Bdtyktl

While I order a hp server for my Ubuntu server, I am currently temporarily using my laptop as a server instead. I installed Ubuntu 13.10 and other programs like Webmin, etc, etc while being connected to my router through wi-fi. Additionally, through a wi-fi connection, I have hosted numerous websites, game servers and an ftp server.

The issue is that when I try to connect the laptop to the same router through ethernet, the local ip changes. This means that no services, such as Webmin, work locally or publicly. When I go back to using wi-fi, the issue is solved, however, because the wi-fi connection cannot maintain the traffic to and from the server, I need to use ethernet connection to keep up with the demand.

I have portforwarded the ports I use from my wi-fi local ip to my ethernet local ip but I have no luck so far since the problem is on the local side, not from local to public.

My question is, how can I configure my services to the new IP?

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).



# The loopback network interface

auto lo

iface lo inet loopback



# The primary network interface

#NetworkManager#auto wlan0

#NetworkManager#iface wlan0 inet dhcp

#NetworkManager#        wpa-ssid routername

#NetworkManager#        wpa-psk  routerpassword

The result of ip ad is:

$ ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000

    link/ether 00:1c:23:3a:24:db brd ff:ff:ff:ff:ff:ff

    inet 192.168.***.***/24 brd 192.168.1.255 scope global eth0

       valid_lft forever preferred_lft forever

    inet 192.168.***.***/24 brd 192.168.1.255 scope global secondary eth0

       valid_lft forever preferred_lft forever

    inet6 fe80::21c:23ff:fe3a:24db/64 scope link

       valid_lft forever preferred_lft forever

3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000

    link/ether 00:19:d2:03:0c:f8 brd ff:ff:ff:ff:ff:ff

    inet6 fe80::219:d2ff:fe03:cf8/64 scope link

       valid_lft forever preferred_lft forever



$ ip r

default via 192.168.***.*** dev eth0  proto static

192.168.***.***/24 dev eth0  proto kernel  scope link  src 192.168.***.***  metric 1



$ sudo ethtool eth0

Settings for eth0:

        Supported ports: [ TP ]

        Supported link modes:   10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

                                1000baseT/Half 1000baseT/Full

        Supported pause frame use: No

        Supports auto-negotiation: Yes

        Advertised link modes:  10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

                                1000baseT/Half 1000baseT/Full

        Advertised pause frame use: Symmetric

        Advertised auto-negotiation: Yes

        Link partner advertised link modes:  10baseT/Half 10baseT/Full

                                             100baseT/Half 100baseT/Full

        Link partner advertised pause frame use: Symmetric Receive-only

        Link partner advertised auto-negotiation: Yes

        Speed: 100Mb/s

        Duplex: Full

        Port: Twisted Pair

        PHYAD: 1

        Transceiver: internal

        Auto-negotiation: on

        MDI-X: off

        Supports Wake-on: g

        Wake-on: g

        Current message level: 0x000000ff (255)

                               drv probe link timer ifdown ifup rx_err tx_err

        Link detected: yes

Assuming you need a CLI method:

Use your favourite editor to edit /etc/network/interfaces with root permissions.

sudo nano /etc/network/interfaces

(lines starting with # are just comments, they are not effective, you can leave them as they are, you also keep the lines with lo as they are)

# The loopback network interface

auto lo

iface lo inet loopback



auto eth0

iface eth0 inet static

address 192.168.0.100           # use the address you really want

netmask 255.255.255.0

gateway 192.168.0.254           # use the address of your router

You will have to restart the interface sudo ifdown eth0 (may throw an error, ignore that), then sudo ifup etho - you can check if the settings are effective with ip ad.

For a detailed outline see

Ubuntu Server Guide - chapter networking

There is a special loopback address (127.0.0.1) that always points to your own computer. If you have Webmin (I'm not familiar with this program) listening on port 8080 on your computer, you can just go to 127.0.0.1:8080.

Edit: My bad. I was under the impression that you wanted to access the services from your own computer.

With Ubuntu 18.04 LTS, the infrastructure to set Local IP has shifted to Netplan

Go to this link for details how to configure IP Address with Netplan on Ubuntu 18.04!

Briefly, you need to modify the relevant netplan network configuration file within /etc/netplan/ directory as follows:

network:
ethernets:
enp2s0: #Your network interface
addresses:
- 192.168.0.100/24 #Change to your required IP
dhcp4: false
gateway4: 192.168.1.1
nameservers:
addresses:
- 192.168.1.1
search:
version: 2