Managing and using network connectivity on a unix system

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"Error: no device found for connection 'static'. while creating network connection with nmcli

I am using Red Hat Enterprise 7 for on Vmware. I am getting error which creating network connection with nmcli Here is my all steps [root@localhost Desktop]# nmcli con show NAME UUID ...
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33 views

Kali internet error— High RX packets and TX packet error Ping working

I'm a new Linux user who just switched to Kali Linux. However, it appears that I am unable to browse the internet with iceweasel though ping works fine. Further inspection with ifconfig and iwconfig ...
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38 views

how to solve networking starting problem?

I am using Ubuntu OS. I need to find my IP address to configure the interfaces in /etc/network/interfaces. Yet my networking service cannot restart. I get this error message: $ service networking ...
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1answer
133 views

How to install ALX drivers for an AR8171 network adaptor in OMV

I bought a shiny new ASRock FM2A88X Extreme4+ motherboard (which I chose specifically for the plentiful expansion slots) to run my shiny new file server. During the installation of Open Media Vault, ...
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60 views

Establish reverse ssh tunnel at OS startup / network connection up

I'm trying to setup a reverse SSH tunnel using a middle-man, due to firewall restrictions. I took the following steps: from ssh server do reverse tunnel: ssh -R 8080:localhost:22 ...
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42 views

Networking works only when using Iceweasel in Kali inside of VMWare

As the title says, I have a problem with my connection in vmware. I'm using vmware 10.0.1 andthe latest version of kali. It's a little weird that my connection will only work on iceweasel browser but ...
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51 views

Unable to connect the Ubuntu EC2 instance to VPC LAN on AWS using secondary NIC adapter?

Infrastructure setup: VPC is created with 192.168.254.0/24 netwok Private subnet within VPC (Virtual Private Cloud) is created with 192.168.254.0/25 network Public subnet within the VPC is created ...
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59 views

Serial Number Ban in Teamspeak

Hello I have a dedicated server and from it I'm running a teamspeak 3 Server. I want to ban the serial number of a specific client connecting to my teamspeak server. Although I have banned him from ...
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58 views

Sharing ethernet over wi-fi with Network Manager and dnsmasq

I'm running archlinux with kde desktop. I want to share my enp2s0 connection via wi-fi. So I've installed dnsmasq. Here are some configs: /etc/resolv.conf # Generated by resolvconf search telecom.by ...
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57 views

Linux Mint will not allow traffic from one specific PC on LAN

I was editing /etc/network/interfaces, and then decided to change my settings over VNC instead. This halted my SSH session and also my VNC. I'm not sure if this locked me out or not, but I set cron up ...
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23 views

suddenly no service, except ssh is accessible from wan

I recently did install the GNOME Desktop and Graphical Administration Tools package groups to my remote host, for remote desktop connection. After the installation of nearly 550 dependencies was done, ...
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95 views

vmxnet3 multiqueue support in vmware workstation

I'm working on an application based on RSS multiqueue(receive side scaling), and testing it on vmware workstation, but found that vmxnet3 nic have problem with RSS. My linux virtual machine has 4 ...
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34 views

OpenVPN on Ubuntu VM

I am trying to create a VLAN Network from my home network for a web-dev platform. I am running Ubuntu servers in VirtualBox on a Windows 7 machine. I am running an Ubuntu DHCP/OpenVPN/Shorewall ...
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26 views

Changed to another wi-fi network does not connect

I'm always connected to a wireless network in my home from my Ubuntu 14.04 laptop (via routers) Now I am in another place where there's an iMac sharing internet connection. My phone and other's, and ...
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21 views

iptables and applications

I'm trying to set up a little download box. I currently have pyLoadCore, Transmission-daemon and openvpn all running on raspbian (raspberry pi running headless). My problem arises when I have openvpn ...
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25 views

multiple instances of /usr/sbin/ifplugd

why do i have multiple instances of /usr/sbin/ifplugd running, is there a problem Also my CPU seem to be running Maxed. I suspect the 3g got disconnected and the system was then trying to connect each ...
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313 views

Network firewall on CentOS, host cannot be resolved?

I have a centos machine and I am trying install some dependencies using yum. When I do this I keep getting a message saying the host cannot be resolved. I was told the previous person that used the ...
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190 views

Kali linux network connection icon missing

I was trying to setup a vpn connection in Kali linux but i don't know what did i do that network connection icon (screen top right) is missing and i can't connect to internet! How do i fix it?
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59 views

Network communication between two nodes in a Hadoop cluster

I am running a 7 node hadoop cluster with each box running Ubuntu 12.04. It is running CDH4 setup using Cloudera Manager. It was already setup and running when I came in but now I'm running into a ...
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62 views

Received DUP when using ping. What should I do?

I was pinging Google last night and one of them came back as DUP(!). I did some reading and I found this in the man pages on ping(8): Damaged packets are obviously serious cause for alarm and ...
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24 views

Setting gateway to dynamic IP

My home router (given by ISP, must use it) does not accept static IP connections. I need to set the gateway for eth0 pointing to wlan0. I've succeeded in setting gateway in etc/network/interfaces/ to ...
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26 views

Find out the cause of “Hard Block”

I have a Beaglebone Black I managed to install wifi drivers, find networks to connect to, but I always fail to do so. Apparently rfkill is setting Hard Block which is ( correct me if I'm wrong) ...
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103 views

how to route traffic on port to ip:port on linux?

