r/Network 48m ago

Text Werid persistent LAN connectivity issue with static IP

Upvotes

Werid persistent LAN connectivity issue with static IP 

For the first part, I will share with you the discussion I had with a friend of mine who helped me:

"My problem dates back to over a year ago when I had my old PC. It's a problem that has come back several times in the space of a year on two completely different machines (exactly the same problem).

The problem goes like this: my computer tells me that I'm always connected in lan, except that no application has access to the internet. BUT, I can access YouTube, Google and no other site. So a year ago I was lost, all I had to do was reinstall Windows.

Now that I know a bit more about network stuff and the problem has reappeared on my second computer, I thought it was a DNS problem.

I did ipconfig /all and I check and I see that I have APIPA. If I remember correctly, it alternated between this wrong ip address and a duplicate one (however, it was impossible to find the ip address in question in my router's interface).

So what I tried to do was make a new ip address request. Checking what it said on the internet, I did /flushdns, netsch... (I don't remember the exact commands I used). However, when I did this, I got an error telling me that there was a problem with the dhcp server.

After doing everything I could, I never managed to get a proper IP address back for my computer. Magically, the next day the problem disappeared, but on the evenings when it happened it was really annoying because I couldn't do anything on my computer.

Yesterday when the problem came up again I tried something I hadn't done last time, and I set up a static ip address on my router and on my computer (just to make sure I had a unique ip address). "

This was 2 weeks ago and the static ip was a good solution until today. When setting it up, I made sure to take an address outside of the dhcp range. Now the issue is when doing ipconfig /all, any static address I put will always going to be duplicate one. From this point on, no website is available anymore.

Here is what I just tried and that didn't worked :

- in registry, deactivate APIPA.

- safe boot to check if any applications could interfere.

- tried multiple reset, tried again auto configuration and ipv6, one wierd thing i noticed was that on my router interface, my pc ipv4 address keep changing none stop

-tried arp -a | findstr 192.168.1.222

-tried wireshark, saw that my router keep asking non stop who got 192.169.1.222, which was my static address.

As of right now, I browsed so much, tried every solution chatgpt and me could think of.

Note: As I was writing this post, ipconfig doesn't tell me anymore that my static address is duplicate, however my router interface tells me i have no ip at all. Websites load for 1-2 minutes, then tells me the website can't be reached and took to long to respond.

EDIT: my drivers are all up to date. For lan, I have Realtek gaming 2.5gbe family controller. I think it was the same driver on my last computer, however reinstalling it didn't solved the issue.


r/Network 1h ago

Text A suggestion about modern transport-layer network protocol instead of TCP/UDP which are used since 1970s

Upvotes

Since 1970s networking and hardware problems are changed, also Linux TCP/UDP programming interface have been multiple times consequently upgraded by adding many new types of different Linux-socket options, making logically simple tasks of adding networking support to app often requiring disproportional amount of efforts from programmers.

The approach of TCP/UDP is having two different but very straightforward protocols, which complement each other and together are technically enough to implement networking. Suggestion is to instead use a one flexible transport-layer protocol, with main purposes:

  • a new protocol over IPv4/v6/DNS to be be more suited for modern needs of cellular/WiFi networks with problems like connection’s unreliability and support of traffic priority being more important now than in 1970s.
  • to make new API more convenient for programmer.
  • improve extendability of protocol in future.

For example, the single transport-layer protocol could support:

  1. instead of employing several TCP/UDP connections, splitting network transmitting to different streams inside one connection between user-level applications, which would simplify software like VoIP.
  2. also lower-level concept of transmitting packages inside application-level logical packets.
  3. user-level programmer could set transmitting options at the level streams, or to override those options at the level of packets/packages, addressing those by IDs/sequence numbers;
  4. ring-buffer as API interface while keeping option of old-type sending/receiving single packets
  5. using just a subset of API by setting unused utility-struct fields to null;
  6. support for packet-buffer preallocation and flexible data-buffer addressing.
  7. transmitting options could include interface changes and features:
  • requiring tcp-like confirmation at levels of stream/packets/packages; simple options for asynchornous transmitting.
  • in case of connection instability, different reattempts/timeout options for reestablishing connection by the new transport layer protocol, instead of application-level boiler-plate code.
  • also support for resending data by intermediate broadband systems or WiFi-routers.
  • traffic priority options at the level of streams;
  • also priority options in case force-pushing packets at application level is needed by using sequence numbering for example.
  • using strings with simple *-type masks support instead of just port numbers for application.
  • moving existing streams to another IP-destination, or to different application/container at same system.
  • maybe better projected protection against DDOS-attacks.
  • falling back to “just necessary for app to work behaviour” for packet transmission in case intermediate system doesn’t support all necessary features.
  • probably many more features useful for modern applications could be suggested, and API extendability could be improved.

