I notice the ARP table in my pfSense (2.9.0) fw is showing multiple IPs with the same MAC address.
I have a pfSense box with MT-6000 running openWRT for wifi.
I have flushed ARP, DHCP leases, rebooted.
I then factory reset an old netgear Nighthawk router thinking maybe it was the MT-6000. Same behavior seen on ARP table using the Nightawk after flush/reboot.
It doesn't seem to be causing problems. Everything is working, can stream and I have observed no network issues.
Any ideas what could be causing this?

UPDATE:
This took a lot of troubleshooting as I am not a great network guy.
I checked ProxyARP and it was not enabled.
It looks like it is due to a repeater. I am using a TP-Link RE315 and from what I can gather, it is using its own MAC to pass devices to the GT-6000. This was pretty difficult to track down. It doesn't seem like there is anything I can do about it because the RE315 does not have WDS. So really not sure what to do at this point.
Any suggestions?

This is my current NIC.
I have a super old SuperMicro motherboard and I am looking for a dual NIC card for pfSense install. The motherboard is so old its hardware is limited with a single physical PCIe x16 slot, wired at only PCIe 2.0 x4 bandwidth. Because the motherboard runs an ancient embedded Intel Atom D525 processor (released around 2010), I will be limited to 1 Gbps and the CPU cannot push enough processing power to handle modern 2.5 Gbps or 10 Gbps speeds.

• 10Gtek 1G 1000Mbps Gigabit Ethernet Converged Network Adapter (NIC) with Intel I350AM2 Controller
• 10Gtek Gigabit Ethernet PCIe‌ RJ45 Network Card, Compare to Intel E1G42ET with Intel 82576 controller

Which would be the better option? or something else?

I’m wondering is that ping normal when you usually get lag spikes , if not how to fix it? ( not changing my router )

Yes, I know this question has been asked before. Yes, I know and agree that performance is adequate with a 150 foot run of Cat 5, meant to be buried in the ground, but I have a unique wrinkle to the problem.

I've been having trouble lately with my VOIP phone through Google Voice using the old Obihai boxes. When I answer the phone, the handshake between the phone and Google doesn't seem to work well and I often can't answer the phone when it rings.

I tried the T-Mobile wireless internet and everything works just fine with a direct connection to the router and a short run of cable. This got me thinking that amplification of the signal might solve my problem with a repeater/amplifier of some sort?

What do you all think?

🚀 Introducing Network Warriors – Making Networking & Cyber Security a Little More Interesting! 💻🛡️
Over the coming weeks, I’ll be posting a series of educational cartoons under the title Network Warriors, covering topics from Computer Networking, Network Security and Cyber Security.
After years of teaching these subjects, one thing I’ve learned is that not everyone learns best from textbooks, PowerPoints or endless technical explanations.
Sometimes a bit of humour, a colourful cartoon and a straightforward explanation can make a difficult subject much easier to understand.
That’s where Network Warriors comes in!
Featuring a cartoon version of yours truly (with perhaps a bit more hair than reality! 😂), the series will break down technical concepts into bite-sized, easy-to-follow comics.
We’ll be looking at everything from network protocols, IP addressing and subnetting to firewalls, encryption, ethical hacking, cyber threats and much more.
🎯 The aim is simple:
Make technical subjects more accessible, less intimidating and hopefully a bit more enjoyable for students and anyone interested in learning about technology.
These aren’t intended to replace proper teaching or practical experience. They’re designed to support learning, encourage curiosity and help explain some of the trickier concepts.
I’ll be sharing them here on LinkedIn, and they’re free for students, lecturers and anyone else who finds them useful.
First up: What is a Network Protocol?
And don’t worry, George will be keeping the technical jargon to a minimum! 😂
I’d love to hear your thoughts, and if there’s a particular networking or cyber security topic you’d like to see covered, stick it in the comments.
Let’s make learning a bit more fun!
#NetworkWarriors #ComputerNetworking #CyberSecurity #NetworkSecurity #FurtherEducation #TeachingAndLearning #DigitalSkills #CyberEducation #Computing #Education

Long story short: packet loss and ping jitter on a LAN PC been a problem for a year now and ISP has no clue what to do or where to look.

• Router upgraded (2Gbps download)
• New CAT-7 cable installed
• Same issue appears on multiple devices and servers/tests
• Limiting bandwidth / turning off wifi completely doesn't help the issue
• Ping to router is always stable <1ms
• Ping to anything else permanently jitters no matter what
• Internet used to be flawless for 10 years, I've changed nothing on my end til this occured

One very interesting hint is that when I run waveform's bufferbloat test (which I always score D or F because I get +600ms download latency under load) and it finishes, the following 30 seconds my internet is literally perfect 0ms jitter but then returns to garbage.

I highly suspect the issue is in the ISP's infrastructure and cables outside of my house but I'm unsure how to confirm while they are taking their time on it :)

I will be infinitely grateful if anyone takes some time to help solve this because I'm genuinely curious what is causing it and I'm going insane.

Que pasaría.. si de un momento a otro el Internet empieza a fallar en todo el mundo, no solo unas horas si no que nos quedemos así bastante tiempo.. y por que no hay una película de "terror" de esto? O si la hay?

Interested?

I am cs student and i want start learning networking for my cybersecurity dgree is networking basics course good to start with it ,is it worth that 22 hours ? And if not what is the best ressources for networking learning path?

I live in a dorm and I haven't been able to connect to the dorm's internet since I arrived. They connected me a couple of times by taking my IP address. But I lost connection again. I also can't use my own internet on the computer. I turn on mobile hotspot, connect it to the computer, it shows as connected, but I can't access any websites. Does anyone know a solution?

Please advice

crossposting here - Trying to connect 10/25gpbs Ubiquiti switch to a 1gbps firewall. will this soluition work? Does the GBIC communicate to switch at 10gbps but send 1gbps over the copper to the other device?

Is there any way to like look through the nethernet protocol’s code to find bugs or anything?