![]() There are a few typical use cases for doing this, usually due to needing to maintain a specific/controlled environment for anyone that logs in: The reverse is also true, unless you enable loopback processing (which is a computer setting). If you create a GPO containing only computer settings, and link it to an OU containing only user objects, the effective result is nothing happens. The settings within each of these sections can only be applied to the respective object type. In a GPO, there is two sections: computer configuration, and user configuration. Microsoft Docs is the best place to answer this, but the TL DR is this: it allows you to apply user policy settings to computer objects, or more specifically, any user that logs into a specific computer. I’ve done a bit of untangling misconfigured loopback processing settings in the past, and figured I’d throw something together that documents what I’ve seen and know. ![]() I would still like to know if this is possible, and how to do it using TTCP? If you know the answer to this, please post it.It’s 2021, why am I writing a post about Group Policy? Everyone has retired their AD infrastructure and is using Intune for everything now, right? No? Bueller? Anyway, the topic of Loopback Processing came up a few times recently in the WinAdmins Community, and there always seemed to be some confusion around it. I reviewed the help for IPERF and I think I got it now. It looks like it's trying to connect to itself? I have looked at ways to use TTCP to do the same thing and I have found the -a option, but when I tried to use it I received a Winsock Error on the client side. Can the -B option be used for both the server as well as the client side? What does the syntax look like for the client? UpdateĪs you can see by the answer I posted I have figured out how to do this using IPERF. I was unable to bind the client to the 10.1.1.2 address. Unfortunately I've been only able to use this option to bind the server to the 10.1.1.1 address. There is also the IPERF tool which has the -B option. How do I specify these addresses in TTCP? These are the IP addresses assigned manually to each network adapter. I want 10.1.1.1 to be the server (receiver) and 10.1.1.2 to be the client (transmitter). But why does it say 0.0.0.0? Is it passing through only one of the network adapters? Send Mode : Send Pattern Number of Buffers: 2048 On the transmitter end: C:\PCATTCP-0114>PCATTCP.exe -t 10.1.1.1 PCAUSA Test TCP Utility V2.01.01.14 (IPv4/IPv6) On the receiver end: C:\PCATTCP-0114>pcattcp -r They're giving me hard time because I'm using the same physical PC. I'm trying to do a simple loopback test between the two. ![]() They function as two separate network adapters.
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