Managing and using network connectivity on a unix system

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How to set per-process or per-application system level proxy in Linux?

I have searched on the Web with very few to none of the results which help me setup a system level proxy setting in a way that only certain applications use the proxy. Rest of the applications should ...
3
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2answers
58 views

WPA supplicant dropping/disconnecting NIC in hotel wifi

TL;DR WPA Supplicant intermittently fails on my Raspberry Pi 3 when using a USB Wifi dongle. It appears to do this when "reconnecting" to or changing access points in the hotel. WPA GUI states: ...
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1answer
25 views

How to host a website on kali linux virtualbox machine? [on hold]

I have a puzzle, shown here: http://imgur.com/a/ijyPf. How do I host my website on a Kali Linux virtual machine? How do I access my website with my public IP? I just don't know where to start and ...
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4answers
31k views

Can I create a virtual ethernet interface named eth0?

I am running Arch based on the Linux 3.10.5-1 kernel. The system uses the new de-facto naming conventions of ethernet interfaces enp*s* and wlp* etc. This is a problem however, as my educational ...
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2answers
41 views

Combine Two SSH Commands

The first ssh command is done on my computer, I enter the key password, then put the second ssh command in while logged into the server. ssh -i cloudkey -L 6000:localhost:6001 admin@54.152.188.55 -p ...
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1answer
25 views

How to determine if it is a fault of the Network Card?

Basically, I have a PC having problems. Let's call it POO. POO is a pc running Gentoo Linux, with KDE. It is quite freshly setup on an old hardware. So far I do not notice it has other problems, ...
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4answers
32k views

Yum update problems on CentOS 6.5 minimal as VMware guest

INFO: I am using Windows 7 Pro (64bit) with VMware Workstation version 10.0.1 . I am using CentOS(64bit) 6.5 minimal, for the first time. I am running this from my workplace network, which may use a ...
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33 views

How to configure internal network card to use with VmWare and Kali Linux?

I have heard that now it is not necessary to use an external wifi network card in order to use with kali linux over VM Ware, is it true ? So, How to configure my internal network card in Kali Linux on ...
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2answers
2k views

How to set up wifi hotspot with 802.11n mode?

I have two computers running Ubuntu 14.04 (ok, one is actually Mint 17.1, but that's based on Ubuntu 14.04), and I am looking to use one as a wi-fi hotspot for the other. Both computers have identical ...
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2answers
979 views

AP randomly gets unreachable for the clients while hostapd is running

I got an old PC running as router which has 3 NIC and 1 wifi PCI card TP-Link L-WN751ND. This box runs Debian Wheezy, hostapd, dhcpd etc. The problem is that AP randomly gets unreachable for the ...
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Wep authentification fails with netctl

When trying to connect to a network protected by wep on my laptop I get the following error: Wpa association / authentification failed for interface <interface> I have the latest version of ...
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4answers
5k views

Trying to connect to gateway in static ip network

I have arch-linux-arm running on a raspberryPi. The network I am in uses static IPs. gateway IP is 192.168.178.5 IP for my device is 192.168.178.201 To connect to the internet I use: ip addr add ...
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1answer
28 views

SSH - How To Make Three Computer Tunnel?

ComputerA connects though putty to Server at port 77, and there is a reverse tunnel set up from the Server at port 6666 to ComputerA at port 22. ComputerA also has a ssh server set up with a user ...
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1answer
21 views

CentOS requires root pw for network pref changes

Why does CentOS require root privileges to configure the preference panels? It seems like sudoer access really should be sufficient for this. Is it possible to change this?
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1answer
2k views

Run root script or command as root in startup application in linux mint

I have a wireless adapter that used to work in Linux mint 16 (dwa 171) after installing drivers for it. Now it won't work the same way anymore since I upgraded to linux mint 17. I've found the only ...
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2answers
4k views

How to connect two computers via internet with ssh?

