My main role in Npcap is "developer and maintainer of the code in libpcap that uses the lower-level Npcap code, and that's incorporated into Npcap" I do know some of Npcap's lower-level innards, but I don't regularly work on it, I just look at it as necessary to make libpcap stuff work with it. ![]() If you want an authoritative answer, you should post it as an issue on the Npcap issues list, so that Daniel Miller, the Npcap developer, can answer in more detail. Windows support loopback traffic to 127.0.0.1 even if you don't have Npcap installed the looping back doesn't go through a regular NDIS interface, I think it's special-cased in the IPv4 and IPv6 code.Īll Npcap does is provide a special hook to allow that looped-back traffic to be captured the hook looks like a network adapter from the point of view of the libpcap API, so that programs using that API (which is also the Npcap API) to capture traffic can capture on it the same way it can capture on a regular interface, but that doesn't mean it is a regular interface. Untick Automatic metric, and enter a number as the Interface metric, to order the network adapter. In the properties dialog, select Internet Protocol Version 4 (TCP/IPv4) and then select properties. A loopback adapter is required if you are installing on a non-networked computer to connect the computer to a network after the installation. You're assuming the loopback adapter is a regular Windows network adapter that can have an IP address assigned to it, and that loopback traffic passes through it.Īs far as I know, that's not the case. Right click one of the network adapters you wish to change, and select properties. Wireshark shows interface 'Adaptor for loopback traffic capture', which I assume is npcap, but that interface does not appear in Control Panel > Network Connections, so I cannot set the IP address.Īm I correct that the npcap interface should appear in Control Panel? ![]() ![]() Now the user should be able to see the Npcap Loopback Adapter through the SharpPcap interface. I am running Windand have installed Wireshark 3.4.0 (without npcap) followed by an install of npcap 1.00. Install latest Npcap 0.80 with Support loopback traffic ('Npcap Loopback Adapter' will be created) and Install Npcap in WinPcap API-compatible Mode options both checked.
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