Questions tagged [networking]
Computer networking is the connection two or more computing devices for transmitting and sharing data. The devices use common communication protocols over a physical or wireless connection. Use this tag for questions about managing and using network connectivity on an Ubuntu system.
23,004
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Reset DHCP IPs to beginning of range
Kind of a silly question, but I'm just curious as to how you'd reset the DHCP range of your server back to the beginning of it's designation. I've tried restarting the DHCP service, but to no avail.
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Ubuntu linking two wireless networks and sharing internet connexion
I must at first say that I'm a total noob regarding networking.
I have two wifi adapters (wlan0 and wlan1).
wlan0 is connected to a wireless router that is not connected to internet.
wlan1 (a long ...
2
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1
answer
139
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Ubuntu 14.10 Wifi drops to 0 B/s
I have Ubuntu 14.10 installed and if I connect to a network (with Wifi) first everything works great with good transferring rates. However after some time (few minutes, sometimes longer) the ...
2
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1
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Can't mount samba shares
I'm trying to setup some samba shares in 14.04. After defining the shares, I can connect and also list the defined shares, but when I try to mount a share, I get the error: NT_STATUS_ACCESS_DENIED (...
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Basic Network Routing Question
I guess this is a very basic (dumb) question about routing. If I specify a route do I need to worry about a return path or does that also need to be specified?
For example I have a WiFi hotspot on ...
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Dnsmasq and Iptables for routing
I'm using a Raspberry Pi with two ethernet ports as a router. The network looks like this.
"Internet" <--(…)--> Fritz!Box <--(172.16.x.y)--> [eth1, dhcp] Raspberry Pi [eth0, static] <--...
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Ethernet Problems - Realtek RTL8101E/RTL8102E
This problem has been going on for a few months now. After failed troubleshooting (time and again), I'm finally giving in, and asking you for help. I would like to prefix this by saying that Ubuntu is ...
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2
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394
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beyond MAC address spoofing
Saturday, I am going to have to attempt to connect my notebook to a network that does not like me much. It is a school network. I work there as a volunteer, but don't have a sysadmin to explain what ...
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549
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Ubuntu MATE 14.04 LTSP Problems
I've come across a problem where I have gone through a read-me verbatim, and although it works fine, every time I reboot my system (Virtualbox in this matter), the IP address changes even though I ...
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2
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How to know if the router is internet access when connecting via wireless
In windows when you are connecting via wireless it's tell you if their is internet access or no. in ubuntu i already connect to router but i don't know if the router is connect to internet or not?!
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Configure connection sharing with specific IP Address
Edit - a more concise version of the question:
When using connection sharing, I want network manager to use the 192.168.254 subnet instead of the 10.42.0 subnet. Is this possible?
Background:
I ...
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1
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151
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Internet Connected but cannot visit websites
My laptop is Elitebook 745 G2 running Ubuntu 14.04, new installed. It has dual OS: Ubuntu and Windows. The internet service works well in Windows, but cannot work in Ubuntu, though it is connected and ...
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What is the relationship between sockets and ports?
I am trying to understand the relationship between sockets and ports. I found that a socket is part of a port and it handles communication for that port. However, on another blog I read
Os does not ...
3
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0
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Share internet from PC to unrooted android smart phone connected via USB cable
I am running Ubuntu 14.04 LTS with Windows 7 Dual boot (both 32 bit) in my desktop. I use cable broadband (Ethernet). I have an unrooted android smart phone running KitKat 4.4.2. This device has a ...
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2k
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KVM Bridging - Network connection fails if I change Device model to VirtIO from rtl8139
I'm setting up my first VM and am using bridging to access my network. It's a Windows7 VM on Ubuntu 14.10. I read that changing to 'Device Model = VirtIO' in the definition of the VM will improve ...
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USB stick breaks the network access
Recently I've got a brand new Sandisk Extreme usb stick. It contains a NTFS file system and a encrypted NTFS folder that I can read/write on a Windows machine without issues. But when I plug it into ...
