To start, stop, or resume packet capture, use the symbols on the screen. For example, to display UDP port 1812 traffic between 1.example.com and either 2.example.com or 3.example.com, you would enter: 'udp and port 1812 and src host 1.example.com and dst \(2.example.com or 2.example.com \)'. none indicates no filtering, and all packets are displayed as the other arguments indicate. Head_Office_620b # diag sniffer packet port1 none 1 3 interfaces=[port1] filters=[none], 0.545306 172.20.120.17.52989 -> 172.20.120.141.443: psh 3177924955 ack 1854307757, 0.545963 172.20.120.141.443 -> 172.20.120.17.52989: psh 1854307757 ack 3177925808, 0.562409 172.20.120.17.52988 -> 172.20.120.141.443: psh 4225311614 ack 3314279933. Seeing if sessions are setting up properly. Type either none to capture all packets, or type a filter that specifies which protocols and port numbers that you do or do not want to capture, such as 'tcp port 25'. To stop the sniffer, type CTRL+C. For further instructions, see the documentation for that application. This helps to determine if the packets, route, and destination are all what you expect. Examples of non-IP packets include IPsec, IGMP, ARP, and ICMP. There it is, and you also have the ASCII representation. Packet capture output appears on your CLI display until you stop it by pressing Ctrl+C, or until it reaches the number of packets that you have specified to capture. Head_Office_620b # diagnose sniffer packet port1 none 1 3, 0.545306 172.20.120.17.52989 -> 172.20.120.141.443: psh 3177924955 ack 1854307757, 0.545963 172.20.120.141.443 -> 172.20.120.17.52989: psh 1854307757 ack 3177925808, 0.562409 172.20.120.17.52988 -> 172.20.120.141.443: psh 4225311614 ack 3314279933. Accessing additional support resources NEW, Recovering missing graphical components NEW, Connecting FortiExplorer to a FortiGate with WiFi, Configure FortiGate with FortiExplorer using BLE, Transfer a device to another FortiCloud account, Migrating a configuration with FortiConverter NEW, Viewing device dashboards in the Security Fabric, Creating a fabric system and license dashboard, Viewing session information for a compromised host, FortiView Top Source and Top Destination Firewall Objects monitors, Viewing top websites and sources by category, Enhanced hashing for LAG member selection, LAG interface status signals to peer device NEW, Failure detection for aggregate and redundant interfaces, PRP handling in NAT mode with virtual wire pair, Using VLAN sub-interfaces in virtual wire pairs, General VXLAN configuration and topologies, VXLAN over IPsec tunnel with virtual wire pair, VXLAN over IPsec using a VXLAN tunnel endpoint, Upstream proxy authentication in transparent proxy mode, Explicit proxy and FortiGate Cloud Sandbox, Agentless NTLM authentication for web proxy, Multiple LDAP servers in Kerberos keytabs and agentless NTLM domain controllers, CORS protocol in explicit web proxy when using session-based, cookie-enabled, and captive portal-enabled SAML authentication, HTTP connection coalescing and concurrent multiplexing for explicit proxy, IP address assignment with relay agent information option, DHCP smart relay on interfaces with a secondary IP NEW, FortiGate DHCP works with DDNS to allow FQDN connectivity to leased IP addresses, OSPF graceful restart upon a topology change, Next hop recursive resolution using other BGP routes, Next hop recursive resolution using ECMP routes, Defining a preferred source IP for local-out egress interfaces on BGProutes NEW, Support cross-VRF local-in and local-out traffic for local services, NetFlow on FortiExtender and tunnel interfaces, Enable or disable updating policy routes when link health monitor fails, Add weight setting on each link health monitor server, SLA link monitoring for dynamic IPsec and SSL VPN tunnels, IPv6 tunnel inherits MTU based on physical interface, Configuring IPv4 over IPv6 DS-Lite service, Specify an SD-WAN zone in static routes and SD-WAN rules, Defining a preferred source IP for local-out egress interfaces on SD-WAN members NEW, Passive health-check measurement by internet service and application, Mean opinion score calculation and logging in performance SLA health checks, Embedded SD-WAN SLA information in ICMP probes, SD-WAN application monitor using FortiMonitor, Classifying SLA probes for traffic prioritization NEW, Additional fields for configuring WAN intelligence, SDN dynamic connector addresses in SD-WAN rules, Static application