Managing and using network connectivity on a Ubuntu system

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Airtel data card not detecting on ubunty 16.04 TLS

I tried everything from 2012-2016 old post solution but nothing works. The same airtel Data card is working fine in Windows but not in latest Ubuntu. I have updated Ubuntu to the latest one with all ...
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Apache is not working

I have Ubuntu Server 14.04.4 LTS. I have a virtual hosts on my server. My .conf file :- <VirtualHost *:80> # The ServerName directive sets the request scheme, hostname and port that # ...
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1answer
16 views

Ssh to target host via gateway

Have a HostA that located in internal subnet which could be seen only from gatway host. Then I issue command like: %ssh -t -o ProxyCommand='ssh GateWayUser@GatWayHost nc HostA 22' HostAUser@HostA ls -...
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26 views

how can I force a mount -a to run after the system boots up?

Media server running Ubuntu 16.04 and Kodi. Synology NAS in the next room contains all the media. how can I get my fstab mounts working if they won't mount on bootup? -- tried switching to ...
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HP MFP M225Dn can print but cannot scan - ubuntu 14.04

I'm trying to set up a HP MFP M225Dn multifunction printer/scanner on a local network with 3 linux PCs (one with 16.04, one with 14.04, one with Mint 17.3 - based on 14.04). Printing was ok on 16.04, ...
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1answer
15 views

How to limit the amount of time SCP tries to connect for?

I have a bash script which copies any files in a 'to_send' directory, to a remote server via scp. The script runs an scp command on each file, checks the return code, and moves the local version from ...
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1answer
4k views

How to get network to “see” 14.04 desktop?

I'm also having problems with a new install of 14.04 desktop. I'm a novice to Ubuntu. I have another pc running 14.04 Studio and it works fine with my windows network. I did the following: [quote="...
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2answers
27 views

How to find my wi-fi password in ubuntu 16.04 LTS

Well, yesterday i wanted to connect in my wireless network in ubuntu 16.04 LTS , but figured out that i couldn't remember the router's password. First i check the router for the code in the down side ...
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1answer
43 views

Ubuntu16.04 LTS: failed to download package files. Check your internet connection

I realize this question has been asked multiple times and I've browsed through the answers and tried out the suggestions in them as good as I could. Still, the problem remains. Since some replies to ...
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1answer
13 views

Unable to access internet on Vmware

I have a Windows 7 host, and Ubuntu 16.04 as a guest operating system over VMware, I've been trying for a few days and have been unable to access the internet over the guest operating system. My ...
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1answer
15 views

Wifi connects but no internet

I am using ubuntu 16 and i am successfully connected to the wifi but i have no intenet access. Firefox says: Server not found. And chrome is saying DNS not found or something. All other devices are ...
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DHCP server setup and controlling a DHCP client in the form of a laser scanner

I have set up a DHCP server on my computer(Ubuntu 14.04) .I have viewed my 'connection information' and gave the following parameter values in my /etc/dhcp/dhcpd.conf file subnet 192.168.3.0 ...
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3answers
591 views

WiFi does not work: Ubuntu 16.04 on Lenovo Z51 Laptop

I followed the instructions in the top answer here: My wifi Qualcomm Atheros Device [168c:0041] (rev 20) doesn't show up and work in Ubuntu 14.04.3 on Lenovo flex 3 14 But got: (Reading ...
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1answer
16 views

Run script after DHCP acknowledge or after succesful WiFi connection

I would like to register a callback script, which would fire after DHCP acknowledge. Polling is an option... Is it possible at all, without driver/kernel modification?
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1answer
6k views

Why is my network interface named enp0s25 instead of eth0?