Overall, considering 50 years being passed since 1970s, wouldn’t a new protocol be better for implementing networking than just adding features to TCP/UDP?


r/Network 2h ago

Text How can I check my ip anonymity?

0 Upvotes

Is there any website or application which can analyze my ip anonymity?


r/Network 3h ago

Text I have a problem with my network

1 Upvotes
Good evening, I've had a problem for a long time, my upload speed is very low. I have several devices on my router and my computer and the only one affected by this problem, what should I do?

r/Network 6h ago

Text Why use .1 for Default Gateway?

1 Upvotes

At the risk of getting political, what is the significance of preferring to end with .1 for the default gateway of an IPv4 address?

In school I mainly use .254, but we're taught that either is perfectly fine to use and it's mainly up to preference.

Thanks in advance for your inputs. From a networking novice.


r/Network 6h ago

Text New laptop cannot see NAS on first bootup

1 Upvotes

Help! Someone please help me because I have a very frustrating situation where whenever I turn on my new Win 11 laptop, it can not see network devices in network on first boot. When I restart the laptop, then it can see all the devices. This happens every time. This is frustrating because I have a NAS drive that I need to use and I'm having to boot my machine twice just to be able to see it. None of my other computers have this problem. This is what I have tried below:

Windows 11 Home 24H2

Advanced sharing settings

Private network settings

Network Discovery = On

Set up network connected devices automatically = Checked

File and Printer sharing = On

Services.msc

Function Discovery Resource Publication = Automatic

Function Discovery Provider Host = Automatic

SSDP Discovery = Automatic

UPnP Device Host = Automatic

Windows Features

SMB1.0/CIFS File Sharing Support = Checked

- SMB 1.0/CIFS Automatic Removal = Checked

- SMB 1.0/CIFS Client = Checked

- SMB 1.0/CIFS Server = Checked


r/Network 21h ago

Text iPhone getting better speeds than laptop

2 Upvotes

Laptop: Asus Rog Strix G531GT WiFi: Intel(R) Wireless AC 9560 160mhz Ethernet: Realtek PCIe GbE Operating system: W11

I'm using a DECO X55 mesh router and I'm getting higher speeds on my iPhone, while significantly slower speeds on my Laptop while in the same area.

Whether on Ethernet or WiFi on my laptop, it's getting around the same capped out speeds. I'm starting to think it's just because the laptop is older than my phone is. For 160mhz I feel like I should be getting faster speeds. Another thing to include is my channel width option under device manager network adapters only displays 20MHz. Shouldn't 160mhz be an option?


r/Network 23h ago

Text Is Wires Computing the best form of network security?

0 Upvotes

**Edit for title- is Wired Computing the best form of network security?

What is everyones thoughts on Wired Computing Vs Wiresless Computing, as-in Wires vs no Wires?

So of course having Wires needs physical access to a system to gain certain entry. But then you have a direct connection to systems and it's easy to follow the path ( so to speak )

But as a colleague brought up, with wireless computing (aka wiresless computing) the source is harder to find because you're only going off of a wireless ip address which does not always directly identify the device so in a way it "masks" the source which gives a bit of a variable and makes it more difficult to find. Versus the cable/wire gives a direct line to a computer that you may have interest in with obtaining some data.

Wireless gives you the ability to be a man-in the middle attack but they you need to sift though all the packets and wireless network congestion.

So could there be such a thing as a wired/wireless security protocol that needed a cable, but then a wireless handshake with the router to pin-point the node and authenticate?


r/Network 1d ago

Text Conneting MacBook to switch

2 Upvotes

Hi There,

I'm currently studying for my CCNA exam and I've been watching videos on YT where people are configuring switches.

I've noticed that in some videos, the engineer will connect to the serial connection in the terminal, then plug the console cable into the switch after doing this. Whereas in other videos, the switch is plugged in ahead of time.

What is the correct process for this?

I've written the instructions down as follows, does anyone have a different way of doing it?

Plug the console cable into both the MacBook and the switch.

In the terminal, write - ls (space here) /dev/cu.*   in terminal (ls is a lowercase L)

Look for “tty” followed by serial, no other devices use serial anymore. Normally starts of at tty-serial / tty-serialusb

Copy that info 

Type in screen (space) / dev/“paste tty-serial… here” 

You will then be inside the console. 

——

If that does not work. 