steering with a manual strategy, Dynamic application steering with lowest cost and best quality strategies, DSCP tag-based traffic steering in SD-WAN, ECMP support for the longest match in SD-WAN rule matching, Override quality comparisons in SD-WAN longest match rule matching, Internet service and application control steering, Use maximize bandwidth to load balance traffic between ADVPN shortcuts NEW, Use SD-WAN rules to steer multicast traffic NEW, Controlling traffic with BGP route mapping and service rules, Applying BGP route-map to multiple BGP neighbors, Using multiple members per SD-WAN neighbor configuration, Hold down time to support SD-WAN service strategies, Speed tests run from the hub to the spokes in dial-up IPsec tunnels, Interface based QoS on individual child tunnels based on speed test results, Keeping sessions in established ADVPN shortcuts while they remain in SLA NEW, Using a single IKE elector in ADVPN to match all SD-WAN control plane traffic NEW, Configuring SD-WAN in an HA cluster using internal hardware switches, SD-WAN segmentation over a single overlay, Matching BGP extended community route targets in route maps, Copying the DSCP value from the session original direction to its reply direction, Configuring the VPN overlay between the HQ FortiGate and cloud FortiGate-VM, Configuring the VPN overlay between the HQ FortiGate and AWS native VPN gateway, Configuring the VIP to access the remote servers, Configuring the SD-WAN to steer traffic between the overlays, Establish device identity and trust context with FortiClient EMS, Access control of unmanageable and unknown devices, HTTP2 connection coalescing and concurrent multiplexing for ZTNA, Mapping ZTNA virtual host and TCP forwarding domains to the DNS database, ZTNA HTTPS access proxy with basic authentication example, ZTNA application gateway with SAML authentication example, ZTNA application gateway with SAML and MFA using FortiAuthenticator example, ZTNA troubleshooting and debugging commands, HTTP2 connection coalescing and concurrent multiplexing for virtual server load balancing, NAT46 and NAT64 policy and routing configurations, Recognize anycast addresses in geo-IP blocking, Matching GeoIP by registered and physical location, HTTP to HTTPS redirect for load balancing, Use Active Directory objects directly in policies, Seven-day rolling counter for policy hit counters, Cisco Security Group Tag as policy matching criteria, Virtual patching on the local-in management interface, Configuring PCP port mapping with SNAT and DNAT NEW, Using wildcard FQDN addresses in firewall policies, ClearPass integration for dynamic address objects, IPv6 MAC addresses and usage in firewall policies, Local-in and local-out traffic matching NEW, VLAN CoS matching on a traffic shaping policy NEW, Traffic shaping with queuing using a traffic shaping profile, Changing traffic shaper bandwidth unit of measurement, Multi-stage DSCP marking and class ID in traffic shapers, Adding traffic shapers to multicast policies, Interface-based traffic shaping with NP acceleration, QoS assignment and rate limiting for FortiSwitch quarantined VLANs, Using extension Internet Service in policy, Allow creation of ISDB objects with regional information, Look up IP address information from the Internet Service Database page, Using FortiSandbox post-transfer scanning with antivirus, Using FortiSandbox inline scanning with antivirus, Using FortiNDR inline scanning with antivirus, Exempt list for files based on individual hash, Configuring web filter profiles with Hebrew domain names, Replacement messages displayed in blocked videos NEW, FortiGuard category-based DNS domain filtering, Applying DNS filter to FortiGate DNS server, Excluding signatures in application control profiles, SSL-based application detection over decrypted traffic in a sandwich topology, Matching multiple parameters on application control signatures, IPS signatures for the industrial security service, Protecting a server running web applications, Handling SSL offloaded traffic from an external decryption device, Redirect to WAD after handshake completion, HTTP/2 support in proxy mode SSL inspection, Define multiple certificates in an SSL profile in replace mode, Disabling the FortiGuard IP address rating, Blocking applications with custom signatures, Application groups in traffic shaping policies, Blocking unwanted IKE negotiations and ESP packets with a local-in policy, Basic