Managing and using network connectivity on a Ubuntu system

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Wireless automatic disconnection

My wireless connection automatically drops once in a while. Once that happens, I use WICD to reconnect to the wireless network, which shows that it puts down and up wireless interface. I wonder if ...
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1answer
21 views

Ubuntu 14.04.1 Bug - issue with my on-board networking adapter and the ACPI of my computer

This old bug affects me severely, I say old bug because it is very well documented in the following link: Bug report This bug results in two things: My on-board networking doesn't work, and trying ...
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2answers
23 views

Wi-Fi cannot be used, it says it is disabled by a hardware switch (I do not have a disable WiFi hardware switch on my laptop)

I just installed Ubuntu onto my Lenovo Yoga 2 and I cannot turn on or use my WiFi because it says that it is disabled by a hardware switch (I do not have a physial disable WiFi hardware switch on my ...
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9 views

VPN does not connect with nmcli - “Error: Connection activation failed: unknown reason.”

I once set up a bunch of VPN connections with the network manager running with Unity and then switched over to XFCE, which made me use the command line tool nmcli instead to connect with those VPNs. ...
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1answer
8 views

Link-local (zeroconf) networking with multiple hosts/interfaces

I have a machine (hostname foo) with two wired network interfaces, eth0 and eth1. When I connect another host bar to one of them (eth0), I can see in either one's NetworkManager that it's using ...
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Ubuntu 14.04 RT 8723 WIFI adapter not working, SIOCSIFFLAGS: Operation not permitted

I have a Radxa Rock Pro on which I recently flashed the Ubuntu 14.04 image. This image should have the firmware for the RT 8723 already loaded. Because the output of ifconfig -a is: eth0 Link ...
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1answer
19 views

Im copying data from ubuntu to windows. but the folder name is changing automatically

Im copying data from ubuntu to windows. but the folder name is changing automatically. I tried same copy to external drive also. After connecting to windows system the name of folder or file is ...
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1answer
11 views

How to broadcast a folder in network of class B network?

I want my specific folder on every pc which is in common network of my college so how to broadcast that folder is there any command like ssh? please help me fast.
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1answer
40 views

Can private IP address be the same as public IP address?

I checked my public ip address at http://whatismyipaddress.com, it showed me 137.189.34.166. When I typed ifconfig in terminal it showed me my private ip address is 137.189.34.166, too. Does that mean ...
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21 views

Wireless interface become disabled

My internal intel wireless adapter (Intel PRO/Wireless 5100 AGN [Shiloh], and logical name: wlan0) sometimes stops working, and I have to restart Ubuntu so that it will work again. My laptop is ...
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2answers
54 views

Ethernet connection not working after installing Ubuntu 14.04 LTS

EDIT: PROBLEM IS BACK.. I cant figure out a permanent and reliable way around the bug (have managed the bug to go away 2 times) my files keep duplicating themselves with a ~ after their name, so if I ...
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Menu bar networking menu disabled

Roughly every 2 weeks (give or take a few days), my WiFi becomes disconnected and the networking menu becomes disabled. I’ve been experiencing this for a few months now hoping I could track down ...
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35 views

Ethernet not working and wireless is slow

I have a desktop PC that I built that I recently installed Ubuntu 14.04 next to Windows 8.1. It has an Ethernet port on the motherboard (MSI Z97S) and a wireless card in a PCI-Express slot (Asus ...
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13 views

iwconfig all interfaces “no wireless extension”

I installed the new ath10k driver following this procedure : ath10k installation. And afterwards I am not longer able to use iwconfig command. I always get this error : Error for wireless request ...
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0answers
15 views

Gufw log: rejected, denied and allowed connections

I have got Gufw installed, and I have set some firewall rules so that it rejects and allows certain IP addresses. And although I have set it so that it logs-all, I cannot seem to find anywhere where ...
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12 views

All Networking disabled after RAM upgrade [virtual]

After running a rather large script file from the terminal I got a Java memory heap error. So I decided to try increasing the RAM to resolve the problem... However, after upgrading the RAM from 2048 ...
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1answer
34 views

Unable to set proper routing between two networks

Three boxes running three different ubuntu flavours (14.04, 14.10, 15.04). I'm trying to get all of these to talk between themselves, while being on different subnets, and I can't figure how, yet. ...
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Two different Networks, 2xRouter some routing Fail need help!

I have some problems with my Settings, if someone can check it and analyze whats wrong. NETWORKPLAN MY current settings: /etc/network/interfaces Wan auto eth0 iface eth0 inet dhcp LAN auto eth1 ...
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22 views

"How do I find BOOTPROTO information for eth0

Where can i get BOOTPROTO information in ubuntu? File "/etc/NetworkManager/system-connections/Wired connection 1" doesn't contain BOOTPROTO information.
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20 views

configure postfix so emails will send

I am trying to use postfix simply to allow my blog to send emails, I don't need anything fancy like webmail. All I want it to do is send me messages to my gmail or google apps accounts. I've tried ...
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18 views

Manually run sudo dpkg --configure -a [on hold]

Using Mint 17.1. During some install work while in the terminal and a very bad dropping Ethernet connection, the install never finished and I can only assume corrupted some things in Linux. The ...
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14 views

Hostapd wpa_passphrase not working

Hi there I'm setting hostapd to create a wlan from my ubuntu computer. I have configure some conf files following some tutorials/guides and I can detect the wlan. The problems comes when i enter the ...
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32 views

Ubuntu wifi doesnt work

I can't use my wifi as when I click enable wifi it stays disabled. Here's all the info you might need to help me http://pastebin.com/ehLDwDzW
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15 views

