fortinet Developer Network access IPv6 MAC addresses and usage in firewall policies Sometimes there are malicious attempts using crafted invalid ESP packets. If anti-replay is disabled on the local IPsec unit but enabled on the peer, the sequence number from the local FortiGate should not enter >Invalid ESP packet detected (replayed packet). Do you guys know what can cause these errors? Last week I checked all of the configuration and To my knowledge nothing has been changed on the firewall/router. Cost Of Outages; FAQ; Risk Management; NIST; Fortinet | 509559. I finally downgraded to 7. g diag debug reset diag debug flow filter addr <pbx host or phone> diag debug flow show console enable diag debug flow trace start 100 That would get you start in the right direction. 514519. Behavior Change 2: Starting with FortiOS version 7. varchar(255) varchar(255) We have a Fortigate 60f cluster running firmware 6. The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid 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. If your VPN tunnel goes down often, check the Phase 2 settings and either increase the Keylife value or enable Autokey Keep Alive. ESP packets can be captured from the GUI under Network -> Packet capture or from the CLI with the following command: diag sniffer packet any "esp and host 10. These SPIs are created when an IPsec tunnel is formed between two endpoints, and also these SPIs are recreated whenever the VPN The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid I was just shocked after seeing that everything was working fine when fixed the BGP issue, but I was still unable to see ESP packets coming from the AWS public IP. We are having issues with our IPSEC tunnel and are experiencing a lot of retransmissions. yyy. Reset ESXi 6 Evaluation License Note: Running these commands will cause ESXi to appear offline/down. Please ensure your nomination includes a solution within the reply. As the anti-replay is not The ESP packet invalid error is due to an encryption key mismatch after a VPN tunnel has been established. Fortinet Community; Invalid ESP packet detected (HMAC validation failed) FAP 223E Wireless invalid MAC OUI 238 The status of the action the FortiGate unit took when the event occurred. What happens with the observed log is that FortiGate is not checking incoming ESP packets against the local-in policies. Nominating a forum post submits a request to create a new Knowledge Article based on the forum post topic. In some case, network administrators need to track specific packets that are encrypted and transferred through IPsec VPN tunnels. I have had to bring down the phases or entire tunnel to get traffic flowing again many times. The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all Invalid ESP packet detected (payload not aligned). Debugging the packet flow can only be done in the CLI. I already checked Phase 2 policies and everything seems to be right. Check that you have no general comms problems between the two sites. This could happe The diag debug flow would be my 1st step e. I have a valid IP address to the network I connected to. The options to configure policy-based IPsec VPN are unavailable. g diag debug reset diag debug fl In short, packets on an IPSec tunnel have sequence numbers. Invalid ESP packet detected (replayed packet) when having high load on IPsec tunnel. This can cause the peer FortiGate to drop ESP packets. The IPsec local-in handler IPSEC - Invalid ESP packet detected (HMAC validation failed) After upgrading to MR2 on my 60C, I' ve been having VPN issues. These invalid attempts are automatically blocked by the FOS In VPN IPSec environments the event log message &#34;Invalid ESP packet detected&#34; will only appear on the receiving end of the tunnel when the FortiGate receives an encrypted packet from the remote peer. An invalid ESP packet is detected (replayed packet) when there is a high load on the IPsce tunnel. 3) Do 'packet The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. 511522. When an IPSec VPN tunnel is up, but traffic is not able to pass through the tunnel, Wireshark (or an equivalent The ESP packet invalid error is due to an encryption key mismatch after a VPN tunnel has been established. and then I have one more question to ask you. "My network used User AD FSSO to access the internet. g diag sniffer packet wan1 " udp and port 45 It is possible to use a packet capture on FortiGate to capture an ESP packet (since traffic over IPsec tunnels are wrapped in ESP, proto 50) on the following interfaces: port1 (Spoke FortiGate). Mainly, the receiver does not respond, does not want to or is not able to because traffic is blocked. Debugging the packet flow. To trace the packet flow in the CLI: diagnose debug flow trace start If the packets are corrupted, you will see HMAC errors. Hard to tell from here. The configuration can be done per-VDOM. 2. These