site-to-site VPN with pre-shared key, Site-to-site VPN with digital certificate, Site-to-site VPN with overlapping subnets, IKEv2 IPsec site-to-site VPN to an AWS VPN gateway, IPsec VPN to Azure with virtual network gateway, IPSec VPN between a FortiGate and a Cisco ASA with multiple subnets, Add FortiToken multi-factor authentication, Dialup IPsec VPN with certificate authentication, OSPF with IPsec VPN for network redundancy, Packet distribution and redundancy for aggregate IPsec tunnels, Packet distribution for aggregate dial-up IPsec tunnels using location ID, Packet distribution for aggregate static IPsec tunnels in SD-WAN, Packet distribution for aggregate IPsec tunnels using weighted round robin, IPsec VPN wizard hub-and-spoke ADVPN support, Fragmenting IP packets before IPsec encapsulation, Defining gateway IP addresses in IPsec with mode-config and DHCP, Windows IKEv2 native VPN with user certificate, IPsec IKE load balancing based on FortiSASE account information NEW, IPsec SA key retrieval from a KMS server using KMIP NEW, Set up FortiToken multi-factor authentication, Connecting from FortiClient with FortiToken, Showing the SSL VPN portal login page in the browser's language, SSL VPN with LDAP-integrated certificate authentication, SSL VPN for remote users with MFA and user sensitivity, SSL VPN with FortiToken mobile push authentication, SSL VPN with RADIUS on FortiAuthenticator, SSL VPN with RADIUS and FortiToken mobile push on FortiAuthenticator, SSL VPN with RADIUS password renew on FortiAuthenticator, Dynamic address support for SSL VPN policies, Dual stack IPv4 and IPv6 support for SSL VPN, Disable the clipboard in SSL VPN web mode RDP connections, Running a file system check automatically, FortiGuard distribution of updated Apple certificates, Integrate user information from EMS and Exchange connectors in the user store, Enabling Active Directory recursive search, Configuring LDAP dial-in using a member attribute, Configuring least privileges for LDAP admin account authentication in Active Directory, Tracking users in each Active Directory LDAP group, Tracking rolling historical records of LDAP user logins, Configuring client certificate authentication on the LDAP server, Restricting RADIUS user groups to match selective users on the RADIUS server, Support for Okta RADIUS attributes filter-Id and class, Sending multiple RADIUS attribute values in a single RADIUS Access-Request, Traffic shaping based on dynamic RADIUS VSAs, RADIUS Termination-Action AVP in wired and wireless scenarios, Outbound firewall authentication for a SAML user, SSL VPN with FortiAuthenticator as a SAML IdP, Using a browser as an external user-agent for SAML authentication in an SSL VPN connection, Outbound firewall authentication with Azure AD as a SAML IdP, Activating FortiToken Mobile on a mobile phone, Synchronizing LDAP Active Directory users to FortiToken Cloud using the two-factor filter, Enable the FortiToken Cloud free trial directly from the FortiGate NEW, Configuring the maximum log in attempts and lockout period, Using the SAN field for LDAP-integrated certificate authentication, FSSO polling connector agent installation, Configuring the FSSO timeout when the collector agent connection fails, Configuring the FortiGate to act as an 802.1X supplicant, Allowing the FortiGate to override FortiCloud SSO administrator user permissions, Restricting SSH and Telnet jump host capabilities, Remote administrators with TACACS VSA attributes, Upgrading individual device firmware by following the upgrade path (federated update), Upgrading all device firmware by following the upgrade path (federated update), Downloading the EOS support package for supported Fabric devices NEW, Preventing FortiGates with an expired support contract from upgrading to a major or minor firmware release NEW, Setting the administrator password retries and lockout time, Controlling return path with auxiliary session, Configuring the persistency for a banned IP list, Using the default certificate for HTTPS administrative access, Backing up and restoring configurations in multi VDOM mode, Inter-VDOM routing configuration example: Internet access, Inter-VDOM routing configuration example: Partial-mesh VDOMs, Out-of-band management with reserved management interfaces, HA between remote sites over managed FortiSwitches, HA using a hardware switch to replace a physical switch, Override FortiAnalyzer and syslog server settings, Routing NetFlow