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144
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configure networkmanager to share internet
I am connected to a WiFi Network with my laptop, now I would like to connect another device at my LAN port, so it can also use the internet connection I got over Wifi
How can I configure this in my ...
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Ubuntu shows "resolving host" but Android is able to instantly access internet on the same network
I am connected to my home wifi network. I have this constant problem with my laptop which runs Ubuntu 14.04 currently. Very often, while accessing the internet, I can see the web pages timing out or ...
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2k
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I cannot connect to WIFI network due to 'missing CA certificate'
I have a Samsung laptop with built-in wifi capabilities but when attempting to connect to my university's wifi I am suddenly unable to do so.
I apparently don't have a CA certificate though I have ...
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1
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How to copy a single same same file in all active ips in LAN
Please suggest me how to copy a single same file to all active IP addresses in LAN, same user and same passwords in all hosts.
2
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0
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790
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Frequent wifi disconnection on ubuntu 14.04 LTS
I have recenty installed ubuntu 14.04 LTS 64 bit. My university provides cyberoam wifi connection. After 5 seconds to 1 minute, internet stops working and then wifi disconnects. I have to disable wifi ...
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How to check Active Linux machines in LAN [closed]
How to check Active Linux machines in LAN.In ubuntu 12.04.
Anyone knows please suggest me.
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2
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Why I can't I telnet to a specific port?
the port 7778 is in listen,
netstat -tulpn
tcp 0 0 127.0.0.1:7778 0.0.0.0:* LISTEN 22776/java
but I can't telnet that port from remote machine while I can telnet other ...
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3k
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Using iptables to redirect all traffic to my localhost
So I've just installed DD-WRT on my router and I wanted to redirect all http requests to my local host located at 192.168.1.50 (port 80) but I'm unable to find any way of doing this.
I've tried doing ...
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2
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No wifi capabilities on Toshiba Satellite A665
I recently got a Satellite A665 from a buddy who was looking to get rid of his stuff. The first thing I did was try to put on Ubuntu 14.04 which went just fine as it has for me in the past. But I ...
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3
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Cannot remotely connect to MySQL
I've got a 3 servers & 1 Windows machine running in a LAN
HTTP server (Apache2, PHP5 & phpmyadmin) - 10.0.0.10
DNS - 10.0.0.1
MySQL - 10.0.0.40
Windows - 10.0.0.157
I've just installed a ...
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1
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1k
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Cannot connect to a Windows pc in a Linux network [closed]
I have a network running here on a Ubuntu server. A DHCP and a DNS server are running. I now have one Windows computer in that network and several computers with Ubuntu installed. I can ping and have ...
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286
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in a public/private network deployment of MAAS + Openstack why does MAAS need to know about the public network?
Mainly to @andreas who wrote the guide MAAS network layouts for the Landscape Autopilot
You state:
MAAS only manages the private network, for which it will setup DNS and DHCP, but it has to know ...
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1
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969
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How to set up an old PC to run a gaming server and have people connect it?
For starters, I am extremely new to the ubuntu community and even with UNIX itself...
I have managed to wipe an old gaming computer, stack it with some ram, install ubuntu desktop 14.04, and from ...
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3
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I deleted my resolv.conf how do I get it back or how do I create it again
I was changing my DHCP IP address to static on my server by
sudo gedit /etc/network/interfaces and managed to edit the file and save it.
I then went to change resolv.conf but then it went blank and ...
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1
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Unable to get wireless internet Qualcomm Atheros QCA6174 802.11ac
I've been looking around for hours to find a driver or a solution to get my wifi working on my new laptop (Acer Aspire V 17 nitro).
But without success.
I have a fresh Ubuntu 14.04 Installed,
This ...
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1
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716
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TP-Link WN822n v3 (RTL8192cu) on Kubuntu 15.04 Beta 2 (linux 3.19.0-10-generic)
i've just installed Kubuntu 15.04 Beta 2 and i'm looking for a way to get the wifi adapter to work. The old ways of installing the driver using dkms don't seem to work anymore because of the newer ...
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Why can't I install software through my working Internet connection?
