The read-only Interface Name field displays the name of the physical interface you selected.

Enter a user-friendly description of the interface.

Select Layer3.

If you want to export unidirectional IP traffic that traverses an ingress interface to a NetFlow server, select the NetFlow profile or select NetFlow Profile to create a new profile (see Device > Server Profiles > NetFlow). Select None to remove the current NetFlow server assignment from the interface.

Assign a virtual router to the interface, or click Virtual Router to define a new one (see Network > Virtual Routers). Select None to remove the current virtual router assignment from the interface.

If the firewall supports multiple virtual systems and that capability is enabled, select a virtual system (vsys) for the interface or select Virtual System to define a new vsys.

Select a security zone for the interface or select Zone to define a new zone. Select None to remove the current zone assignment from the interface.

Select Enable SD-WAN to enable SD-WAN functionality for the Ethernet interface.

(PA-220, PA-800, and PA-3200 series only) When you enable this option, the firewall forwards Bonjour multicast advertisements and queries received on and forwarded to this interface to all other L3 and AE interfaces and subinterfaces where you enable this option. This helps ensure user access and device discoverability in network environments that use segmentation to route traffic for security or administrative purposes. You can enable this option on up to 16 interfaces.

Add and perform one of the following steps to specify a static IP address and network mask for the interface or AE interface.

You can enter multiple IP addresses for the interface. The forwarding information base (FIB) your system uses determines the maximum number of IP addresses.

Delete an IP address when you no longer need it.

If you selected Enable SD-WAN, enter the IPv4 address of the SD-WAN gateway.

Select Enable to activate the interface for Point-to-Point Protocol over Ethernet (PPPoE) termination. The interface is a PPPoE termination point to support connectivity in a Digital Subscriber Line (DSL) environment where there is a DSL modem but no other PPPoE device to terminate the connection.

Enter the username your ISP provided for the point-to-point connection.

Enter the password and confirm the password.

Select to view information about the PPPoE interface.

Select an authentication method:

Request from the PPPoE server a desired IPv4 address. PPPoE server may assign that address or another address.

Select this option to automatically create a default route that points to the default gateway that the PPPoE server provides.

Enter the default route metric (priority level) for the PPPoE connection (default is 10). A route with a lower number has higher priority during route selection. For example, a route with a metric of 10 is used before a route with a metric of 100.

If your ISP provided the name of an Access Concentrator, enter it. Firewall will connect with this Access Concentrator on the IPS end. This is a string value of 0 to 255 characters.

Firewall (PPPoE client) can provide the desired service request to the PPPoE server. It is a string value of 0 to 255 characters.

Firewall (PPPOE client) waits for the PPPoE server to initiate a connection. If this is not enabled, firewall initiates a connection.

Enable the interface to act as a Dynamic Host Configuration Protocol (DHCP) client and receive a dynamically assigned IP address.

Select this option to cause the firewall to create a static route to a default gateway. The default gateway is useful when clients are trying to access many destinations that don’t need to have routes maintained in a routing table on the firewall.

Select this option to assign a hostname to the DHCP client interface and send that hostname (Option 12) to a DHCP server, which can register the hostname with the DNS server. The DNS server can then automatically manage hostname-to-dynamic IP address resolutions. External hosts can identify the interface by its hostname. The default value indicates system-hostname, which is the firewall hostname that you set in DeviceSetupManagementGeneral Settings. Alternatively, enter a hostname for the interface, which can be a maximum of 64 characters, including uppercase and lowercase letters, numbers, period, hyphen, and underscore.

Enter a default route metric (priority level) for the route between the firewall and the DHCP server (range is 1 to 65,535; there is no default metric). A route with a lower number has higher priority during route selection. For example, a route with a metric of 10 is used before a route with a metric of 100.

Select this option to see all of the settings the client has inherited from its DHCP server, including DHCP lease status, dynamic IP address assignment, subnet mask, gateway, and server settings (DNS, NTP, domain, WINS, NIS, POP3, and SMTP).