data over the HA management interface, Force HA failover for testing and demonstrations, Resume IPS scanning of ICCP traffic after HA failover, Querying autoscale clusters for FortiGate VM, Abbreviated TLS handshake after HA failover, Session synchronization during HA failover for ZTNA proxy sessions, FGCP HA between FortiGates of the same model with different AC and DC PSUs NEW, Synchronizing sessions between FGCP clusters, Session synchronization interfaces in FGSP, UTM inspection on asymmetric traffic in FGSP, UTM inspection on asymmetric traffic on L3, Encryption for L3 on asymmetric traffic in FGSP, Optimizing FGSP session synchronization and redundancy, FGSP session synchronization between different FortiGate models or firmware versions, Applying the session synchronization filter only between FGSP peers in an FGCP over FGSP topology, FGCP over FGSP per-tunnel failover for IPsec, Allow IPsec DPD in FGSP members to support failovers, Layer 3 unicast standalone configuration synchronization, Adding IPv4 and IPv6 virtual routers to an interface, SNMP traps and query for monitoring DHCP pool, Configuring a proxy server for FortiGuard updates, Using FortiManager as a local FortiGuard server, FortiAP query to FortiGuard IoT service to determine device details, FortiGate Cloud / FDNcommunication through an explicit proxy, Procuring and importing a signed SSL certificate, FortiGate encryption algorithm cipher suites, Configuring the root FortiGate and downstream FortiGates, Deploying the Security Fabric in a multi-VDOM environment, Synchronizing objects across the Security Fabric, Group address objects synchronized from FortiManager, Leveraging LLDP to simplify Security Fabric negotiation, Configuring the Security Fabric with SAML, Configuring single-sign-on in the Security Fabric, Configuring the root FortiGate as the IdP, Configuring a downstream FortiGate as an SP, Verifying the single-sign-on configuration, Navigating between Security Fabric members with SSO, Integrating FortiAnalyzer management using SAML SSO, Integrating FortiManager management using SAML SSO, Execute a CLI script based on memory and CPU thresholds, Webhook action with Twilio for SMS text messages, Getting started with public and private SDN connectors, Azure SDN connector using service principal, Cisco ACI SDN connector using a standalone connector, Retrieve IPv6 dynamic addresses from Cisco ACI SDN connector, ClearPass endpoint connector via FortiManager, AliCloud Kubernetes SDN connector using access key, AWS Kubernetes (EKS)SDNconnector using access key, Azure Kubernetes (AKS)SDNconnector using client secret, GCP Kubernetes (GKE)SDNconnector using service account, Oracle Kubernetes (OKE) SDNconnector using certificates, Private cloud K8s SDNconnector using secret token, Nuage SDN connector using server credentials, Nutanix SDN connector using server credentials, OpenStack SDN connector using node credentials, VMware ESXi SDNconnector using server credentials, VMware NSX-T Manager SDNconnector using NSX-T Manager credentials, Support for wildcard SDN connectors in filter configurations, Using the AusCERT malicious URL feed with an API key, Monitoring the Security Fabric using FortiExplorer for Apple TV, Adding the root FortiGate to FortiExplorer for Apple TV, Viewing a summary of all connected FortiGates in a Security Fabric, Configuring multiple FortiAnalyzers (or syslog servers) per VDOM, Configuring multiple FortiAnalyzers on a FortiGate in multi-VDOM mode, Log buffer on FortiGates with an SSD disk, Configuring and debugging the free-style filter, Logging the signal-to-noise ratio and signal strength per client, RSSO information for authenticated destination users in logs, Backing up log files or dumping log messages, System and feature operation with WAN optimization, Manual (peer-to-peer) WAN optimization configuration example, Active-passive WAN optimization configuration example, Testing and troubleshooting the configuration, PFand VFSR-IOV driver and virtual SPU support, FIPS cipher mode for AWS, Azure, OCI, and GCP FortiGate-VMs, Troubleshooting CPU and network resources, Verifying routing table contents in NAT mode, Verifying the correct route is being used, Verifying the correct firewall policy is being used, Checking the bridging information in transparent mode, Performing a sniffer trace or packet capture, Displaying detail Hardware NIC information, Identifying the XAUI link used for a specific traffic stream, Troubleshooting process for FortiGuard updates. FortiGate can capture packets matching a firewall policy. Capture the plaintext packets into a text file. Verbose output can be very long. Open the packet capture file using a plain text editor such as Notepad++. Press Enter to send the CLI command to the FortiMail unit, beginning packet capture. Packet capture can also be called a network tap, packet sniffing, or logic analyzing. 