r/Network • • 4h ago

Link Is this black stuff normal?

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1 Upvotes

Mummy ml m


r/Network • • 4h ago

Link INTERNET SHARING PROBLEM

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0 Upvotes

how can i fix this ? it’s supposed to be a option to pick what connection to share to but hasn’t shown since the first time i did it


r/Network • • 6h ago

Link Internet Speed 🛜

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1 Upvotes

r/Network • • 7h ago

Text device not showing on admin page despite using ethernet (and possible priority?)

1 Upvotes

I don't know a lot about networks so some things may be weirdly/inaccurately described.

Some time ago issues started for ethernet connection for all my roommates except one (Brad, good with computer stuff). Connection is really slow for us sometimes and we aren't sure why. I've tried logging to modem admin page and all looks good however Brads computer does not show up in device list despite him using the ethernet cable. I've checked the modem and his cable was the only one that had green light on while the rest had yellow ones (i've read that light color indicates quality of the connection?). There are no priority settings on modem settings page, and it's not in bridge mode (Residential Gateway Enabled). Is it possible that Brad is hogging all the internet somehow?

(we are suspicius because he did something before cause firewall changed to maximum from typical)


r/Network • • 2d ago

Link Electrician cut a wire by accident but he "fixed it"

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1.2k Upvotes

r/Network • • 19h ago

Link Your RADIUS shared secret is probably ‘radius123’ and it’s the same on all 400 NAS devices. Let’s fix that this week.

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0 Upvotes

r/Network • • 1d ago

Link My First DIY Home Network. Triplex with 3 Isolated Networks, VLANs, Firewall Rules, PoE & Wi-Fi 6!

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13 Upvotes

r/Network • • 14h ago

Text The internet.

0 Upvotes

Why is the internet not free,the community internet is need if you have a server you install a program then you have a private connection.


r/Network • • 23h ago

Text How do you handle upstream netowrk disputes

0 Upvotes

Hi All,

Yesterday we ran into a packet loss and jitter issue between NTT and Arelion. NTT NOC confirmed it was congestion between them and Arelion and gave a boiler tempalte response about them wanting to work on increasing capacity etc. and if anyone is a client of Arelion to reach out directly. NTT has always been good for us. I came across [https://www.reddit.com/r/networking/comments/1i90gy4/arelion\\_have\\_depeered\\_ntt\\_in\\_europe/\](https://www.reddit.com/r/networking/comments/1i90gy4/arelion_have_depeered_ntt_in_europe/) and that post makes it seem like NTT isn't the one playing nice.

We all know about Cogent not playing nice with HE (and I think at one point Google as well) which is why I wont ever use their service unless they are the only option. Whenever their sales reach out my response is the same "have you worked out your issues with HE yet?". My question/frustration/issue is with an ISP telling you that they are connecting you to the internet when they are not. If I want to use Cogent for v6 then I MUST get another ISP that can get to HE or I don't have full internet routing. In such cases do you just "eat it" and get multiple uplinks or do you put pressure on your upstreams? My clients don't care who is at fault they simply want their internet to work. I am very much against regulation but it's 2026. There should be a standard as to whom is in the Tier1 club and the big boys should be forced to work out their differences.


r/Network • • 1d ago

Text why is putty giving time out error when trying to telnet into my MR1100?

2 Upvotes

When I try to Telnet into my Mr1100 the screens pop-up and I try to enter AT command it gives me timeout error.


r/Network • • 21h ago

Link USB ETHERNET ADAPTER NOT WORKING - no internet access

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0 Upvotes

How do i fix this ? was working the first time then when i turn pc back on my adapter wasn’t working no more . The pc itself is getting internet but i’m tryna internet share to something else and it’s not working.


r/Network • • 1d ago

Text why is putty giving time out error when trying to telnet into my MR1100?

0 Upvotes

r/Network • • 1d ago

Link Forwarded the port, rule looks right, still can't reach the device? Check for CGNAT first

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0 Upvotes

Disclosure: I'm on the marketing team at No-IP. We put together a guide for anyone stuck on this problem, and I'd like to hear how others here handle it. Our solution is No-IP Public Tunnels. Cloudflare Tunnel, Tailscale, ngrok and others use the same outbound model.

One of the most common questions we see: "I forwarded the port, the rule is correct, and it still doesn't work." Usually it comes down to one of these:

  • CGNAT. Your ISP shares one public IP across many customers. No router setting fixes it. It's common on cellular, satellite and a lot of residential fiber.
  • A locked router. ISP combo units that hide or remove the port forwarding page.
  • Double NAT. An ISP gateway sitting in front of your own router.
  • You shouldn't open a port anyway. A client's security baseline or change process rules out inbound rules, or nobody wants to own that rule long term.

Quick CGNAT check: compare the WAN IP on your router's status page with what any "what's my IP" site shows. If they don't match, you're behind carrier NAT. A WAN address in 100.64.0.0/10 gives it away.

The workaround is to flip the direction. Instead of waiting for inbound connections, a client on the device opens an encrypted outbound connection to a tunnel service and keeps it open. Requests come back over that connection. No open port, no router access, no call to the ISP. Outbound traffic is almost always allowed, so this works where inbound doesn't.

Port forwarding is still fine if all three are true: you have a real public IP, you control the router, and someone will maintain the rule. If any of those is a no, a reverse tunnel is the better fit.

A tunnel doesn't replace the basics: put authentication on whatever you expose, keep it patched, and don't post the access URL publicly.

