Ubuntu home server network not working after update

TechMinerUK · 2 Jun 2016 at 21:09

Hi everyone, yesterday I updated the home server via webmin and since then I haven't been able to get any network connection on my server. It can identify the network adapter and no settings appear to have changed but it refuses to receive/send any data.

Does anyone have any ideas on what may have caused this and how I should go about fixing it?

lamboman · 2 Jun 2016 at 22:29

Hardware? Ubuntu release? Network adaptor kernel module version? Network adaptor?

Steveocee · 3 Jun 2016 at 01:31

SSH into it and do an ifconfig from the command line.

It's because Webmin sets the network addresses and such but doesn't do it right. You're better manually editing /etc/network/interfaces and leaving webmin alone when it comes to IP configuration.

TechMinerUK · 3 Jun 2016 at 08:11

lamboman said:
Hardware? Ubuntu release? Network adaptor kernel module version? Network adaptor?

Ubuntu is 16.04 LTS
Network card is an Intel I217-LM
No idea what the kernel module version is

Steveocee said:
SSH into it and do an ifconfig from the command line.
It's because Webmin sets the network addresses and such but doesn't do it right. You're better manually editing /etc/network/interfaces and leaving webmin alone when it comes to IP configuration.

It won't even connect to the router for me to SSH into it

TechMinerUK · 3 Jun 2016 at 08:55

EDIT: Fixed, someone unplugged the powerline connector causing them to reset/unlink :mad:

Steveocee · 3 Jun 2016 at 08:58

TechMinerUK said:
EDIT: Fixed, someone unplugged the powerline connector causing them to reset/unlink

LOL at least it was something easy.

Do be aware though, I have the same setup (Webmin over Ubuntu server). I've stopped making network interface changes over webmin because it kept screwing up the config files and bringing no interfaces up.
A valid work around to that is using the cli on the box itself (not SSH like I said) to edit the interfaces config page.

Probably not too much of a consideration for you if the connection in is over powerline but have you looked at Ubuntu's built in ling aggregation / bonding? It's incredibly easy and satisfying

TechMinerUK · 3 Jun 2016 at 09:01

Steveocee said:
LOL at least it was something easy.
Do be aware though, I have the same setup (Webmin over Ubuntu server). I've stopped making network interface changes over webmin because it kept screwing up the config files and bringing no interfaces up.
A valid work around to that is using the cli on the box itself (not SSH like I said) to edit the interfaces config page.
Probably not too much of a consideration for you if the connection in is over powerline but have you looked at Ubuntu's built in ling aggregation / bonding? It's incredibly easy and satisfying

I have done on other servers, must admit I only use webmin for updates but any configuration I try to do over SSH as (like you say) it has a nasty habit of borking things