3 All of the output from 2, plus the the link layer (Ethernet) header. Once the packet sniffing count is reached, you can end the session and analyze the output in the file. Commands that you would type are highlighted in bold; responses from the Fortinet unit are not in bold. . The level of verbosity as one of:1 - print header of packets2 - print header and data from IP of packets3 - print header and data from Ethernet of packets4 - print header of packets with interface name. Does not display all fields of the IP header; it omits: 2 All of the output from 1, plus the packet payload in both hexadecimal and ASCII. On the server interface, filter port = 67-68, protocol = 17, host = dhcp server IP. 1 diagnose sniffer packet any "icmp" 4 I setup a test ping to the Fortigate whilst the sniffer was running So with the verbose 4 flag I can see the request is coming in on port 2 (The icmp echo request) and the reply is being sent out via port 2. In the output below, port 443 indicates these are HTTPS packets and that 172.20.120.17 is both sending and receiving traffic. Open the converted file in your network protocol analyzer application. To do a sniff, follow the syntax below: # diagnose sniffer packet <interface> <'filter'> <level> <count> <tsformat> Example of network as a filter: First filter: Sniff from two networks. If you are familiar with the TCP protocol, you may notice that the packets are from the middle of a TCP connection. Were using verbosity 3, and we can also see the different hexadecimal representations of the packets themselves. If you configure virtual IP addresses on your FortiGate unit, it will use those addresses in preference to the physical IP addresses. You must select one interface. FortiGate DHCP works with DDNS to allow FQDN connectivity to leased IP addresses Static routing Routing concepts Policy routes Equal cost multi-path Dual internet connections . The following commands will report packets on any interface that are traveling between a computer with the host name of PC1 and a computer with the host name of PC2. The plethora of vendors that resell hardware but have zero engineering knowledge resulting in the wrong hardware or configuration being deployed is a major pet peeve of Michael's. If we want to catch traffic with different packet sizes ( less than or greater than ) we can also use that expression in our packet capture So we can use less than 64 bytes in our example. Similarly, to download the *.pcap file, use the download symbol on the screen. To enter a range, use a dash without spaces. Press Enter. Dit commando wordt gebruikt om verkeersanalyses te maken. =~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2018-03-08.07.25 11:34:40 =~=~=~=~=~=~=~=~=~=~=~=. Methods may vary. Delete the first and last lines, which look like this: Convert the plain text file to a format recognizable by your network protocol analyzer application. Use this command to perform a packet trace on one or more network interfaces. Type the number of packets to capture before stopping. One method is to use a terminal program like puTTY to connect to the FortiGate CLI. Het commando "diagnose sniffer packet" is een zeer uitgebreid diagnose commando, op de commandline van een Fortigate. You can select the filter and start capturing packets. For example, 172.16.1.5-172.16.1.15, or enter a subnet. there are several verbosity levels. The progress bar will indicate the status of the capture. When troubleshooting networks, it helps to look inside the header of the packets. The fgt2eth.pl script is provided as-is, without any implied warranty or technical support, and requires that you first install a Perl module compatible with your operating system. Instantly share code, notes, and snippets. Diagnose sniffer packet. You can also use packet switching to verify that NAT or other configuration is translating addresses or routing traffic the way that you want it to. Enter one or more VLANs (if any). Enter the IP address of one or more hosts. To minimize the performance impact on your, type of service/differentiated services code point (. FGT# diagnose sniffer packet any "host