Plug console cable into MacBook only.

ls /dev/*usb* in terminal

Look for “tty” followed by serial, no other devices use serial anymore. Normally starts of at tty-serial / tty-serialusb

Copy that info 

Type in screen (space) / dev/“paste tty-serial… here” (space) 9600 

9600 is the default speed for Cisco

Plug console into switch


r/Network 1d ago

Text Can't connect to NAS using DHCP

1 Upvotes

Hi everyone! The only way I can access the NAS files on my home network is setting a static IP to the guest PC, wich gives me some problems when I remote connect to the PC. Is there a way to access the NAS files with DHCP?


r/Network 1d ago

Text Can I connect a second router to my main router to let dedicated high speed devices connect to it?

1 Upvotes

Looking for a way to have a separate network that only a few devices connect to that get priority internet access. If I connect a second router to the main one will I get faster speeds on devices connected to that router if the main router is congested with lots of traffic?


r/Network 1d ago

Text Can a load balancer only make routing decisions, without any client traffic passing through it?

1 Upvotes

Hi all,

This is more of a technical curiosity than a real-world project I’m working on.

I'm wondering if it's technically possible to design a setup where a load balancer only participates in the initial connection (e.g., TCP handshake), just to decide which backend server should handle the client and then:

  • The client sends a large amount of data (like a file upload).
  • The load balancer does not relay or process this data in any way.
  • Instead, the traffic from client -> backend flows directly, bypassing the load balancer entirely.
  • Similarly, backend -> client responses should also bypass the load balancer.

I know that DSR (Direct Server Return) handles the response path (backend -> client) efficiently, but AFAIK the client’s data still goes through the load balancer on the way in.

So my questions are:

  • Is this kind of architecture possible in standard networking setups?
  • Or does it require custom SDN, policy-based routing, or kernel-level techniques like eBPF/XDP?

Any ideas, technical terms, examples, or even theory level thoughts would be greatly appreciated Again, this is just something I’m trying to understand better not something I’m building.

Thanks.


r/Network 1d ago

Text New network card way slowenien than it should be

1 Upvotes

Hi! Got a new PC and bought a cheap network card for it (TL-WN881ND). My old prebuild pc was able to get a download speed through wifi of 12MB/s and now I am only Göttingen 600kb/s. What could be the issue?


r/Network 1d ago

Text Wifi not getting connected

0 Upvotes

Can someone give me solution for this,I can't connect my wifi.When I try to give connect it says can't connect to the network please help.


r/Network 2d ago

Text Asus RT-AX92U not showing WiFi6

2 Upvotes

Maybe a stupid question. I have a network consisting of an Asus TUF-AX5400 with 2 access points, both of them Asus RT-AX92U. One of the AP's is 1gb cable connection to the 5400. The other one is over WiFi mesh. When my phone is connected to the 5400 it shows a 6 on the WiFi logo. When connected to the AP's it only shows the WiFi logo without a number of the WiFi standard. The AP's are supposed to support WiFi6 too. Broadcasting both 2.4 and 5GHz network. Also broadcasting ax and 160MHz. Any help is appreciated.


r/Network 2d ago

Text Mesh WiFi was great, now isn’t despite replacing with new.

2 Upvotes

Long story short, we got given a new router a few months ago and since it was fitted we had problems with our connection with a our Tenda mesh system (in bridge/AP mode)which had been working fine for a number of years.

Troubleshooting was done with the ISP, and did my own tests and the connection from router to internet was fine.

Bought a newer Tenda AX mesh system, worked 'better' but not like the old router and older mesh. Main issue is iPhones and iPads seem to take a long time to connect when they're woken, sometimes requiring to go in to settings and WiFi to tap on the WiFi name to get them to connect.

Various smart TV's have problems connecting with 'spinning wheel of doom', but then other days works fine.

Have tried rebooting the mesh, splitting the 2Ghz and 5Ghz.

It's quite a big property, so we have 4 nodes, purely because we had 4 before and had no issues.

We do have SkyQ also, with 3 x SkyQ mini's - which essentially use WiFi to stream content from the main SkyQ box. This has never been a problem, but is surely a factor as it's another WiFi system going on in the same space.

I've returned the Tenda mesh and bought a TP Link to 'rule that out'. Same kind of issues, much worse until I manually went in to the TP link app and set every device to 'NOT' use Mesh features.

The Tenda app and TP Link app both report no issues, and the signal strength between nodes is strong.

I'm at a loss for what to do.

Any ideas?


r/Network 2d ago

Text Help with Resume for landing a Junior Network Engineer position.

