NAS drive not being seen by network

debitcardmayhem

You could use nmap on a windows pc from each access point/segment to discover which devices can be seen e.g. in a command prompt (run as admin) enter

nmap -sn 192.168.1.0/24
That shows you which devices can be seen output below (note my ip addresses are on the 192.168.2. range not 192.168.1.

Nmap scan report for router.asus.com (192.168.2.1)
Host is up (0.00s latency).
MAC Address: 38:D5:47:BA:6E:18 (Asustek Computer)
Nmap scan report for 192.168.2.3
Host is up (0.00s latency).
MAC Address: 00:80:77:85:05:34 (Brother industries)
Nmap scan report for 192.168.2.70
Host is up (0.016s latency).
MAC Address: 94:DE:80:7F:34:E7 (Giga-byte Technology)
Nmap scan report for 192.168.2.75
Host is up (0.016s latency).
MAC Address: 94:53:30:15:CE:13 (Hon Hai Precision Ind.)
Nmap scan report for 192.168.2.110
Host is up (0.016s latency).
MAC Address: DC:D3:21:AB:8A:33 (Humax)
Nmap scan report for 192.168.2.111
Host is up (0.00s latency).
MAC Address: 00:24:A5:55:F6:A3 (Buffalo.inc)
Nmap scan report for 192.168.2.114
Host is up (0.00s latency).
MAC Address: 00:90:A9:A8:E7:CE (Western Digital)
Nmap scan report for 192.168.2.147
Host is up (0.031s latency).
MAC Address: 90:F1:AA:2A:DF:D6 (Samsung Electronics)
Nmap scan report for TENfrom7 (192.168.2.239)
Host is up.
Nmap done: 256 IP addresses (9 hosts up) scanned in 7.78 seconds

debitcardmayhem

Also check the DHCP settings are off , and that the default gateway is the address of your router on the buffalo see pages 114/115 in the manual (pdf) here http://d.buffalo.jp/LS210D/?dst=EU

Imnoexpert_2

To answer a few questions. Sorry if too much information.

I want to run the linkstation from a network point to backup all our family devises.

The network consists of a plusnet router connected by a network cable to a netgear unmanaged switch. From that I have 2 windows 10 pcs (at one time there was a Windows vista pc and a linux laptop as well), a printer (with wireless capacity), a cctv nvr (4 cameras). The router wi fi now has numerous things working from it. (ipads, phones, Now tv boxes, Amazon Fire, Amazon Alexa, Google Home etc). All this worked fine until......

The problem is that when connected to the network point the network and the Linkstation software and router cannot see the device.

If I plug the linkstation wired directly into the router I can see it in the router and manage it and it works.

I did, while it was thus connected (with an ip address in the 192.168.1.251) which is within the range allowed by the router set the IP as fixed. I have also turned off Windows defender temporarily. Then when I move the device back to the network point I can't see it, can't ping it and it doesn't appear in the list on the router.

Unforseen & Toshi
I don't think I have a VLAN but how would I know? If I do how do I get rid of it.

Fwor and Toshi
Have I described my network sufficiently, if not what do you need? I could send the list from the router(is this safe to do in public?)

fwor
If I have two dhcp servers how do I know wher they are and remove one? Doesn't the router control this? There is no server on the network.

How do I check the masks? Where do I find them and what do I do?

I don't have any way of doing anything to the switch as far as I know and as it's worked well for years don't think that's the problem.

debitcardmayhem
I am a bit reluctant to download nmap but will do so. The problem maybe that I won't understand what it is telling me!

My plan - apart from acting on everyone's help is to move the NAS back to the direct plug into the router and note all the settings everywhere, set the ip to static again, do lots of pinging, then move it to a different network point.

The other thing to think about is if my IT savvy son who is in the process of setting up a raspberry pi to host his website has done anything untoward.