or host " 4, FGT# diagnose sniffer packet any "(host or host ) and icmp" 4. The general form of the internal FortiOS packet sniffer command is: diagnose sniffer packet . Suitable firewall policies assumed to be in place, of course. On the workstation network, filter port = 67-68, protocol = 17. Fortinet GURU is not owned by or affiliated with, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Reddit (Opens in new window), Check Out The Fortinet Guru Youtube Channel, Office of The CISO Security Training Videos, fortigate How to perform a sniffer trace (CLI and Packet Capture), fortinet How to perform a sniffer trace (CLI and Packet Capture). The capture uses a low level of verbosity (indicated by 1). One method is to use a terminal program like puTTY to connect to the FortiGate CLI. You can also choose any which will capture traffic on all interfaces, Following that, you can filter the traffic. These symbols are the same as those used for audio or video playback. 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.. Enter the number of packets to capture before the filter stops. Packet capture, also known as sniffing, records some or all of the packets seen by a network interface. The following commands will report packets on any interface that are traveling between a computer with the host name of PC1 and a computer with the host name of PC2. none indicates no fil- tering, and all packets will be displayed as the other arguments indicate. How to detect a packet sniffer. The following command is used to trace the packet via CLI: dia sniffer packet 'host x.x.x.x ' . The capture uses a low level of verbosity (indicated by 1). Diagnose sniffer packet examples. This can also be any to sniff all interfaces. diag sniffer packet <interface_name> <'filter'> <verbose> <count> To stop the sniffer, type CTRL+C. Should give you more than what you need. Separate multiple ports with commas. As a result, the packet capture continues until the administrator presses CTRL + C. The sniffer then confirms that five packets were seen by that network interface. Enter a name for the policy and configure the required settings. Scope FortiGate. If you are familiar with the TCP protocol, you might notice that the packets are from the middle of a TCP connection. # diagnose sniffer packet any 'net 1.1.1.0/24 and net 2.2.2.0/24' 4 0 l dia sniffer packet any 'host 8.8.8.8 and !icmp' 4<----- This will omit all the ICMP traffic. If you try capture without a plan to narrow your search, you could end up with too much data to effectively analyze. Solution The following command is used to trace packets. Enter the IP address of one or more hosts. Port(s) Enter one or more ports to capture on the selected interface . Because the filter does not specify either host as the source or destination in the IP header (src or dst), the sniffer captures both forward and reply traffic. Diagnose sniffer packet subnet. FGT# diagnose sniffer packet any "host or host " 4, FGT# diagnose sniffer packet any "(host or host ) and icmp" 4. Open the downloaded PCAP file in a packet analyzer tool, such as Wireshark. Surround the filter string in quotes ('). A large amount of data may scroll by and you will not be able to see it without saving it first. <----- This interface can be set to any or any specific port. Don't use the dhcp server ip as it'll filter out discovery etc on this side. <----- Level can be from 1 - 6. You can see the incoming and the outgoing interface of the packets . On the other hand, you need to capture enough packets to really understand all of the patterns and behavior that you are looking for. Below is a sample output. You must use a third party application, such as Wireshark, to read *,pcap files. Packet sniffing is also known as network tap, packet capture, or logic analyzing. You can also see the filter status and the number of packets captured. 2. net <----- To collect with whole subnet. If you select a filter, you have the option to start and stop packet capture in the edit window, or download the captured packets. As a result, output shown below is truncated after only one packet. The sniffer then confirms that five packets were seen by that network interface. One method is to use a terminal program like PuTTY to connect to the FortiGate CLI. Packet capture is displayed on the CLI, which you may be able to save to a file for later analysis, depending on your CLI client. So here we can see traffic that is coming from that specific source. This can also be "any" to sniff all interfaces. To use packet capture, the FortiGate must have a disk. FGT# diagnose sniffer packet any "host or host or arp" 4. 