Router WAN ports

[plushkinn]

Hello, guys, I finally decided to write here and ask about my problem.

I don't remember how many routers (10+) have been broken (WAN port burned or something), it happens for year or even more. Thanks to shop service that everytime change my router to brand new one.

To the problem: router working fine and in a random time WAN port was turning off and that's all for this router. Good that ASUS ones has setting where you can make LAN port as WAN, and it helps until LAN port got burned as WAN. And it happens only for port where WAN cable was plugged in.

How can I do something about it. I was asking internet provider mechanic, and he said that WAN doesn't connect with electricity at all. So why do those ports were burning one after one, after one...

Please, Help!

[HalGameGuru]

Are they actually burning out? have you inspected the contacts for corrosion? could be the actual chip burning out from having to resend packets too often

[plushkinn]

Idk, I can send some logs from router. How can I check a chip without destroying a warranty. It's less than a week for this router.

[WereCatf]

11 minutes ago, HalGameGuru said:

could be the actual chip burning out from having to resend packets too often

That's not how it works, having to resend packets doesn't burn chips out! Something is injecting voltage into the OP's WAN-port and the ISP should send a technician to check it.

[WereCatf]

30 minutes ago, plushkinn said:

I was asking internet provider mechanic, and he said that WAN doesn't connect with electricity at all.

You should've insisted he come and check it, because if your routers continue to have their WAN-ports burned it means there definitely is something wrong with the lines, something is injecting voltage into them and needs to be fixed. Ports don't just magically burn out without a reason.

[HalGameGuru]

I meant constant traffic could cause it to overheat. We've had issue where routers got burned out when malware was hammering the router from multiple machines

[plushkinn]

hmmm. will the router logs give you some info to discuss?

[plushkinn]

or just call the technician instantly?

[HalGameGuru]

7 minutes ago, WereCatf said:

That's not how it works, having to resend packets doesn't burn chips out! Something is injecting voltage into the OP's WAN-port and the ISP should send a technician to check it.

That assumes what the damage is. We do not know if its the chip, the port, a fuse, a cap, any number of possible failure points. Too much voltage coming in on low voltage wires is but one possibility. One which should actually be caught by the ISP tech. The modem would have to be pumping out that power.

 

 

What kind of ISP is it? cable, DSL, fixed wireless, fiber, etc?

[plushkinn]

direct cable from outside of flat to flat

[WereCatf]

Just now, HalGameGuru said:

The modem would have to be pumping out that power.

No, whatever it is putting the voltage on the lines could be *anything* along the line, including someone having cut too deep into the ground, having nicked the wiring and occasionally making a spark. The ISP's hardware is enterprise-level, professional stuff and has surge-protection even on the Ethernet-lines, so it doesn't get damaged, but anything else connected to those lines could.

[plushkinn]

hmmm... one time he had came to me after one other router was broker and he checked voltages and saying it's OK. nothing was changed since that day. Especially last router was working for 2 months+, and these new one only lasted for less than a week.

[HalGameGuru]

29 minutes ago, WereCatf said:

No, whatever it is putting the voltage on the lines could be *anything* along the line, including someone having cut too deep into the ground, having nicked the wiring and occasionally making a spark. The ISP's hardware is enterprise-level, professional stuff and has surge-protection even on the Ethernet-lines, so it doesn't get damaged, but anything else connected to those lines could.

The signal coming in from the ISP and what is going to the router are different. Depending on the setup. The modem is taking signal from twisted pair, coax, or fiber and turning it into standard ethernet signal. If there is actual bad voltage coming in over the WAN port it is a bad modem, unless it is either a combination modem/router from the ISP, or a bespoke system like FTTH where the entire copper circuit is in the house.

 

EDIT: if you have too much power on the line from the pole or bad wiring going BACK to the ISP it will burn out the modem, not the router.

[2FA]

If you haven't tried using a different cable, try that. Otherwise the ISP employee is full of shit and your modem is outputting bad power levels whether it be voltage or current though if that was the case, wouldn't the RJ45 on the modem burn up as well?

[plushkinn]

it didn't exactly burned and all black like it has been done by fire and temperature, it's just isn't working anymore. Only Lan ports are fine.

[plushkinn]

I called a ISP technician, he'll come soon