Curious what others are doing:

  1. Has your ISP moved you to CGNAT? What did you switch to?
  2. If you're still port forwarding, how do you keep track of those rules over time?

If you're trying to fix this right now, the full guide walks through how to diagnose which problem you have, how to pick between port forwarding and a tunnel, and where Dynamic DNS fits in: https://blog.noip.com/how-to-get-remote-access-when-your-network-has-no-way-in


r/Network • • 1d ago

Link Dual-ISP BGP: how would you control inbound and outbound traffic?

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1 Upvotes

r/Network • • 1d ago

Link Learning Wireshark as Beginner

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1 Upvotes

r/Network • • 1d ago

Link Network Disconnecting and reconnecting

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2 Upvotes

r/Network • • 1d ago

Text Doubt

0 Upvotes

Hi good afternoon all and hope you are doing well.

Currently I am facing one issue when I ping the ip address of other devices in my terminal it's coming the destination host is unreachable. even with my biometric device (give a static ip) same result. please give any solution, i beginner so i don't have much knowledge. iam using Tp link router.


r/Network • • 1d ago

Link Accounting packets are 95% of your AAA traffic and 100% of your billing disputes. Here’s how to stop both.

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1 Upvotes

r/Network • • 1d ago

Link Potential double NAT/Internet issues

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1 Upvotes

r/Network • • 2d ago

Text NetPulse: a small Android app for live ping, jitter and packet loss (beta, looking for feedback)

2 Upvotes

I've been building NetPulse, a lightweight Android app for checking your network quality. It has a Material 3 interface with light and dark themes.

What works in v0.1.0-beta:

- Live ICMP ping monitor with Start / Stop

- Latency, min / average / max, jitter and packet loss over the last 300 samples

- Only two permissions (INTERNET and ACCESS_NETWORK_STATE), no ads, no analytics, nothing uploaded

What's coming next: a DNS benchmark (Cloudflare, Google, Quad9, Control D) measured separately from ping, latency charts, test history and CSV export.

The app uses the system ping tool, so some phones may block it. That's the main thing I want to find out: does it work on your device? Please tell me your phone brand and Android version, and any bugs or features you'd like to see.

Beta APK: https://github.com/Mireli5656/NetPulse/releases/tag/v0.1.0-beta

Source code: https://github.com/Mireli5656/NetPulse

The beta is signed with a debug key, so uninstall any earlier NetPulse build before installing it.

Thanks for trying it!


r/Network • • 1d ago

Text Performance and other network problems

0 Upvotes

A simple 20-second modem power cycle improves performance and may resolve other problems with all devices regardless their platforms, operating systems, network complexity and regardless how they connected to the network either via Ethernet cable, or wirelessly.

I would recommend to perform a modem power cycle periodically depending on the network volume usage (for example, once a month, or weekly). This way would prevent many problems to occur including completely unexpected ones.

A simple 20-second modem power cycle flushes out hidden memory leaks, speeds up performance, and resolves a wide variety of underlying network problems. This applies to all devices regardless of their platform, operating system, or network complexity—and it works equally well whether your machines are hardwired via an Ethernet cable or connected wirelessly over Wi-Fi.

Instead of waiting for an internet crash or a strange website login error to happen, it is highly effective to treat your gateway like any other computer and maintain it proactively.

Why a Full Power Cycle Works Universally:

  • Shared Core Engine: All data packets (wired and wireless) land in the exact same internal processor. Power-cycling clears memory leaks at the source.
  • NAT Table Optimization: It completely wipes out thousands of stale, dead connection tags accumulated from weeks of browsing, reducing latency.
  • Zero-Latency DNS: It forces the modem to request a fresh, uncorrupted directory map from your internet provider, instantly fixing unexpected connection blocks.
  • Wireless Channel Clean up: Upon reboot, the modem automatically scans the airwaves to select the cleanest, less-congested broadcast channel available.

Recommended Proactive Maintenance Schedule:

  • Weekly Reset: Highly recommended if your household runs heavy daily data volume, multiple computers, or intensive virtual applications like Android emulators.
  • Monthly Reset: A perfect baseline for standard households focused primarily on everyday web browsing, checking weekly accounts, and casual streaming.

Making this quick reset a regular habit based on your network volume completely prevents a massive amount of unexpected network problems from ever forming in the first place.


r/Network • • 2d ago

Link Can this be used as ethernet?

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0 Upvotes

r/Network • • 2d ago

Link Wifi problem (help me)

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0 Upvotes

How to fix it, there is no network even on the Wi-Fi side.


r/Network • • 3d ago

Text Help with NAT for gaming Multiple Machines

4 Upvotes

Hi all

First of all i apologise if this is in the wrong Reddit, please point me in the right direction.

UK here using EE Smart Hub Pro Wifi 7 if anyone else here is familiar with it.

I am having problems gaming with my family due to us all wanting to play the same game but all have a Strict or from a nat checker website Port-Restricted Cone NAT

I want to get Open NAT as we are all unable to play or are having connection issues and drops while trying to host by doing missions on a certain game

My Hub (Router) has uPNP enabled but no luck

I have tried the following to resolve the issue

uPNP

DMZ

Change Windows firewall settings

VPN

As you can tell I'm obviously not that clued up on networking and have been reading its impossible to port forward to multiple machines so what would be the workaround ?

Would another Router be a good solution ? If so would anyone please be able to recommend me one please that would allow more control over multiple machines on the network ?

Any help would be greatly appreciated and help the headaches :)


r/Network • • 3d ago

Link I'm so confused

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5 Upvotes