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. Separate multiple hosts with commas. To use packet capture, the FortiGate must have a disk. The capture uses a low level of verbosity (indicated by 1). 06:55 AM These symbols are the same as those used for audio or video playback. 03-31-2022 Diag sniffer packet fortigate subnet. FortiADC# diagnose sniffer packet port1 'host 192.168..2 or host 192.168..1 and tcp port 80' 1. You will notice this when you are sniffing packets because all the traffic will be using the virtual IP addresses. print header and data from Ethernet of packets, print header of packets with interface name, print header and data from IP of packets with interface name, print header and data from Ethernet of packets with interface name, a: absolute UTC time, yyyy-mm-dd hh:mm:ss.ms, l: absolute LOCAL time, yyyy-mm-dd hh:mm:ss.ms, otherwise: relative to the start of sniffing, ss.ms. we can also catch a range of ports using the keyword portrange and a hyphen between the ports, so lets capture traffic from Port 80, up to Port 443. In verbosity, level two, you have the hex representation of the IP packets. The general form of the internal FortiOS packet sniffer command is: The name of the interface to sniff, such as port1 or internal. Separate multiple ports with commas. Description This article helps to troubleshoot a device that is not receiving an IP address or options, as expected. The following sniffer CLI command includes the ARP protocol in the filter which may be useful to troubleshoot a failure in the ARP resolution (for instance PC2 may be down and not responding to the FortiGate ARP requests). Packet sniffing is also known as network tap, packet capture, or logic analyzing. none indicates no filtering, and all packets are displayed as the other arguments indicate.The filter must be inside single quotes (). Connecting FortiExplorer to a FortiGate via WiFi, Zero touch provisioning with FortiManager, Configuring the root FortiGate and downstream FortiGates, Configuring other Security Fabric devices, Viewing and controlling network risks via topology view, Leveraging LLDP to simplify Security Fabric negotiation, Configuring the Security Fabric with SAML, Configuring single-sign-on in the Security Fabric, Configuring the root FortiGate as the IdP, Configuring a downstream FortiGate as an SP, Verifying the single-sign-on configuration, Navigating between Security Fabric members with SSO, Advanced option - unique SAMLattribute types, OpenStack (Horizon)SDN connector with domain filter, ClearPass endpoint connector via FortiManager, Support for wildcard SDN connectors in filter configurations, External Block List (Threat Feed) Policy, External Block List (Threat Feed) - Authentication, External Block List (Threat Feed)- File Hashes, Execute a CLI script based on CPU and memory thresholds, Viewing a summary of all connected FortiGates in a Security Fabric, Supported views for different log sources, Virtual switch support for FortiGate 300E series, Failure detection for aggregate and redundant interfaces, Restricted SaaS access (Office 365, G Suite, Dropbox), IP address assignment with relay agent information option, Static application steering with a manual strategy, Dynamic application steering with lowest cost and best quality strategies, Per-link controls for policies and SLA checks, DSCP tag-based traffic steering in SD-WAN, SDN dynamic connector addresses in SD-WAN rules, Forward error correction on VPN overlay networks, Controlling traffic with BGP route mapping and service rules, Applying BGP route-map to multiple BGP neighbors, Enable dynamic connector addresses in SD-WAN policies, Configuring the VPN overlay between the HQ FortiGate and cloud FortiGate-VM, Configuring the VPN overlay between the HQ FortiGate and AWS native VPN gateway, Configuring the VIP to access the remote servers, Configuring the SD-WAN to steer traffic between the overlays, Configuring SD-WAN in an HA cluster using internal hardware switches, Associating a FortiToken to an administrator account, Downgrading to a previous firmware version, Setting the administrator password retries and lockout time, Controlling return