Getting a bit frustrated to be honest

Thanks again!

debitcardmayhem

Did you check the dhcp settings on the buffalo see post 13

bsod

too much stuff

why does it need to be plugged into the switch

if router ports have been opened up for the pi, you could be exposing all your data to the internet. upnp may also be over exposing your network.

always on nas's are not the best way of backing up

fwor

Imnoexpert wrote: »

If I have two dhcp servers how do I know wher they are and remove one? Doesn't the router control this? There is no server on the network.

From your description (and assuming your son has not yet added a Pi based web server onto your network) there are only two devices that are likely to be running a DHCP server - the router and the Linkstation itself. As has already been explained, you can check the Linkstation config settings for this.

A Netmask is one of two parameters that you will typically be asked to enter when defining an IP (V4) address, and there are generally two ways of writing them. For example 192.168.1.1 255.255.255.0 is the same as 192.168.1.1/24 - which means that the subnet mask covers the first 24 bits of the address. If you use the same subnet mask throughout your network then generally you won't have any problems at all. If you don't you ~can~ see odd effects.

https://en.wikipedia.org/wiki/Subnetwork

CardinalWolsey

If you want to establish whether you have multiple DHCP servers running on your network, try this tool that can be downloaded from Symantec: https://www.symantec.com/connect/sites/default/files/dhcpfind.zip

But - back to basics. When you plug the NAS in to the switch, are you using the same cable as you are using to plug the NAS in to the router (i.e. check the cable is working)? When plugged in to the switch, do the lights on that network port light up (i.e. check the switch/port is working)? How many ports are there on your switch - is one intended as an uplink port (i.e. check correct ports are being used)?

toshi

Thanks for more information.:) but you don't give a concrete network setup and NAS setup as below, I think I am right, but if something is missing please let me know.

debitcardmayhem wrote: »

Also check the DHCP settings are off , and that the default gateway is the address of your router on the buffalo see pages 114/115 in the manual (pdf) here http://d.buffalo.jp/LS210D/?dst=EU

debitcardmayhem found that this NAS has a build-in DHCP. Then you must have 2 DHCP servers.(ADSL router and the NAS, Just use ADSL router's DHCP server only)

Let's just do what people suggest here, OK, you want to use 192.168.1.251 for the NAS, Go ahead ! I will spoil you here but please understand this completely. (It is a good idea to make a simple configuration sheet and stick this info to your NAS. (Also read the manual !)



Plusnet Router uses 192.168.1.254
https://www.plus.net/help/broadband/router-user-guides/


Use "ipconfig" and "ping" with your windows computer, that is only you needed. Please make sure your network connection with ping command, then you might find a dead network port as well.

I have explained setup a static IP address for a printer, The concept is the same, (you setup a NAS, instead of a printer here) please have a look. (You always run a ping command for the conformation of network connection.) Just do the boring basic thing first. :cool:

https://forums.moneysavingexpert.com/discussion/5773169

It seems 2 DHCP servers messed up your devices such as a printer and a cctv nv? Is it the case ? Then you should have used static IPs for these devices. That would help for your trouble shooting, just pinging to the target device IP to confirm the network connection.

I am so amazed that MSE people here are so knowledgeable, if you are not sure, keep asking question, these guys will help you a lot.

I want you to setup a DLNA server lol

Happy computing !

Imnoexpert_2

Guys I can’t thank you enough for your help and your patience. I now know lots more about this device and networking. You reinforced stuff that I thought I knew and understood and showed me some new things.

After all that the problem was a stupid and simple one. Cardinal Wolsley solved it. I went back to basics and checked the fly lead, then I checked the connections into the machine, and then the connection into the switch. because the switch is a small, home type one it is a mass of cables and tucked away in a difficult to see and get at location. Somehow the connection from the switch was a poor one. I blame the cleaner, or was it when the furniture was moved!

Note to self. Always check the basics first! Second beware confirmation bias. I expected this to be a tricky process and read up about all the problems so when there was one I tried to solve it in the way others had solved theirs.

So apologies. I guess the thread will be helpful to others if they have similar problems. It will also be a lesson to think about hardware and wiring before looking at software.

I feel very foolish and embarassed!


D

debitcardmayhem

[STRIKE]wires crossed[/STRIKE] :cool: