Network Settings

The following tables list the Kraken Network settings.

General

Network Setting	Description/Values
Hostname	The hostname to be assigned to the Kraken. This is a FQDN (Fully Qualified Domain Name), for example, myserver.mycompany.com.
IPv4	When set to On, configures the network to use IPv4 addressing. See the 'IPv4' tab.
IPv6	When set to On, configures the network to use IPv6 addressing. See the 'IPv6' tab.
Default Interface	The default Ethernet interface: Select an available interface from the drop-down list. Note Network Interface names for Ethernet interfaces vary, such as eth0/eth1/… or eno1/eno2/…. "None" or Blank indicates that the default interface is not set. To add customized interface names, as shown in the following example, see User Description under "Interfaces".
Primary DNS	(Optional) Enter the primary DNS server address for your network.
Secondary DNS	(Optional) Enter an alternate DNS server address for your network. The alternate DNS server is used only if the primary server is not responding.
DNS Precedence	Select either IPv4 or IPv6 to specify the priority for DNS resolution. On systems with both IPv6 and IPv4 enabled, if users use HOSTNAMES instead of specifying IP addresses when creating connections, the default behavior is to resolve to IPv6 first if it is available.
Search Domains	(Optional) The search strings to use when attempting to resolve domain names.
NTP Server	If the Network Time Protocol (NTP) is enabled, enter the IP address of the NTP server.
IP Forwarding	Check this checkbox to enable IP forwarding when setting up streams using non-primary interfaces for their input.
SNMP	To enable SNMP (Simple Network Management Protocol) alerts for out-of-band monitoring, toggle this button to On. This tells Kraken to start the SNMP server, in order to query for OS information, such as CPU usage. SNMP alerts are typically used by IT administrators to monitor system health.
Read-Only Community	(SNMP must be enabled) Type in the SNMP community string associated with the SNMP Trap Server. This is the string to use when sending a trap to an SMTP Trap server. For example: "Kraken"
SNMP Trap Servers	(SNMP must be enabled) The SNMP server to send SNMP Traps to. This is an IPv4 or FQDN of an SMTP Trap server listening for traps via SNMP. For example: SNMP1.mycompany.com

Interfaces

Network Setting	Description/Values
User Description	(Optional) Enter a customized name for the network interfaces. This description appears beside the interface names on the Default Interface drop-down list (see above), as well as the Network Interface drop-down lists on the Input and Output creation pages.
eth0 \| eth1 \| eth2 \| ...	Allows for multiple interfaces. Select the appropriate tab to view and configure. Note Depending upon your device, the network interface prefixes may differ.

IPv4

Network Setting	Description/Values
Addressing	Select DHCP or Static to enable or disable the Dynamic Host Configuration Protocol (i.e. to use a static or dynamic IP address). Options are: None: Select to disable the interface. Static: Select to disable DHCP (Dynamic Host Configuration Protocol). When DHCP is disabled, you must manually enter the IP address and subnet mask. DHCP: Select to enable DHCP. When DNCP is enabled, Kraken will get an IP address from a DHCP server on the network.
IP Address	Displays the IP Address for the Kraken appliance. This is a unique address that identifies the unit in the IP network. If DHCP is disabled, you may enter an IP address in dotted-decimal format.
Subnet Mask	This is a 32-bit subnet mask used to divide an IP address into subnets and specify the network's available hosts. If DHCP is disabled, you may enter the Network Mask in dotted-decimal format (e.g., 255.255.0.0).
Gateway	Displays the gateway address of the network (typically the address of the network router).This is the gateway that is used when no other route matches. This address must be reachable on your local subnet. If DHCP is disabled, you may enter a gateway address in dotted-decimal format.
MTU	(Maximum Transmission Unit) Specifies the maximum allowed size of IP packets for the outgoing data stream.
MAC Address	(Read-only) The Media Access Control address assigned to the interface. This is the physical address of the network interface and cannot be changed.
Link	Determines whether the Ethernet parameters are set automatically or manually (i.e., enables or disables autonegotiation): Auto: The system will match the Ethernet Speed and Duplex Mode to the Ethernet hub to which it is connecting: Manual: These values must be set manually. See following settings. Note Always use Auto with Gigabit Ethernet (GigE) speed (1000 Mbps).

IPv6

Network Setting	Description/Values
Addressing	Select one of the following options to obtain an IPv6 address for the unit: Automatic: Uses SLAAC (Stateless Address Autoconfiguration) to obtain IP addresses automatically without the need for a DHCP server Automatic (DHCP): Enables the Dynamic Host Configuration Protocol to get an IP address from a DHCP server on the network Static: Use to manually configure the device’s IP and gateway addresses
Global IPv6 Address	If Automatic addressing is used, displays the IPv6 address (with a `/128` suffix). This is a unique address that identifies the unit in the IP network. If Static addressing is used, enter an IPv6 address in hexadecimal notation.
Global Temporary IPv6 Address	If privacy extensions (SLAAC) are being used with Automatic addressing, this field displays the temporary IPv6 address. The temporary address will change in accordance with network changes.
SLAAC Management Address	If Automatic addressing is used, displays the address assigned by SLAAC for management of the unit using the Subnet Prefix and the interfaces MAC address. This is a unique address that identifies the interface/device in the IP network.
Subnet Preflix Length	(Static Addressing only) The Prefix Length in IPv6 is the equivalent of the Subnet Mask in IPv4. However, instead of being expressed in four octets as it is in IPv4, it is expressed as an integer between 1 through 128.
Gateway	If Automatic addressing is used, displays the gateway address of the network (typically the address of the network router). If Static addressing is used, enter a gateway address in hexadecimal notation.
Privacy Extensions	(Automatic Addressing only) Check this checkbox to enable SLAAC Privacy Extensions. As documented in RFC 4941 "Privacy Extensions for Stateless Address Autoconfiguration in IPv6", this entails using randomly generated, temporary, global scope IPv6 addresses that are regularly discarded and replaced with different addresses.
Duplicate Address Detection	Check this checkbox to automatically detect if your Link-Local IPv6 address is a duplicate of one already in use. If so, the Link-Local IPv6 Address changes to a unique address. See RFC 4862 "IPv6 Stateless Address Autoconfiguration" for more details.
Link-Local IPv6 Address	(Read-only) A link-local address is an Internet Protocol (IP) unicast address intended to be used only to connect to the hosts on the same network. A link-local address starts with fe80: and is always automatically assigned.
Accept Redirect Messages	(Disabled by default) Check this checkbox to accept ICMP redirect messages from remote routers. This enables Kraken to use a more direct route for a particular location. Note Because these remote unauthenticated messages modify Kraken’s route table, this capability should only be enabled within trusted environments.

For further IPv6 support details, see IPv4 and IPv6 Support.

Static Routes

Network Setting	Description/Values
Destination	Each static route requires a destination.
Subnet Mask/Prefix Length	This is a 24-bit subnet mask used to divide an IP address into subnets and specify the network's available hosts. Note If DHCP is disabled, you may enter the Network Mask in dotted-decimal format (e.g., 255.255.255.0).
Gateway	This is the gateway that is used when no other gateway matches. This address must be reachable on your local subnet. If DHCP is disabled, you may enter the gateway address in dotted-decimal format.
Interface	The interface associated with the static route. Use the drop-down menu to make your selection.