Select to enable IPv6 addressing on the interface.

Enter the 64-bit extended unique identifier (EUI-64) in hexadecimal format (for example, 00:26:08:FF:FE:DE:4E:29). If you leave this field blank, the firewall uses the EUI-64 generated from the MAC address of the physical interface. If you enable the Use interface ID as host portion option when adding an address, the firewall uses the interface ID as the host portion of that address.

Add an IPv6 address and prefix length (for example, 2001:400:f00::1/64). Alternatively, select an existing IPv6 address object or create a new IPv6 address object.

Select to enable the IPv6 address on the interface.

Select to use the Interface ID as the host portion of the IPv6 address.

Select to include routing through the nearest node.

Select to enable router advertisement (RA) for this IP address. (You must also enable the global Enable Router Advertisement option on the interface.) For details on RA, see Enable Router Advertisement in this table. The following fields apply only if you Enable Router Advertisement:

Select to enable duplicate address detection (DAD), then configure the DAD Attempts, Reachable Time (sec), and NS Interval.

Specify the number of DAD attempts within the neighbor solicitation interval (NS Interval) before the attempt to identify neighbors fails (range is 1 to 10; default is 1).

Specify the length of time, in seconds, that a neighbor remains reachable after a successful query and response (range is 1 to 36,000; default is 30).

Specify the number of seconds for DAD attempts before failure is indicated (range is 1 to 10; default is 1).

Select to enable Neighbor Discovery Protocol (NDP) monitoring. When enabled, you can select NDP ( in the Features column) to view information about a neighbor the firewall discovered, such as the IPv6 address, the corresponding MAC address, and the User-ID (on a best-case basis).

To provide Neighbor Discovery on IPv6 interfaces, select and configure the other fields in this section. IPv6 DNS clients that receive the router advertisement (RA) messages use this information.

RA enables the firewall to act as a default gateway for IPv6 hosts that are not statically configured and to provide the host with an IPv6 prefix for address configuration. You can use a separate DHCPv6 server in conjunction with this feature to provide DNS and other settings to clients.

This is a global setting for the interface. If you want to set RA options for individual IP addresses, Add and configure an IPv6 address in the IP address table. If you set RA options for any IPv6 address, you must Enable Router Advertisement for the interface.

Specify the minimum interval, in seconds, between RAs that the firewall will send (range is 3 to 1,350; default is 200). The firewall sends RAs at random intervals between the minimum and maximum values you configure.

Specify the maximum interval, in seconds, between RAs that the firewall will send (range is 4 to 1,800; default is 600). The firewall sends RAs at random intervals between the minimum and maximum values you configure.

Specify the hop limit to apply to clients for outgoing packets (range is 1 to 255; default is 64) or select unspecified, which maps to a system default.

Specify the link maximum transmission unit (MTU) to apply to clients (range is 1,280 to 1,500) or default to unspecified, which maps to a system default.

Specify the reachable time (in milliseconds) that the client will use to assume a neighbor is reachable after receiving a reachability confirmation message (range is 0 to 3,600,000) or default to unspecified, which maps to a system default.

Specify the retransmission timer that determines how long the client will wait (in milliseconds) before retransmitting neighbor solicitation messages (range is 0 to 4,294,967,295) or default to unspecified, which maps to a system default.

Specify how long, in seconds, the client will use the firewall as the default gateway (range is 0 to 9,000; default is 1,800). Zero specifies that the firewall is not the default gateway. When the lifetime expires, the client removes the firewall entry from its Default Router List and uses another router as the default gateway.

If the network segment has multiple IPv6 routers, the client uses this field to select a preferred router. Select whether the RA advertises the firewall router as having a High, Medium (default), or Low priority relative to other routers on the segment.

Select to indicate to the client that addresses are available via DHCPv6.

Select to indicate to the client that other address information (for example, DNS-related settings) is available via DHCPv6.