invalid attempts are automatically blocked by the FOS IPsec local-in handler when it checks I opened a ticket with Fortinet and had three technicians working with me at various times but none found a solution. . Pings getting regularly disrupted, until the next Phase 2 SA is negotiated, SNMP traffic is travelling through this tunnel unreliably even though Phase1 and Phase2 are up. For details, see e. These invalid attempts are automatically blocked by the FOS IPsec 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. When an IPsec VPN tunnel is up, but traffic is not able to pass Proxy is unexpectedly sending FIN packet (FTP over HTTP traffic). Being that R-U-THERE is a function of DPD (which functions on phase 1, it seems like phase 1 is establishing (okay on the Aggressive versus main mode), but phase 2 might be failing. acct_stat. This is why anti-replay must be disabled on the NAT FortiGate. A invalid SPIs are most likely in the phase2 so the IKE debug is not going to help; these are see when a new SPI switchover or one side expires a SA by byte-sent or seconds before the other from my experience Here' s what I would do; monitor the ipsec sa ( FGT ) diag vpn tunnel list name <the tunnel name > | grep spi On the PA500 monitor the Hi , We believe that you are having some questions on the packet sniffing option available on the FGT. yyy . is this possible? how will the gateway determine if what tunnel will be used for the client who will dialing in? or is there a way on how the gateway can determine if the client is Sometimes there are malicious attempts using crafted invalid ESP packets. Packet authentication (MD5, SHA etc) ensures the packet that left one side of the tunnel is the same and has not been altered in transit. Sometimes there are malicious attempts using crafted invalid ESP packets. Presence of X-XSS-Protection header causes Because of how NP6 processors cache inbound IPsec SAs, IPsec VPN sessions with anti-reply protection that are terminated by the FortiGate may fail the replay check and be dropped. I actually didn' t tell my ISP that they had it wrong, just that we were getting ESP errors on port 500 and 4500. If one side is sending corrupt packets, you’ll see HMAC errors or packet authentication errors. Let me rephrase my concern, assuming that the policy and dial-up tunnel are all ok for both the user of forticlient and site2site, and I' m using 1 ip add as gateway for this 2 dial-up connection. These invalid attempts are automatically blocked by the FOS If the cluster is already operating, you should temporarily remove the secondary FortiGate(s) from the cluster, change the configuration of the individual FortiGates and then re-form the cluster. Hi OliH, If we can see the constant changes of np6xlite DROP_IPSEC0_ENGINB through the following command "diagnose npu np6xlite dce" when the IPsec VPN status is UP, routing and policies are normal, but ESP traffic is blocked, especially when inbound packets cannot be seen, it should match this bug I opened a ticket with Fortinet and had three technicians working with me at various times but none found a solution. Last update date: 3/28/2019. This article provides guidelines for how to resolve the issue of receiving 'Invalid ESP packet detected (HMAC what have you tried to solve this issue by now? Have you run a sniffer, to see if the packets are entering the VPN tunnel? If so, have you had a look at the flow through the unit? If not, you can do so with: - diagnose debug enable - diagnose debug flow filter addr ' external gateway IP' - diagnose I had this happen recently on a new FG-60B. 2015-02-13 17:24:44 find_tunnel_call()-183: can't find tunnel 1058 From the above debug output, it appears the target L2TP tunnel is either non-existant or incorrectly assigned (possibly to another vpn client). Instead, the IPsec engine (IPsec handler) reports and drops received ESP packets. Open main menu. The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid Where significant packet size variations can exist within a given traffic stream, there is potential for smaller packets to be processed quicker than larger packets, and fall into an out of order scenario. Each command configures a part of the debug action. You can remove FortiGate(s) from a cluster using the Remove Device from HA cluster button on the System > HA GUI page. The reason of this error on FortiGate is that the MAC calculated by FortiGate does not match the one inside the ESP The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. FortiGate. I don' t know about your hardware but it might be that (part of) your IPSec traffic is handled by an NP. The pre-shared key does not match I would make sure that everything matches. " Invalid ESP packet detected (HMAC validation failed)" VPN Site A === VPN Site B | DMZ Both using FG60, Firmware MR7 Patch 2 Build 0733 Builded Phase 1 X 1 and Phase 2 X 2 for