A lot of my scripts stopped working after installing Ubuntu 15.10 and I have trouble remembering this new name as I was used to ethx and wlanx for years. Is there a reason for this change? Do I have ...
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Forticlient on ubuntu 1404 - tunnel running but no IP

I am running Lubuntu 14.04 32bit and 64bit on different machines. I use forticlient SSL VPN to connect to my work server with the provided user name and password by the workplace. This setup works ...
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78 views

WIFI poor signal HP 15-af165sa

02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01) Subsystem: Hewlett-Packard Company Device [103c:804a] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV-...
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1answer
7 views

Can't get wifi to work on Ubuntu 16.04 with Intel wireless 7260 (rev c3)

I am new to using Ubuntu. I dual booted my HP laptop with Windows 10 and Ubuntu 16.04. I am unable to see any wireless networks on Ubuntu, but it works perfectly if I use a wired connection. My ...
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2answers
4k views

Connected to wireless, but no internet access

After installing Ubuntu 12.04 a week ago wireless internet had been working fine. It stopped working yesterday, however, and I'm at a loss for what to do even after scouring replies to similar posted ...
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USB Keytoken, Network Drives, and Encryption

(Note to site owners: What is your policy on cross-posting from another forum such as ubuntuforum. The following has already been posted there but without a satisfactory answer in over three weeks.) ...
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1answer
12k views

Install Network Printer Manually (Router : TP-Link TL-WR842ND)

Router Model No. : TL-WR842ND After reading this article, I carry on the installation but it does not work. This is the properties page : I have attempted to print test page but the status shows ...
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3answers
3k views

How do I with ufw deny all outgoing ports excepting the ones I need?

I did the following: ufw default deny outgoing, sudo ufw allow out 80 which I thought would let me use the Internet but didn't can y'all help? Also are there any other ports used by Ubuntu for which ...
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1answer
32 views

Cannot connect to internal IP on interface

I am running Ubuntu Server 16.04. I have a static IP assigned to the network interface on the server. This IP is routable from outside the LAN I am wanting to access the same server from the internal ...
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13 views

UFW setup for OpenVPN server

I set up OpenVPN server on one Ubuntu machine and I am connecting to it via another Ubuntu machine. However, the VPN works only when the server firewall (ufw) is disabled. That is I can connect when ...
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1answer
167 views

Aventail VPN tun0 dropping all packets

I'm using Aventail 10.7.1.449 on Ubuntu 14.10 and cannot connect via VPN anywhere, because all packets after the fix one are dropped: tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-...
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1answer
14 views

How can I point a domain to multiple ports based on the directory I am browsing to?

I have a server running at home. This server is running on a public IP which is defined on my domain as an A record. Everything is working currently. I run Apache for a small website along with ...
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3answers
3k views

Shrew Soft VPN fail to attach key daemon

I'm trying to use Shrew Soft to connect to my school VPN. But as you can see here, it says failed to connect to key daemon I searched for the solution and people who use Shrew Soft Trace ...
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1answer
102 views

Ubuntu 16.04 USB modem detected as CD-ROM. Unable to connect

I am facing difficulty in installing my USB modem in Ubuntu 16.04. Most of the time I connect my USB broadband modem it is connected as CD-ROM. What I understood from the web was that usb-modeswitch ...
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28 views

No wireless or wired internet after installing ubuntu desktop 12.04

After installing ubuntu 12.04, I can not connect to the internet wirelessly or wired. my pc is a recent machine may be this is a problem of incompabity, the result of ifconfig -a is in this image. ...
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3answers
4k views

Qualcomm Atheros QCA9377 wireless not working on lenovo with 14.04.3

Help, I've tried the other fixes used for ubuntu 15.10 and the Qualcomm adapter but nothing is working for my lenovo ideapad 500 with the Qualcomm Atheros QCA9377 wireless adapter running 14.04.3. ...
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3answers
15k views

How to enable Wireshark without running as root in Trusty 14.04

I installed Wireshark. Running as root is not recommended, so I Did sudo dpkg-reconfigure wireshark-common According to: http://wiki.wireshark.org/CaptureSetup/CapturePrivileges http://anonscm....
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No 'Network' in System Settings Ubuntu 14.04

I am currently using Ubuntu 14.04 as a single-boot OS on my laptop. When I go to System Settings -> and type Network, nothing appears as in there's no Network option there. When I use the command ...
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1answer
48 views

