can't ping or nslookup outside the LAN

user182945

6/3/24, 3:26 PM

Ubuntu 18.04 cannot ping or nslookup outside the LAN.

When I do nslookup www.google.comit hangs for a while and returns ;; connection timed out; no servers could be reachedI cannot ping www.google.com but I can ping 10.100.10.1, my gateway. The server is using netplan. When I do a netplan apply, I don't get errors. Here is my netplan config file.

network:
  version: 2
  ethernets:
          ens160:
            dhcp4: no
            dhcp6: no
            addresses: [10.100.10.26/24]
            gateway4: 10.100.10.1
            nameservers:
               addresses: [8.8.8.8, 8.8.4.4]

Here is my resolv.conf:

nameserver 8.8.8.8
nameserver 8.8.4.4

I can't install apps because it cannot resolve DNS.

This is an image from a ESXI implementation. Other images in the network respond to all network requests except this linux client.

1 + 2

networking

ubuntu

linux-networking

vmware-esxi

Nikita Kipriyanov

6/7/24, 7:38 AM

Show not a configuration file but `ip addr` and `ip route` from the running system. Last should display a line similar to `default via 10.100.10.1 dev ens160`; try `ping 10.100.10.1` (or whatever your actual default route is) and see if *that* works.

bjoster

6/16/24, 2:55 PM

And check if there is a firewall blocking your outbound requests.

Score:0

Server

user182945

6/6/24, 6:48 PM

It was related to the firewall, there are two types of NAT that can be figured on the firewall: 1 to 1 with Nat, or 1 to many with NAT.

What worked was 1 to many with NAT.

+ 0

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EN: can't ping or nslookup outside the LAN

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