I want to connect another computer via internet that doesn't have a public IP. Is there any away to do this?
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1answer
816 views

Allow multicast packages from the bridge to wire in KVM

On a CentOS 6.5 host, I have a couple of guests - Ubuntu 12.04 and CentOS 6.5. The Ubuntu guest is generating mcast traffic that is visible via a tcpdump on the br3 interface. It is also visible on ...
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33 views

how to make my Linux virtual machine communicate with windows? [on hold]

I don't know if this is the right place to post this question , but I'm facing this problem for some days. I'm trying to connect my web application (developed in windows in an IDE) to a database ...
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2answers
47 views

Static IP configuration on openSUSE

Long-time Windows user here -- this is a beginners question, network-configuration (especially on Linux distributions) is not my area. I believe I've done my research, however. Although I might've got ...
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1answer
34 views

Unable to reach network from chroot

I have a complicated scenario, with most of the complicated parts working: SD card contains a Fedora 23 Raspberry Pi install on a LUKS/BTRFS filesystem. Fedora 23 x86-64 VM being used to manage the ...
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2answers
44 views

net cat client and server model

I tried to make server client model as below on one shell nc -l -p 8080 this works as a server and on another nc 127.0.0.1 8080 and this works as a client all of this is fine ... the ...
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1answer
18 views

how to configure a linux machine to broadcast the incoming traffic

I want to configure a linux machine so that it can broadcast all the traffic received by it to other linux machine (in this case the connected nodes). Can someone help ?
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1answer
60 views

How best to enable end-user configuration of wifi or Ethernet on embedded device?

I'm building a device that includes an embedded Linux computer and I need to allow the device user to (easily) configure the device to connect to their wired or wireless network. I know there are ...
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1answer
22 views

Trouble Creating Virtual_IP for PaceMaker + Corosync - CentOS 7

Ok so I have gotten fairly far into the configuration successfully, the two nodes have authenticated each other and all is well, but when I try to add the virtual_ip it never starts. What i've used ...
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7answers
30k views

hostapd will not start via “service” — but will start directly

I am having trouble getting hostapd to start as a service. It fails when I try to start it: $ sudo service hostapd start [FAIL] Starting advanced IEEE 802.11 management: hostapd failed! From what ...
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1answer
39 views

Which process sent data out of my computer?

Using vnstat, I observed a lot of uploaded data from my computer and I don't know which process sent data out of my computer. Is there a tool to get stats on how much data a process consumed during a ...
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1answer
138 views

Network Manager error - “cannot send router solicitation”

I see this error occuring for network manager, but only after the laptop goes to sleep mode, and I come back to wake it up. NetworkManager[2040]: <error> [1456121915.287806] ...
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1answer
894 views

How can I manually reset RX / TX counters in ifconfig output without impacting data delivery?

CentOS 5.9 I'd like to reset the RX/TX counters in ifconfig output for an interface. My understanding is that these counters get reset during a reboot but I'd like to avoid rebooting. Is there ...
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1answer
684 views

How to forward Remote-Desktop Port across interfaces using ufw?

Machine A has two network interfaces: Network eth0: 10.10.20.0/24 Network wlan0: 192.168.1.145/24 Machine A has 192.168.1.145 as Default Gateway, and also a route to pass 172.16.0.0/16 to ...
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2answers
29 views

How can I auto-close dropped SSH connections?

When I work on my server remotely, sometimes my SSH connections get dropped due to network issues. When I re-connect to my server, the dropped sessions remain open. I can see them when I run w. I'm ...
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824 views

Compile network card driver on debian

I buy a new network card , D-Link DGE-528T. My OS is Debian(Jessie) kernel : 3.16.0-4-amd64 but it can't detect the new network card, so I must to compile driver by myself. follow README file. ...
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5answers
23k views

How can I limit the bandwidth used by a process?

