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I have a network in my workplace and also have a laptop(Ubuntu Desktop 16.04) connected to it by Wi-Fi with the IP address 10.13.0.82. I also have a nanopi-M1 board with Ubuntu-server installed on it. I connected my board via its LAN port. I tried to search the IP addresses with Angry IP scanner from 10.13.0. to 10.13.0.255 but only can find my laptop. Is it possible to find my board?

I have a Yealink telephone in my office uses that network by this IP address too: 172.20.4.65, but when I search this IP or try to connect it by SSH command by my laptop, it can not find it (I attached my board to external LAN port of my phone).

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  • Is it not running Avahi?
    – Ignacio Vazquez-Abrams
    Nov 28, 2017 at 3:44
  • @IgnacioVazquez-Abrams: I don't know what is it?
    – user3486308
    Nov 28, 2017 at 3:49
  • What OS do you have on your laptop? Windows?
    – I say Reinstate Monica
    Nov 28, 2017 at 3:56
  • @TwistyImpersonator: Ubuntu desktop 16.04
    – user3486308
    Nov 28, 2017 at 3:57
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    Sounds like you are in an Enterprise grade network... Your laptop probably is connected to a client isolated WiFi, meaning that subnet is setup so you can't see other devices on it, and the Yealink phone is probably in a subnet (voice VLAN) that isn't routeable to 10.13.0.X IP address. Honestly, you should probably talk to your IT support staff or at least get a better understanding of your network environment.
    – acejavelin
    Nov 28, 2017 at 4:29

2 Answers 2

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Maybe this is not an engineering way but I could find my board in this way:

I searched the IP range of my Yealink phone from 172.20.0.0 to 172.20.4.255 and found all the results from 172.20.0.0 to 172.20.0.255. There were 18 active clients. Then I wrote their number in a paper and connected and this connected my board and searched for few times and found my IP by this TRIAL and ERROR manner!

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  • Based on the IP addresses you are using, it is obvious that the IP is IPv4, so why are you asking to find the IP if you already know it?
    – Ron Maupin
    Nov 28, 2017 at 4:38
  • I didn't know it! I found this range from my phone's status menu! If you like I can DELETE my answer!!
    – user3486308
    Nov 28, 2017 at 4:39
  • Just as a small FYI, if you want, you can accept your own answer.
    – Anaksunaman
    Nov 28, 2017 at 4:40
  • You know that the IP is IPv4, so why are you asking what the IP is? There are only two IPs: IPv4 and IPv6. You were only using IPv4, so that is the IP.
    – Ron Maupin
    Nov 28, 2017 at 4:41
  • @RonMaupin: I am not a network expert! I only wanted to connect my board via SSH and asked this question! I don't know even exactly what IPv4 and IPv6 are
    – user3486308
    Nov 28, 2017 at 4:43
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As you know the board has Ubuntu on it, that would means that so, the easy way is too check in the DHCP server for new leases as Ubuntu tends to enable DHCP client automatically.

Failing that run a port scan for open 22 ports in your network range until you find correct server which is effectively what you did. For that, NMAP is your friend as it can produce a limited list rather than just IP’s found in the network.

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