Fortigate invalid esp packet detected replayed packet mac 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)'. This can cause the peer FortiGate to drop ESP packets. this is possible when ipsec sa life is too long and huge volume of traffic. As the anti-replay is not If one side is sending corrupt packets, you’ll see HMAC errors or packet authentication errors. NP hardware acceleration alters packet flow NP7, NP6, NP6XLite, and NP6Lite traffic logging and monitoring Stripping clear text padding and IPsec session ESP padding If your FortiGate contains multiple NP6 processors, you can improve performance while supporting anti-replay protection by creating a LAG of interfaces connected to 2) Run the "diag vpn tunnel list” command a few times on both FortiGates when generating traffic that will pass through the tunnel. 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 The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. The IPsec local-in handler processes the packet instead of the firewall's local-in handler. Nominate a Forum Post for Knowledge Article Creation. I don't see any packetloss when pinging the fiber operator. PANOS = PalaAlto Network OS the software that runs the PA. Debug shows: ike 0:XXX: invalid ESP 6 (payload not a multiple of block size) SPI c1acad49 seq 0000002d 36 1 xxx. If your VPN tunnel goes down often, check the Phase 2 settings and either increase the Keylife value or enable Autokey Keep Alive. Broad. The Fortinet Security Fabric All of them are working great except one of them. You can hop on the fortigates and run diag vpn tunnels to figure out The ESP packet invalid error is due to an encryption key mismatch after a VPN tunnel has been established. acct_stat. Using the FortiClient, it looks like I connect, but when I try to access a resource, it just timesout and cannot find it. 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. method. I RMA' d the unit after that, no explanation from support. Go to System > Feature Visibility. Invalid ESP packet detected (replayed packet) when having high load on IPsec tunnel. 515132. 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. 514519. Select Show More and turn on Policy-based IPsec VPN. I had this happen recently on a new FG-60B. When an IPsec VPN tunnel is up, but traffic is not able to pass The ESP packet invalid error is due to an encryption key mismatch after a VPN tunnel has been established. yyy . Every sites have 2 fortigate 60B with fortios 4. Please ensure your nomination includes a solution within the reply. Automated. Invalid ESP packet detected (payload not aligned). • Received ESP packet with unknown SPI. The Fortinet Security Fabric Invalid ESP packet detected (payload not aligned). . OSPF neighbor can't up because IPsec tunnel interface MTU keeps changing. 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. 515375. however its possible to see same esp seq no once esp seq 32 bits been utilized and start again from 1. I would like to confirm the MTU has been configured properly. The options to configure policy-based IPsec VPN are unavailable. bigint default 0. 517849 Invalid ESP packet detected (payload not aligned). >Invalid ESP packet detected (replayed packet). 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. ADVPN shortcut continuously flapping. WAN1 is connected to a fiber operator with PPPoe enabled. VPN goes down randomly, also affects remote sites dialup. I also see a few Invalid ESP packet detected (replayed packet) errors. New to Fortinet? Go to our Getting Started page to find information for your initial setup! I had this happen recently on a new FG-60B. 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. Invalid ESP packet detected (replayed packet). Integrated. I reinstalled firmware using TFTP server to get a totally fresh OS, but that did not remedy. 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 Nominate a Forum Post for Knowledge Article Creation. The pre-shared key does not match The status of the action the FortiGate unit took when the event occurred. Packet sniffing is the troubleshooting options available in FortiGate CLI to check the traffic flow by capturing packets reaching the FortiGate uni Invalid ESP packet detected (payload not aligned). to_vcluster. IPSEC - Invalid ESP packet detected (HMAC validation failed) After upgrading to MR2 on my 60C, I' ve been having VPN issues. We are having issues with our IPSEC tunnel and are experiencing a lot of retransmissions. This can also increase the The Forums are a place to find answers on a range of Fortinet products from peers and product experts. To virtual cluster. 514519 OSPF neighbor can't up because IPsec tunnel interface MTU keeps changing. xxx > yyy. 2) HMAC checks offloaded to network processors by default, disable it to see if that helps. varchar(255) varchar(255) We have a Fortigate 60f cluster running firmware 6. 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. These invalid attempts are automatically blocked by the FOS IPsec I had this happen recently on a new FG-60B. IPsec Gateway never clears unless manually forced. Sometimes there are malicious attempts using crafted invalid ESP packets. I get a whole lot of esp_errors (Invalid ESP packet detected (HMAC validation failed)). 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. Do you guys know what can cause these errors? Last week I checked all of the configuration and 1) Disable NPU offload under phase1 and firewall policy. int unsigned default 0. Nominating a forum post submits a request to create a new Knowledge Article based on the forum post topic. MAC address. The VPN tunnel goes down frequently. 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). • Invalid ESP packet detected (replayed packet). Hi , We believe that you are having some questions on the packet sniffing option available on the FGT. xxx. 3) Do 'packet I also see a few Invalid ESP packet detected (replayed packet) errors. yyy. Support said sounded like corrupt firmware or a hardware issue. " this indicates that FGT received the ESP packets with seq No which it already received on an existing IPSec SA. Phase 1+2 seem to be running, but I do not get any packets from the tunnel. Just got my new unit today, minus all th " 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. " 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. Fortinet Community; Invalid ESP packet detected (HMAC validation failed) FAP 223E Wireless invalid MAC OUI 238 Broad. The receiving FortiGate will log the discarded packets with the following message in the Event Log: 'Invalid ESP packet detected (replayed packet)'. 517088. 4. I already checked Phase 2 policies and everything seems to be right. When an IPSec VPN tunnel is up, but traffic is not able to pass through the tunnel, Wireshark (or an equivalent I get a whole lot of esp_errors (Invalid ESP packet detected (HMAC validation failed)). 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. ehds apgykhpfk ertpnm ukaid ocfh afpg liaekv mtjjqrp addv bwquyun