I have a CentOS 5.7 server that will be backing up its files nightly. I am concerned that visitors to the various sites that the server hosts will experience degraded performance while the backup is ...
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1answer
270 views

Cloned system + network interfaces

I'm currently in a little bit of a pickle. I've made an image of my system and I have given it to someone to run. They have successfully flushed their system with the image and are running it. The ...
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4answers
8k views

Traffic stats per network port

I have two machines with two applications that talk to each other on few network ports (TCP and UDP). I want to count traffic that they send and receive. I need not only overall count but stats per ...
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6answers
47k views

CentOS no network interface after installation in VirtualBox

I have Ubuntu 12.10 on which i installed virtual box on which I setup centos 6.4 i386. On Ubuntu I have: 3.5.0-17-generic kernal running. On virtual box I install centos 6.4 and everything works ...
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1answer
761 views

SSH to Linux Container from Other Machine

I am trying to learn about Linux Containers and this is my first encounter with servers, ssh and many other things that I do not know the terms yet. I create five different containers and authorized ...
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0answers
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Resolve NetBIOS Names via Samba 4.4

Through StackExchange, we knew how to configure Linux to resolve NetBIOS names, and I have configured my system in those ways. (I have installed winbind, configured my /etc/nsswitch.conf correctly and ...
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1answer
17 views

how to change all the hostnames reported by hostname --all-fqdns?

Running hostname -A reports two host names: an incorrect one that doesn't even resolve to my server and a correct one. $ hostname -A notmyhostname.notmydomain.com myhostname.mydomain.com The ...
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1answer
40 views

How go generate a valid and random MAC address?

You probably know that MAC address can be generated, for instance, in the following way: macaddr=$(dd if=/dev/random bs=1024 count=1 2>/dev/null|md5sum|sed ...
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0answers
26 views

Can't ssh into my server from another computer

I used to be able to ssh into my server from other computers. But I stupidly messed up my remote connection setup a couple weeks back (I don't remember what I did...) and now I can't ssh into my ...
0
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1answer
1k views

Laptop connected to wifi but no internet

For some reason my wifi has decided to stop working. I can connect to APs, I can have excellent signal strength, but I can't actually load any web pages or ping anything. I know it's my laptop because ...
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2answers
16k views

How to set up an Internet Connection in Linux Mint?

My machine has wired Internet connection with Windows 7 OS. In connection properties I see service name : ispone obtain IP address automatically obtain DNS server address automatically How do I ...
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1answer
52 views

VMWare vSphere packet loss

I have a Dell Blade Enclosure with 14 blades and ESXi 5.5 on it. On blade 7 and 14 I have round about 65 % packet loss when I ping the ESXi Management interface. On all other blades there is no packet ...
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1answer
15 views

How do I configure Docker containers to have unique IP addresses that are not the default ones?

How do I configure Docker containers to have unique IP addresses that are not the default ones? The Docker containers will run Apache or some web service. These Docker containers will share one host ...
2
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0answers
25 views

How do I get Consul to work so I can get Docker Overlay to work?

I am running CentOS 7 with Docker. I am trying to install Consul on the Docker server. Consul is unzipped. The binary file works for showing the version. I ran this: echo $CONSUL_RPC_ADDR This ...
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4answers
81k views

How can I find available network interfaces?

This is in regard to linux, but if anyone knows of a general *nix method that would be good. I booted a system yesterday with an ethernet cable plugged in. "NetworkManager" is not installed, so once ...
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4answers
5k views

Elementary OS shows WiFi networks, but won't connect

In the top bar, clicking the network icon shows a list of networks. My school's network, which on Windows I would connect to, and then visit a login page in Chrome in order for it to work, shows on ...
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1answer
4k views

unable to restart networking daemon

When I type sudo service networking restart, I am getting error as shown below: edward@computer:~$ sudo service networking restart stop: Job failed while stopping start: Job is already running: ...
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“link is not ready” error, vanishing network interfaces

I recently had a weird problem when trying to use airmon-ng. Here is its description: First, I plug in my USB WLAN adapter, and type ifconfig. Everything goes well and I see all interfaces are ...
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1answer
50 views

CentOS “service network restart” FAILED - where is the error log?

In CentOS, I ran the following command. But it doesn't give me explicit errors to investigate. How can I troubleshoot further or find the errors? service network restart