path with auxiliary session, FGSP (session synchronization) peer setup, Synchronizing sessions between FGCP clusters, Using standalone configuration synchronization, Out-of-band management with reserved management interfaces, HA using a hardware switch to replace a physical switch, FortiGuard third party SSL validation and anycast support, Procure and import a signed SSL certificate, Provision a trusted certificate with Let's Encrypt, NGFW policy mode application default service, Using extension Internet Service in policy, Enabling advanced policy options in the GUI, Recognize anycast addresses in geo-IP blocking, HTTP to HTTPS redirect for load balancing, Use active directory objects directly in policies, FortiGate Cloud / FDNcommunication through an explicit proxy, ClearPass integration for dynamic address objects, Using wildcard FQDN addresses in firewall policies, Changing traffic shaper bandwidth unit of measurement, Type of Service-based prioritization and policy-based traffic shaping, QoS assignment and rate limiting for quarantined VLANs, Content disarm and reconstruction for antivirus, FortiGuard outbreak prevention for antivirus, External malware block list for antivirus, Using FortiSandbox appliance with antivirus, How to configure and apply a DNS filter profile, FortiGuard category-based DNS domain filtering, Protecting a server running web applications, Inspection mode differences for antivirus, Inspection mode differences for data leak prevention, Inspection mode differences for email filter, Inspection mode differences for web filter, Blocking unwanted IKE negotiations and ESP packets with a local-in policy, Basic site-to-site VPN with pre-shared key, Site-to-site VPN with digital certificate, Site-to-site VPN with overlapping subnets, IKEv2 IPsec site-to-site VPN to an AWS VPN gateway, IPsec VPN to Azure with virtual network gateway, IPSec VPN between a FortiGate and a Cisco ASA with multiple subnets, Add FortiToken multi-factor authentication, Dialup IPsec VPN with certificate authentication, OSPF with IPsec VPN for network redundancy, IPsec aggregate for redundancy and traffic load-balancing, Per packet distribution and tunnel aggregation, Hub-spoke OCVPN with inter-overlay source NAT, IPsec VPN wizard hub-and-spoke ADVPN support, Fragmenting IP packets before IPsec encapsulation, Set up FortiToken multi-factor authentication, Connecting from FortiClient with FortiToken, SSL VPN with LDAP-integrated certificate authentication, SSL VPN for remote users with MFA and user case sensitivity, SSL VPN with FortiToken mobile push authentication, SSL VPN with RADIUS on FortiAuthenticator, SSL VPN with RADIUS and FortiToken mobile push on FortiAuthenticator, SSL VPN with RADIUS password renew on FortiAuthenticator, Dynamic address support for SSL VPN policies, Running a file system check automatically, FortiGuard distribution of updated Apple certificates, FSSO polling connector agent installation, Enabling Active Directory recursive search, Configuring LDAP dial-in using a member attribute, Configuring least privileges for LDAP admin account authentication in Active Directory, Activating FortiToken Mobile on a Mobile Phone, Configuring the maximum log in attempts and lockout period, FortiLink auto network configuration policy, Standalone FortiGate as switch controller, Multiple FortiSwitches managed via hardware/software switch, Multiple FortiSwitches in tiers via aggregate interface with redundant link enabled, Multiple FortiSwitches in tiers via aggregate interface with MCLAG enabled only on distribution, HA (A-P) mode FortiGate pairs as switch controller, Multiple FortiSwitches in tiers via aggregate interface with MCLAG enabled on all tiers, MAC layer control - Sticky MAC and MAC Learning-limit, Dynamic VLAN name assignment from RADIUS attribute, Supported log types to FortiAnalyzer, FortiAnalyzer Cloud, FortiGate Cloud, and syslog, Configuring multiple FortiAnalyzers on a multi-VDOM FortiGate, Configuring multiple FortiAnalyzers (or syslog servers) per VDOM, Backing up log files or dumping log messages, Troubleshooting CPU and network resources, Verifying routing table contents in NAT mode, Verifying the correct route is being used, Verifying the correct firewall policy is being used, Checking the bridging information in transparent mode, Performing a sniffer trace (CLI and packet capture), Displaying detail Hardware NIC information, Troubleshooting process for FortiGuard updates.