LTS Server Challenges

[vinnywright]

is this server plugged into some thing that serves Internet ,,,router,modem ...?

VINNY

[mhumm2]

Yes, it is. OMG, are we already at the point to check for stupid things? I'm asking in jest -- not trying to be a smart-ass. I remember a company I worked for had a big Xerox printer go inop for no apparent reason. After two days, the tech showed up and after troubleshooting for 5 minutes found the power plug disconnected from the power outlet. It turned out that the cleaning staff unplugged it to clean around it and forgot to plug it back in.

Let's go down the checklist:
* I have an ethernet port that the server recognizes as eno1
-- I know eno1 works because that's what I'm using to ssh into it from my kubuntu computer.
-- I also know it worked when I installed U16.04.2LTS onto the flash drive the server is booting from.
Oh, wait a minute, that's it! The server doesn't have an optical drive so I installed the OS on my kubuntu machine onto the flash drive. The internet connection of the kubuntu machine was used, not the server.

Now what?

[GreyGeek]

I had exactly the same situation, except that my transmit and receive bytes were zero.

Network Manger wouldn't see it but I could manually configure it like you did. Looked like a connection but didn't behave like one. When I bought a cheap USB-eth0 dongle for USB 3 and plugged it in it was immediately recognized and a working connection automatically established. My conclusion was that the thunderstorm the night before blew out my wired connection. It's on the mobo and the only way to fix it is to swap out the mobo. That's when I decided to buy the dongle instead. (I got the USB3 dongle because it supports speeds to 1Gbps, whereas the USB2 dongle only goes to 100Mbps.)

[mhumm2]

I'm glad you got it back up without buying another mobo. In my case, the ethernet port (eno1) works because I've been logging into it for the past 2 weeks with ssh. And of course it's connected to my router or the switch connected to the router. I say or because I've moved it between both connections to see if there was a difference. There wasn't. The lights flash and everything looks like it should work as far as hardware is concerned. I really think it's a config problem. Did you take a look at the applicable outputs above? I don't know what else to check or do.

[GreyGeek]

Here's my current /etc/network/interfaces file

[FONT=monospace][COLOR=#000000]$ cat /etc/network/interfaces[/COLOR]
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address 2001:XXX:XXX:XXX::2
        netmask 64
        endpoint XXX.XXX.XXX.XXX 
        local 192.168.1.100
        ttl 255
        gateway 2001:XXX:XXX:XXX::1
        dns-nameservers 2001:4860:4860::8888 2001:4860:4860::8844
        
[/FONT]

he-ipv6 is my Hurricane IPv6 tunnel.

[mhumm2]

I'm using IPv4, but I do see one difference. your dns-nameservers octets are not separated with periods or are those IPv6 as well? I ask because I do see the Google DNS of 8.8.8.8, and 8.8.4.4 in there. Here's my interfaces file. Please tell me if you see anything wonky!

mark@Ubuntu-Server:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system                                            
# and how to activate them. For more information, see interfaces(5).                                             
# source /etc/network/interfaces.d/*                                                                             
                                                                                                                
# The loopback network interface                                                                                 
                                                                                                                
auto lo                                                                                                          
iface lo inet loopback

# The primary network interface

auto eno1
iface eno1 inet static
address 192.168.1.101
mask 255.255.255.0
gateway 192.168.1.254
dns-nameservers 8.8.8.8 8.8.4.4

# This is an autoconfigured IPv6 interface
iface enp0s10 inet6 auto

[mhumm2]

I added a dns-namedserver to my interfaces file, rebooted and I now have access. Thank you all. Okay, Vinny now I'll update and upgrade.

[GreyGeek]

The address 192.168.1.154 is labeled as your gateway? Some mfgr's use that address to access their config pages. What's your router maker?