I have recently installed Ubuntu 12.04 on Dell Vostro 1014. While I was installing the OS, my system was connected to a network via the LAN cable. The network required a proxy for connection. Now when ...
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Help installing the network scanner from a Brother MFC-J6910DW?
The printer driver install and setup is completed and working fine.
(Installed via Brothers install scripts)
The machine is connected to the network on 192.168.1.4 and if I point a web browser to ...
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2
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138
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Can't connect with ethernet. System keeps trying to connect then give up
Recently i did a fresh install of version 14.04 on my desktop. Despite of some problems, everything is working fine. The only thing that i can't get to work is my Ethernet connection.
When i try to ...
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1
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2k
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get mac address of device
I have a scientific instrument, which I am trying to connect via cross over cable. I need to get that device's mac address so that I can configure the communications server.
How can I get the MAC ...
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1
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Automatically load module on system startup
I have a Netgear A6100 USB Wi-Fi adapter connected to my desktop, using the 8812au kernel module.
However, I have to run sudo modprobe 8812au on every system startup.
How can I get Ubuntu to ...
2
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1
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989
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KDE Network Manager Notification Options Not Available
KDE Network Manager is suppose to have notification options for Connection Activated or Deactivated are missing here. I am on Kubuntu 14.04 LTS fully updated. You can see in the picture that some of ...
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1
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Ubuntu doesnt install any driver
the thing is simple...
I have a hp pavilion g4, i used ubuntu for some weeks and then it started to fail.
First of all, the computer started to have problems with my wifi connection.
Because of that, ...
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0
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466
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Implement Catch-all HTTP Server using DNSMASQ
Ubuntu 14.04 | dnsmasq
My goal is to setup a catch-all HTTP server using an Ubuntu 14.04 workstation as DNS resolver. I have installed dnsmasq on my Ubuntu 14.04 OS using apt-get install dnsmasq and ...
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Internet sharing with static mac-addr to IP mapping
I can create a network between my ubuntu 14.04 and another machine by connecting ethernet cable between my ubuntu machine and second machine, and then setting "IPv4" to "share to other computers". ...
3
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3
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5k
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What is the difference between Pinging loopback address and pinging the system's IP address?
What I found was loopback tests whether the TCP/IP suite of our system is working properly or not and pinging our IP makes sure that NIC is working fine. This is okay but I wish to know its working ...
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lshw not showing wireless card
After a long battle with my Netgear WNDA3100v2, I can now see my adapter with the lsusb command, but it is not showing up on the lshw. I did get the Broadcom BCM43xx driver installed successfully, so ...
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Bit Rate issues on ubuntu 12.04 Centrino Advanced-N 6205 wireless card
I'm having some issues with my wireless connection.
I'm using Ubuntu 12.04:
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04....
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Unusual behave - Virus Like
I am facing a very strange behave on my Ubuntu 14.04 LTS box.
I have an IPTV system providing cable TV and Internet through a router. My Ubuntu box is connected to the router and provides file serving ...
6
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3
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908
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Network printer makes noise every time I insert/remove a USB device
I know that I've encountered an answer to this question before, but I can't seem to figure out the right search terms to find the answer anywhere.
I have an Epson WF4630 at my office and an Epson 845 ...
0
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1
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55
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Can't connec to the Internet [closed]
I just installed xubuntu 14.04. I'm using a VPN on my host machine. I can't connect to the internet either with the VPN on or off. I tried pinging a public IP address with no luck. I have stopped and ...
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473
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Changing wifi username
My pupils are supposed to log on to the school wifi using individual usernames/passwords. Is there any way of not storing the usernames of previous users? Currently they have to edit connections, ...
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System Monitor -Network History shows activity when internet not being used
I noticed that the system monitor's network history shows activity when I am connected to the wifi, even when I am not using my browser. Is there a way I could see which applications are using the ...
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532
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Internet connectivity does not work in Ubuntu Server 14.04 on Windows 8 VirtualBox host
I have a PC with Windows 8, with Oracle VirtualBox installed on it. In the File>Preferences>Network menu in VirtualBox, I have created three host-only networks:
Host-only network 1 - 10.10.10.1
Host-...