networking – How do you prevent a Windows Server 2019 network connection profile with no default gateway from reverting to “Public”

I am bringing up a new site and installing dual homed Windows 2019 RAS/Web servers. The interfaces on the DMZ must have a default gateway defined or they simply don’t work. The “internal” interfaces do not have a default gateway defined and this is fine once systems are attached to a domain controller

But while these systems are stand-alone, rebooting reverts the internal NICs profile to “public”. I, of course, change it back with Set-NetConnectionProfile. But next reboot and we are back where we started.

It is pretty darn annoying since I can no longer RDP to them! I am wondering if anyone has found a simple solution to this behavior.

Not interested in anything convoluted; no registry hacks or the like. As I say, once my domain controllers are up, this will take care of itself. But I deal with this incredibly moronic behavior (hope you are listening, Microsoft) every time I bring up a Windows site.

windows 10 – Networking “does not have a valid IP configuration” – all known solutions exhausted

A lot of people get this error for different reasons, but on 1 particular high-end laptop the error has persisted for a full year, despite trying everything short of reinstalling the OS. It seems like nothing special was happening when the error began, though some network related programs were installed (since removed).

Here’s a list of what has been tried:

  • Restarting
  • Disabling / enabling the network adapters
  • netsh resets and flushing (e.g int tcp reset, int ip reset, flushdns, etc)
  • Reinstalling network/WiFi drivers
  • Changing networks many times to make sure it has nothing to do with the router
  • Manually and automatically setting LAN IP and DNS
  • Uninstalling all 3rd party network related software
  • Network reset all settings (Windows feature)
  • Safe Mode
  • Adding a DHCP related DWORD to the registry that ended in “Toggle” with a value of 1
  • Trying all of this with both Ethernet and WiFi
  • Trying an external WiFi adapter

This is on Windows 10. Even Ping fails to transmit with “general error”.

networking – Identify cat5 and cat5e wiring visually

I have some network cabling running in the house. I wanted to know if they are cat5 or Cat5e. Unfortunately I don’t have access to the part of the wire where it’s written. Mainly I want to run gigabit network, so want to know if they are cat5 or Cat5e. Adding a pic of the termination here. enter image description here

Also visually how do you tell them apart?

networking – What is the proper way to attach a virtual bridge to an already existing KVM guest?

I have this bridge virbr0 tuned with eth0 in my host, and an already running KVM Guest with multiple nics installed on it.

The goal is to make the KVM guest reachable from outside the host, this is why I want to attach it to the network bridge of the host.

I’ve cloned this guest to run some network tests, but I would like to find the proper/cleanest way to attach this guest to my virbr0.

networking – Since UDP multi/broadcast over internet is not possible – how do games that uses UDP over internet send to thousands/millions unique clients?

I am asking from a programming point of view as I struggle to clearly understand the architecture ex online multiplayer games do when they communicate UDP packets over the internet to thousands/millions of players.

I understand that UDP broadcast and multicast is not easily available when its not internal network but across the internet.

The only other way I can see is that you then manually have to loop through each UDP connection and send the same data to each client ( just as you would if you had a lot of TCP clients ) ? is this true ? I have tried to loop through TCP connections this way and at a certain point things go slow and CPU go high.

if no 1 is the only way, then it would mean that client 1 will get things a lot faster than client number 10000 when it gets to this client in the loop ? are there techniques to get around this in any way ?

since we would have to send the same packet of data to each and every client that of course creates A LOT of network traffic but also it would i assume max out the CPU also if we all the time would have to loop through all clients for each little packet we have to send ?

Please note I am specifically talking about UDP in raw form – not interested in Web-socket versions or ‘use TCP instead’ as its the nature of UDP I am trying to understand here and have been reading all weekend here and while I have a fairly good understanding of the packet level of UDP etc. my network technical knowledge is really not good and it does not tend to stick when I try to read non-programming technical articles about networking/routers/switches/ISP support.

So hoping that someone out there could help me understand it with a programming mindset in mind how something like multiplayer games/VOIP/large IOT networks achieve the ‘real-time’ capabilities of UDP if it has to manually process and send packets onto each UDP sockets.

networking – How to auto switch WIFI Router based on internet connectivity?

I have two internet connections at my home, one from Airtel and another from FusionNet. Both ISPs are providing internet via Router. But at random times one of the link is down and devices connected to respective Router are unable to access Internet.

What I want now is a device or something, so that devices can auto connect to the router which has internet connectivity.

Any thought on the same appreciable.

networking – how to make a pc to be connected with another pc directly, while still let it connect to the internet via network cable

I have my pc which is connected into our LAN via a network cable, and through which internet can be visited.

Now one of our teammates has his pc, which has no right to connect to our LAN.

Problem is that my teammate and I are now developing a web application, I build the backend and he build the frontend, and we need to communicate with each other through predefined http RESTful api.

I need to communicate with my teammate, while still can access our LAN. What is the best practise to do so? Both of us are using windows.

I tried to open a 360wifi, which can make my laptop pc to setup a wifi, and my teammate’s laptop can access this wifi can visit the internet. But he cannot visit my backend service by the ip address of my laptop in the LAN network(ping returns error.).

I guess I need two network card, one for our LAN, aonther for my teammate, we can connect with each other via directly network cable connection.

MusicEngine – Music Social Networking

Admin submitted a new resource:

MusicEngine – Music Social Networking – MusicEngine – Music Social Networking

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What if you could get a single platform where you can share your music, reach out to like minded musicians and fans to connect with them? Well, for all established and aspiring musicians…​

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networking – Upgrading home Wi-Fi router to home mesh

I have a router (Xiaomi R3P) in my living room. It gives a decent coverage to my 120m apartment. However a couple of spots are troublesome:

  1. A bed in the master bedroom. The 2.4Ghz reaches it very well, but the 5Ghz there is really poor.
  2. Another room (concrete walls), has very poor signal even for the 2.4Ghz

I want to keep my router and the WiFi capabilities it provides. I want to add devices to reach those areas. I’d like to keep the same SSID and preferably have a mesh solution.

I’ll add I have ethernet cables going to both my master bedroom and the cement room via a couple of switches that the main router is connected to (diagram)

What type of hardware would you suggest, or other solution for getting a coverage in those rooms?

Thanks in advance

networking – Xiaomi Redmi5 Cannot Connect to Phaser 3020 Printer

I am trying to connect Xiaomi Redmi5 with a Phaser 3020 via Wi-Fi Direct. My iOS devices connect just fine. Xerox Printer Services cannot discover the printer. Tried it with the IP of the printer. Did not help. With the Default Printer Service (in Xiaomi called “System printing services” ->Find Wi-Fi Direct printers I reach the point whereby the printer is found judging by the message “add DIRECT-Nv Phaser 3020”. Tapping on it invokes a message Connecting to DIRECT-Nv Phaser 3020 and the printer seems to start crunching for a sec. After that a message appears saying You may need to approve this connection on your printer’s front panel, but the printer has no panel except of 2 buttons (powerOff and WPS button) .Then followed by “Could not connect to DIRECT-Nv Phaser 3020”. Apparently, the approval by the printer failed but I have no clue how to grant that approval. Tried pressing the two buttons in various combinations to no avail. Is there a way to connect this printer with the Redmi5 or they are intrinsically incompatible?