Select if you want the firewall to verify that RAs sent from other routers are advertising consistent information on the link. The firewall logs any inconsistencies in a system log; the type is ipv6nd.

Select for the firewall to send DNS information in NDP router advertisements from this IPv6 Ethernet interface. The other DNS Support fields (Server, Lifetime, Suffix, and Lifetime) are visible only after you select this option.

Add one or more recursive DNS (RDNS) server addresses for the firewall to send in NDP router advertisements from this IPv6 Ethernet interface. RDNS servers send a series of DNS look up requests to root DNS and authoritative DNS servers to ultimately provide an IP address to the DNS client.

You can configure a maximum of eight RDNS Servers that the firewall sends—in order listed from top to bottom—in an NDP router advertisement to the recipient, which then uses them in the same order. Select a server and Move Up or Move Down to change the order of the servers or Delete a server from the list when you no longer need it.

Enter the maximum number of seconds after the IPv6 DNS client receives the router advertisement before the client can use an RDNS server to resolve domain names (range is Max Interval (sec) to twice Max Interval (sec); default is 1,200).

Add one or more domain names (suffixes) for the DNS search list (DNSSL). Maximum length is 255 bytes.

A DNS search list is a list of domain suffixes that a DNS client router appends (one at a time) to an unqualified domain name before it enters the name into a DNS query, thereby using a fully qualified domain name in the query. For example, if a DNS client tries to submit a DNS query for the name “quality” without a suffix, the router appends a period and the first DNS suffix from the DNS search list to the name and transmits the DNS query. If the first DNS suffix on the list is “company.com”, the resulting query from the router is for the fully qualified domain name “quality.company.com”.

If the DNS query fails, the router appends the second DNS suffix from the list to the unqualified name and transmits a new DNS query. The router uses the DNS suffixes until a DNS lookup is successful (ignores the remaining suffixes) or until the router has tried all of suffixes on the list.

Configure the firewall with the suffixes that you want to provide to the DNS client router in a Neighbor Discovery DNSSL option; the DNS client receiving the DNSSL option uses the suffixes in its unqualified DNS queries.

You can configure a maximum of 8 domain names (suffixes) for a DNS search list option that the firewall sends—in order listed from top to bottom—in an NDP router advertisement to the recipient, which uses them in the same order. Select a suffix and Move Up or Move Down to change the order or Delete a suffix when you no longer need it.

Enter the maximum number of seconds after the IPv6 DNS client receives the router advertisement that it can use a domain name (suffix) on the DNS search list (range is the value of Max Interval (sec) to twice Max Interval (sec); default is 1,200).

If you selected Enable SD-WAN on the IPv4 tab, the firewall indicates SD-WAN Interface Status: Enabled. If you didn’t Enable SD-WAN, it indicates Disabled.

Select the SD-WAN Interface Profile to apply to this Ethernet interface or add a new SD-WAN Interface Profile.

If your SD-WAN hub or branch is behind a device that is performing NAT, Enable upstream NAT for the hub or branch.

Select the type of IP address assignment and specify the IP address or FQDN of the public-facing interface on that NAT-performing device, or specify that DDNS derives the address. Thus, Auto VPN can use the address as the tunnel endpoint of the hub or branch.

Select the interface speed in Mbps (10, 100, or 1000) or select auto.

Select whether the interface transmission mode is full-duplex (full), half-duplex (half), or negotiated automatically (auto).

Select whether the interface status is enabled (up), disabled (down), or determined automatically (auto).

Select a Management profile that defines the protocols (for example, SSH, Telnet, and HTTP) you can use to manage the firewall over this interface. Select None to remove the current profile assignment from the interface.

Enter the maximum transmission unit (MTU) in bytes for packets sent on this interface (range is 576 to 9,192; default is 1,500). If machines on either side of the firewall perform Path MTU Discovery (PMTUD) and the interface receives a packet exceeding the MTU, the firewall returns an ICMP fragmentation needed message to the source indicating the packet is too large.