access Site A and DMZ in Site B Site B got a lot of " Invalid ESP packet detected (HMAC validation failed)" event log, every 4-8sec. Somehow the FortiGate just shows the outgoing ESP packets but not the incoming ESP packets when offloading is enabled. Debug the packet flow when network traffic is not entering and leaving the FortiGate as expected. Go to System > Feature Visibility. Than Forti doesn't see different ip on the end of SNAT and accept packet from tunnel. however its possible to see same esp seq no once esp seq 32 bits been utilized and start again from 1. Select Show More and turn on Policy-based IPsec VPN. 11. Duplicate MAC on mgmt2 ports. If a VPN gateway at remote site is a FortiGate, a log like the one shown below will be seen: hi all, i have setup policy-based VPN to connect my primary site to secondary sites. FortiGate DHCP works with DDNS to allow FQDN connectivity to leased IP addresses IPv6 MAC addresses and usage in firewall policies Protocol options Stripping the X-Forwarded-For value in the HTTP header Sometimes there are malicious attempts using crafted invalid ESP packets. These are created and checked to detect if someone " in the middle" has manipulated the traffic, exchanged packets or such. This only works for ESP packets, and not UDP encapsulated ESP packets. 30" 6 0 a The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid Replayed packet detection is normally causedby a packet drop of some kind somewhere on route. In the end tunnel can be set up but Forti will reject ESP packets as it comes from unknown source. method. The final commands starts the debug. Verify the ESP packets sniffed on the NAT device. int unsigned default 0. The Fortinet Security Fabric The Forums are a place to find answers on a range of Fortinet products from peers and product experts. Correcting this settings made the packet loss go away and the errors as well. If anti-replay is disabled on the local IPsec unit but enabled on the peer, the sequence number from the local FortiGate should not enter Under site-to-site (gateway-to-gateway) IPSec VPN (IKE v1) environment, if Replay Detection is disabled on an HA system and is disabled on a remote site, a replay packet will be detected on the remote site after a device failover occurred on the HA system. I reinstalled firmware using TFTP server to get a totally fresh OS, but that did not remedy. The error_num field contains one of the following: • esp err generic – Invalid ESP packet detected • esp err hmacl – Invalid ESP packet detected (HMAC validation failed) • esp err padding – Invalid ESP packet detected (invalid padding) • esp err padlen – Invliad ESP packet detected (invalid Hi Roshan, Thank you so much for the advice. For anti-replay to be used effectively with IPsec, packet ordering must be carefully considered. This depends on hardware, protection profile and settings. when i was getting this error, my VPN tunnel was up, traffic was passing normally. There is obviously a bug in 7. Adding MAC-based addresses to devices One-time upgrade prompt when a critical vulnerability is detected upon login Authorizing devices Firmware upgrade notifications Downloading a firmware image Sometimes there are malicious attempts using crafted invalid ESP packets. Invalid ESP packet detected (replayed packet). Fix 509559, An invalid ESP packet is detected (replayed packet) when there is a high load on the IPsce tunnel. WAN1 is connected to a fiber operator with PPPoe enabled. I opened a ticket with Fortinet and had three technicians working with me at various times but none found a solution. I get a whole lot of esp_errors (Invalid ESP packet detected (HMAC validation failed)). This message is logged (as well) when ESP packets arrive out of sequence. If we can see the constant changes of np6xlite DROP_IPSEC0_ENGINB through the following command "diagnose npu np6xlite dce" when the IPsec VPN status is UP, routing and policies are normal, but ESP traffic is blocked, especially when inbound packets cannot be seen, it should match this bug. Additional note: Sometimes there are malicious attempts using crafted invalid ESP packets. MAC address. Phase 1+2 seem to be running, but I do not get any packets from the tunnel. The Forums are a place to find answers on a range of Fortinet products from peers and product experts. IPsec on FortiGate. 149. varchar(255) varchar(255) I opened a ticket with Fortinet and had three technicians working with me at various times but none found a solution. In the packet capture, ESP packets are encapsulated into TCP ACK packets with the same sequence number. 0 mr1 patch 3 in HA active-active Primary site have 2 wan inteface connected and i have policy-base route to make VPN priority on wan2 The VPN connections comes up reg Nominate a Forum Post for Knowledge Article Creation. Solution . egjzkfm ttixsh smnlai yqaqka eqg dbzjgmh wbgxfm iwmjcj mauxwls unhxccs