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This article describes how to configure an Ethernet Standard or Ethernet Static interface on Sophos UTM 9.000 and above.
This is a typical Ethernet connection, configured with a static IP address, subnet mask, and optionally, a default gateway. This interface type is most commonly used.
This article focuses on a single interface type. To learn more about other interface types, please view article #118899
Known to apply to the following Sophos product(s) and version(s)
Sophos UTM Astaro
Interfaces may be added and edited in the WebAdmin interface under: Interfaces & Routing | Interfaces | Interfaces.
MTU: The default value of 1500 is the standard value for internet traffic. It may be apropriate to change this when connecting to internal networks using jubmo frames, or to ISPs that require smaller MTU values.
Proxy Arp: This should normally be left disabled, though it may be used in special circumstances, to allow hosts on one network to resolve the MAC address of machines on another network.
Displayed max: (Optional) The displayed max value is a numeric field that is used for display purposes only. Entering the correct value in this field to match the available bandwidth provided on this link, allows the UTM to show accurate percentage graphs for each interface on dashboard. This has no impact on network behavior, as it is only used for display purposes.
This interface type was renamed from Ethernet Standard, to Ethernet Static, in Sophos UTM firmware version 9.100
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