Select to adjust the maximum segment size (MSS) to accommodate bytes for any headers within the interface MTU byte size. The MTU byte size minus the MSS Adjustment Size equals the MSS byte size, which varies by IP protocol:

Use these settings to address the case where a tunnel through the network requires a smaller MSS. If a packet has more bytes than the MSS without fragmentation, this setting enables the adjustment.

Encapsulation adds length to headers so it helps to configure the MSS adjustment size to allow bytes for such things as an MPLS header or tunneled traffic that has a VLAN tag.

Select this option if the corresponding subinterfaces for this interface aren’t tagged.

To add one or more static Address Resolution Protocol (ARP) entries, Add an IP address and its associated hardware [media access control (MAC)] address. To delete an entry, select the entry and click Delete. Static ARP entries reduce ARP processing.

To provide neighbor information for Neighbor Discovery Protocol (NDP), Add the IPv6 address and MAC address of the neighbor.

Enable Neighbor Discovery Protocol (NDP) proxy for the interface. The firewall will respond to ND packets requesting MAC addresses for IPv6 addresses in this list. In the ND response, the firewall sends its own MAC address for the interface so that the firewall will receive the packets meant for the addresses in the list.

It is recommended that you enable NDP proxy if you are using Network Prefix Translation IPv6 (NPTv6).

If you selected Enable NDP Proxy, you can filter numerous Address entries by entering a filter and clicking Apply Filter (gray arrow).

Add one or more IPv6 addresses, IP ranges, IPv6 subnets, or address objects for which the firewall will act as NDP proxy. Ideally, one of these addresses is the same address as that of the source translation in NPTv6. The order of addresses does not matter.

If the address is a subnetwork, the firewall will send an ND response for all addresses in the subnet, so we recommend you also add the IPv6 neighbors of the firewall and then click Negate to instruct the firewall not to respond to these IP addresses.

Negate an address to prevent NDP proxy for that address. You can negate a subset of the specified IP address range or IP subnet.

Enable Link Layer Discovery Protocol (LLDP) for the interface. LLDP functions at the link layer to discover neighboring devices and their capabilities by sending and receiving LLDP data units to and from neighbors.

Select an LLDP Profile or create a new LLDP Profile. The profile is the way in which you configure the LLDP mode, enable syslog and SNMP notifications, and configure the optional Type-Length-Values (TLVs) you want transmitted to LLDP peers.

Select Settings to make the DDNS fields available to configure.

Enable DDNS on the interface. You must initially enable DDNS to configure it. (If your DDNS configuration is unfinished, you can save it without enabling it so that you don’t lose your partial configuration.)

Enter the interval (in days) between updates that the firewall sends to the DDNS server to update IP addresses mapped to FQDNs (range is 1 to 30; default is 1).

Create a Certificate Profile to verify the DDNS service. The DDNS service presents the firewall with a certificate signed by the certificate authority (CA).

Enter a hostname for the interface, which is registered with the DDNS Server (for example, host123.domain123.com, or host123). The firewall does not validate the hostname except to confirm that the syntax uses valid characters allowed by DNS for a domain name.

Select the DDNS vendor (and version) that provides DDNS service to this interface:

The Name and Value fields that follow the vendor name are vendor-specific. The read-only fields notify you of parameters that the firewall uses to connect to the DDNS service. Configure the other fields, such as a password that the DDNS service provides to you and a timeout that the firewall uses if it doesn’t receive a response from the DDNS server.

Add the IPv4 addresses configured on the interface and then select them. You can select only as many IPv4 addresses as the DDNS provider allows. All selected IP addresses are registered with the DDNS provider (Vendor).

Add the IPv6 addresses configured on the interface and then select them. You can select only as many IPv6 addresses as the DDNS provider allows. All selected IP addresses are registered with the DDNS provider (Vendor).