Box has no network connectivity and ping gives Destination Host Unreachable

entwere · 06-29-2019, 10:52 AM

Hey, I'm hoping someone could help me as I'm quite new to Ubuntu and Linux in general.

I have Ubuntu box rented and I logged on the other day to discover there were DNS resolution issues so I followed the instructions here; https://stackoverflow.com/questions/...ame-resolution however after this the network did not appear to come back up. When I logged in over KVM, Netplan appears to have reset the /etc/netplan/01-netcfg.yaml. I've got the following information from my host;

Code:

IP	        Gateway	        Subnet	        Custom MAC
199.127.61.221	199.127.61.1	255.255.255.0	-
172.93.101.15	172.93.101.1	255.255.255.0	-

I have the following YAML configuration;

Code:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s25:
      addresses: [ 199.127.61.221/24, 172.93.101.15/24 ]
      gateway4: 199.127.61.1
      nameservers:
        addresses: [ 1.1.1.1, 1.0.0.1 ]
        search: [ dylanw.net ]

Since I can only access the box over KVM, I've got this by flicking between windows so although I've double checked it, it might have some small issues but netplan apply doesn't show any errors.

I can't ping anything, ping 8.8.8.8 gives

Here is the output of some commands; https://imgur.com/a/i2YuUTO

ping google.com gives Temporary failure in name resolution and ping 8.8.8.8 gives Destination Host Unreachable

Sorry if I've left out some important information, I've tried to get what I know will be needed I can give more information if that's needed.

Thanks in advance!

kaushalpatel1982 · 07-01-2019, 12:22 AM

first of all, ping your router 199.127.61.1. If it is pingable then try "traceroute -d 8.8.8.8 ". you will find where the packet is dropping.

You may need to check on router once it is reachable from Ubuntu box :

1. Check routers subnet mask
2. check firewall/ACL configuration on the router
3. check internet access from the router (by pinging 8.8.8.8)

nini09 · 07-12-2019, 02:37 PM

The default route might miss.