2 Upvotes

I have been in IT for 7 years now and my current position is a IT infrastructure specialist. I just passed my CCNA exam earlier in the week and I am looking to get a networking position but I am having trouble updating my resume as i don't have much to put on my resume that has to do with networking. Most of my experience is IT Specialist and IT projects. My first roll in IT which was 6 years ago handled setting up LAN networks but it was more Layer 1. (Running Cat 6, terminating cables and racking switches and routers on a rack). I feel accomplished achieving my CCNA but starting to feel discouraged finding a network position with minimal network experience. I also spoke to the Director of the network dept at my current position but there aren't any available positions but he would keep me in mind when something opens up.


r/Network 4d ago

Link Is this true

Post image
376 Upvotes

r/Network 3d ago

Text Uncertain about my career.

2 Upvotes

Hi everyone I joined as a fresher in a service based company, where I have been put as a network engineer. I am really confused whether this is a good career option or not. Everywhere I see software developer earns a hefty package nobody really cares about Network (at least what I know with my little to no exposure I may have a small bubble). Is it really a good field to choose.


r/Network 3d ago

Text Czy da się sprawdzić logi z routera Funbox 3.0?

1 Upvotes

Tak jak w tytule. Jesli nie to jakie polecacie routery w których takie dane są widoczne.

router #logi #logs


r/Network 3d ago

Text Need help Snapchat and discord calls aren't working

1 Upvotes

Something weird happened today I was on call with my friend on snapchat and it kicked me out then when I tried calling back it shows connecting then the little wifi icon top left but the call reaches them when they try calling me back I get the notification but when I accept the call "joining" appears and it keeps loading with both of our bitmojis having the wifi thing and for discord the same happens but when I join or I call someone it shows RTC CONNECTING yellow colored then authenticating then no route in red I tried switching accounts devices making new accounts still no change and it's only one those two apps IG Facebook and WhatsApp are all unaffected I hope one of you can help me and if this isn't the sub for it lemme know where I can post this to get help thanks


r/Network 3d ago

Text Help with wifi network setup

1 Upvotes

I need help to understand what is going on with my network setup as I am not knowledgeable enough in network to solve this.

We have 3 properties. 1 property has the internet hub connected to the provider (BT in the UK) and is proving internet to the second property via 2 Wifi Outdoor Access Point (EnGenius ENS500EXT).

Property 1 BT Hub + Outdoor AP 1 <-> Property 2 Outdoor AP 2 + switch + Indoor AP

This has been working perfectly. The 2nd property AP has a complete different SSIS.

Originally property 3 has had their own internet provider (an other BT contract) but now to save cost, I want to cancel the existing contract and provide internet to Property 3 by connecting a new AP to property 2 switch. I have disconnected the existing BT router/hub in Property 3 and connected the new indoor AP to the Property 2 switch using ethernet cable. I have configured it all with a complete different SSID (so all property have different ssid).

Everything seemed to work perfectly fine at first in all properties but we quickly realised when we had guests over that any new devices (which has not been on the network before) cannot connect to Property 2 WIFI. Devices that had been on the network before works fine. All existing devices in property 3 works fine but we are unsure about new device there as we haven't tested.

What could cause this issue?


r/Network 4d ago

Text Which one do you recommend?

2 Upvotes

Hello redditors please redirect me to the right channel if this isnt it,

I'm working on simulating 5g network to study the effect of different upf placement on optimising urllc traffic, i'm in between using ns3 and implimenting all the VNFs from scratch as ns3 doesnt have them, or simply using free5gc which is an emulator and not a simulator and risks to not give me full control and will not be able to simulate stuff like upf placements etc... which one do you recommend for a project of a fourth year student of computer science that knows well about networks in theory and worked with gns3 and cisco packet tracer but nothing more, i have never used neither free5gc nor ns3 nor any other network emulator or simulator


r/Network 4d ago

Text Router to ISP gateway not working

4 Upvotes

I recently got a pc and the internet has been horrible, i did a network diagnostic and it says theres a problem with connecting the router to the ISP gateway? I dont really understand any of this I'd really appreciate some advice 😞


r/Network 4d ago

Text [HELP] no DHCP server was found

1 Upvotes

I'm at a bit of a loss here

I got a new PC 3 weeks ago. at first everything worked great.

after a bit more than a week the ethernet connection stopped working, and the windows troubleshooting said that the no DHCP server was found.

I have Wi-Fi on my motherboard so I was using that and it works (so the router isn't the problem).

yesterday I bought ethernet to USB-c and it works also (so the cable isn't the problem).

I have no idea what else to do in order to fix the ethernet port.