MacBookPro11,3 wifi issue with Ubuntu 16.04

Good Day All, I have been having issues getting wifi to work in Ubuntu 16.04 on my MacBookPro11,3. Installation of the Broadcom drivers found here leads to dependency issues. If anyone has any ...
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17 views

preferable wifi adapter

I'm waving the white flag in my fight with the wifi adapter. 02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01) Looking for the new adapter at the ...
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1answer
18 views

iptables rule traverse order

Here is partial output of my iptables: Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 22866 ...
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2answers
10k views

“Connection is Untrusted ” error in Firefox

I have downloaded Ubuntu 14.04 and I have tried it (without installing it). I connected to the internet via DSL and I tried to surf. When I tried to go to an https:// site, it showed me the error ...
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Ethernet Adapter problems

I recently installed Ubuntu on my hard drive alongside Windows. Since then, when I boot into Ubuntu and then back to Windows the ethernet adapter fails to connect to any network. I can still use the ...
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To create a packet sniffer and redirect the packets to interfaces based on the socket address using python

The problem statement is Python based program to Capture packets on a particular interface of a VM.Filter the traffic based on protocols and socket address.then based on the protocol/socket address ...
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1answer
17 views

Adding static route with DHCP

I have a dilemna. I wish to add a permanent static route to a machine that is using DHCP to obtain the DNS server address. To further explain, when I use DHCP I must request both IP address and DNS ...
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2answers
68 views

xenial: remmina unable to connect via rdp to win 10 vdi

Remmina (supplied host name, userid, pw, domain, security=rdp) gives the subject response. Also, per other posts, xfreerdp gives the following response: expected PDU_TYPE_DEMAND_ACTIVE 0001, got ...
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1answer
25 views

Can't access Network Shared Folder

I want to share file from my laptop to PC throught router. Both computers are in the same network and they see each other. When I set up sharing on laptop with Ubuntu (with guest access and read/write ...
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33 views

Unable to connect wifi on ubuntu 16.04 from my asus tp 200s

I have just installed ubuntu 16.04 on an asus tp200s and the wifi is not working, it cannot even see networks. my output of lspci is: 00:00.0 Host bridge: Intel Corporation Device 2280 (rev 21) 00:...
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11 views

Sipsak error: didn't received '200 OK' on register

How can I use sipsak to simulate a call on the CLI between SIP accounts? I can only run a local test using Asterisk successfully and would like to run a similar test or simulation using linphone, ...
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23 views

What is my DNS mis-configuration in docker?

I recently installed docker on my ubuntu 16.04. I pulled and run hello-world, ubuntu and sinatra images sucessfully, but they cannot connect to the internet I think!! Example the following errors ...
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Wifi connects, works a few minutes and stops

I'm starter with Ubuntu and I have some weird problems, I just installed ubuntu, additional drivers, all the updates but here's this weird problem, it connects to the wifi, works perfect like 2 ...
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LXD profile. How could it be defined?

I am not a sysadmin, so I am almost ignorant on this. I have a laptop connected via wlan interface and I want to use lxd containers and the network inside the containers. here https://insights.ubuntu....
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41k views

How do I change / spoof my MAC address and easily switch between multiple ones?

My router can do port-forwarding based on MAC addresses. That is, a specific MAC will get a specific IP, for which I can configure a set of ports to be forwarded. In order to easily change that set of ...
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How do I open ports for Asterisk and SIP?

How do I know whether port 5060, for SIP, is open on localhost? thufir@mordor:~$ thufir@mordor:~$ nmap localhost Starting Nmap 6.47 ( http://nmap.org ) at 2016-06-29 23:09 PDT Nmap scan report for ...
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1answer
2k views

Cannot connect to any networks after spoofing MAC address

So I want to spoof my MAC address. However when I do so I am unable to connect to any networks. After changing it back to the physical MAC address of the network card, it works just fine. It worked ...
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21 views

Connection refused when Host OS(Ubuntu) telnet the Guest OS(Windows XP) of the Virtualbox

I can't telnet the Guest OS(Windows xp) in my ubuntu machine but I can successfully ping its IP address. In the network settings of guest os, I enabled two adapters. Here are the the settings of the ...