Try DHCP first, if it fails assign static address and use the machine as a DHCP server itself

As the title says, I have a tiny screenless Ubuntu server that I move around, that has two different behaviors and needs to adapt automatically, that is, without any human intervention, at bootstrap: ...
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Referanceing venet0:0 and venet0:1 in iptables on OpenVZ

I have an Ubuntu vps that is hosted with openvz. For a while now I have had trouble using the interface names in iptables, such as: (edited) -A INPUT -i venet0:0 -p tcp -m tcp --dport 80 -j ACCEPT ...
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1answer
119 views

unable to edit /etc/hosts file in ubuntu 14.10

I changed the hostname from default name, set during installation to something short and nice, but didn't change it in /etc/hosts file. /etc/hostname is changed after restart but sudo is not working. ...
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25 views

Only allow one random IP access a specific port

I have seen a SOCKS 5 proxy service provider, it provides: Basic package: the same account (corresponding to a specific port) only one terminal at the same time Platinum package:the same account ...
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17 views

Wifi Option is available but it can't be clicked when trying to click

Here I have a problem with my Ubuntu 14.04 that there exist the Enable wifi option but when I'm trying to click on it then it is not responding to my action and it is disabled also there is a problem ...
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1answer
13 views

14.04 Lubuntu install randomly loses wired Internet connection

I recently moved and ever since setting up my desktop, I've had seemingly random losses of my wired connection, although high bandwidth stuff (Netflix, maximizing an HD YouTube video) seems to trigger ...
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28 views

Ubuntu server DNS issue [on hold]

Hello guys I seem to be having issues with my Ubuntu server not being able to sudo apt-get update that it does not pick up on the update files. I have changed the DNS to Google's which allows me to ...
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43 views

Login loop in Ubuntu 14.04 LTS after last updates

After the last Ubuntu 14.04 LTS update, the login was looping a guest account requiring a password though none was created. Someone solved this by creating the 50-no-guest.conf. But now, though my ...
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10 views

Unable to connect to Photon plus Huawei in Ubuntu 14.04 after update

I have been unable to connect to internet using my photon plus Huawei device. I had been using this device earlier without any issues. Maybe some system update or system shutdown without disconnecting ...
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1answer
68 views

Ubuntu 14.04 as router Destination Network unreachable

I am fightning with this for like 10 days now i really need to ask you guys, i hope someone has 5 mins time to explain me what i am doing wrong! For the start i wanted to configurate a router for my ...
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Brother DCP-7065DN, Ubuntu 14.04 64bit: Cannot print to network printer but can use the scan function (via simple scan.)

I have followed all suggestions mentioned in "Brother DCP-7065DN, Ubuntu 14.04 64bit: Can print to network printer but cannot use the scan function." I have the opposite (can/cannot) situation for ...
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0answers
18 views

Set the TCP window scaling option to 4 & the TCP window size to 65535 [on hold]

want that all TCP packet sent by my machine (linux system) should be sent with the TCP window scaling option set to 4 & the TCP window size set to 65535 (0xffff). How I can configuyre my linux ...
4
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1answer
33 views

Automatically connect to internet

I have Ubuntu 14.04 LTS installed on my laptop, I am using 3G USB modem to connect to the internet (sometimes I do not have direct access to this laptop, but I need it to stay online). But every day ...
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0answers
8 views

Why My ZTC Grameenphone internet 3g is mount failed?

My ubuntu version is ubuntu 14.04 lts. When I'm plug in the device then following massage are show: Error mounting /dev/sr1 at /media/mohammad/GP Internet: Command-line `mount -t "iso9660" -o ...
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15 views

Openvpn with network-manager

So I've been trying to setup openvpn with my VPS like this: Raspi: provides route to home lan. Have set up routes on router already. Laptop: use when out and about by connecting to vps via openvpn ...
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28 views

How to connect to a LXC container from the LAN?

I have a server with the latest Ubuntu server 64-bit install in my home wlan. I use ssh to connect to it from my laptop. The server /etc/network/interfaces file: # The loopback network interface ...
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10 views

isc-dhcp-server: dhcp dynamically update dns records

i'm trying to dynamically update DNS records when DHCP give out addresses. but even though I have specified allow-update with a key in /etc/bind/named.conf.local and specified the same key in ...
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1answer
31 views

Preventing port scanning

I want to prevent my server from being port scanning from Internet and if port scanning occurs, block source IP address for several minutes. Below my current iptables config: Lilith> iptables ...
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42 views

“No network devices available” Ubuntu 14.04

I'm new to the Ubuntu community, so please, give a step-by-step answer if possible. Everything was fine, until my battery became critically low and my computer turned off. After charging and turning ...
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0answers
43 views

Ubuntu 15.04 Vivid network-manager causes kernel panic on Lenovo G505s [on hold]

I had Ubuntu 14.10 installed on my Lenovo G505s and I upgraded to Ubuntu 15.04 in February this year (to the beta release). A few weeks ago, I updated my installation with new packages. From that ...
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1answer
24 views

strange, random Wifi connection problems with 14.04

I frequently have problems to connect to my wifi from either my laptop and my desktop computer. Both machines run with Ubuntu 14.04. Sometimes I am just not able to connect to the wifi and the only ...
0
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1answer
25 views

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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1answer
42 views

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 ...
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1answer
28 views

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 ...
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1answer
26 views

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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26 views

Network folder access

I am new to Linux so there are quite few tasks that are new to me. First I am using DSL connection and wire is connected to wireless router and that is how we connect to internet at home. But if I ...
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24 views

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 ...