I'm trying to route all traffic on port udp 5000 to udp 192.168.0.1:12333 with the following command: $ iptables -t nat -A PREROUTING -p udp -m udp --dport 5000 \ -j DNAT --to 192.168.0.1:12333 ...
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75 views

How to bridge a VM to public IP

I wish to to assign the IP from my eth1:2 to a VM; I also have no use of this IP for the host, it would be desirable to be exclusive to the VM. I've ended up with a setup just like this (eth1:1, ...
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44 views

Using PulseAudio to receive RTP audio stream

I'm trying to set up simple communication between my Ubuntu distro and my Rasbian distro on the raspberry pi. I'm more concerned about the rPi side of this project. I've been looking around the ...
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24 views

how to connect to VPN only when ethernet is down and 3g is up

is the following possible and how could it be implemented. set up /etc/network/interfaces file so the VPN "tunnel" only connects when the ethernet cable is disconnected and the 3G interface "ppp0" is ...
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72 views

Frequently Internet Disconnects

I have installed RHEL 5.8 on IMB server. Also I have configured static IP through eth0. When I try to ping any website e.g. google.com, yahoo.com It works only for 25-40 seconds and internet ...
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2answers
552 views

Ubuntu cannot find or detect new wired network adapter

I want to use two ethernet cards on my machine. So I've physically inserted the new ethernet card in to my machine. However when enter the ifconfig -a command Ubuntu cannot find or detect the new ...
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37 views

How do you connect app and DB servers from separate containers?

With Docker, how can I make the DB in one container accessible by the app server in another?
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57 views

trouble bridging tap0 and tap1

I have a GNS3 router that is connected to tap1 in my host. On the other hand, I have an user application connected to tap0 running locally in my host. I can ping both the router and my application. ...
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89 views

connected to ethernet and wifi, “route” browser's connection to wifi only

Sometimes, in my company, I have to work with a different network (through ethernet) that has no internet. On the other hand, I do have access to out Wifi, which has internet. Since I have to spend a ...
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38 views

How can I compile and run a program designed for an older kernel version (2.6) in a newer kernel (3.16)?

I'm trying to run a driver for a network card, but it only supports kernels up to 2.6.32. I need to be able to use this piece of hardware to connect to the Internet. The device I'm using is "VIA ...
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22 views

What is the functional difference between wpa_supplicant and the system's /etc/networks/interfaces file?

I understand that one is a program and that one is a configuration file used by linux, but practically what is the function of each of these pieces in conjunction with my computer's network ...
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27 views

Fedora does not load some sites in home network

Since I switched from Windows 8.1 to Fedora 20 (my first time Linux experience) I have problems in my home network. When I surf from the office with the notebook, every site loads fine. As soon as ...
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37 views

route -n gives output “route: fscanf”

If I boot my system and no interface has an IP address I get the above output. However if I give an interface an IP, even if I remove it again, this will disappear. Why does this happen? Is it that ...
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27 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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272 views

FreeBSD 10: CARP & LAGG interface incorrectly chooses state

I'm having an issue with my CARP configuration on a pair of FreeBSD 10 servers acting as NAS units. I'm using CARP so that the servers share a virtual IP with the goal of making failover somewhat ...
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69 views

Why on my Linux PPPoE connection displays sometimes authentication failure?

Here is my log: Oct 18 09:51:52 -desktop pppd[2764]: Plugin rp-pppoe.so loaded. Oct 18 09:51:52 -desktop pppd[2766]: pppd 2.4.5 started by root, uid 0 Oct 18 09:51:52 -desktop pppd[2766]: PPP session ...
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47 views

I'm trying to create a public TLD using BIND

I'm using these two guides: jackal777.wordpress.com/2013/11/19/custom-tld-for-local-network/ timg.ws/2008/07/31/how-to-run-your-own-top-level-domain/ When I run dig sokolovskaya.ssu, it looks ...
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139 views

Routing incoming source IP traffic to a loopback IP issue

I'm wanting to accomplish the following: I have a BIND DNS server setup where it is listening on ANY address and also listening in a BIND config ACL on 127.0.1.1. If there is another way where you ...
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259 views

Setting up a wireless connection on CentOS 6.5 without NetworkManager

I'm trying to set up a wifi connection from my CentOS 6.5 system to a wireless AP, without using NetworkManager. This is a fresh installation, but yet I don't see any ifcfg-* files in ...
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138 views

In general should Linux “ping” be faster than Windows “hrping”?

I'm using HP DL360p Gen8. I've installed dual-boot Windows Server 2008 R2 and RHEL7. In both systems I configured LACP and VLANs. So this is same server, same hardware, same network, same route tables ...
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77 views

sMail server cannot get connect by Linux frequently

I have a mail server A build by iredmail on Centos6.5 system. The mail server have a public ip aaa. There are about 40~50 mail clients which operating system is windows in local network, they all ...
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78 views

Centos List connected computers/devices on network

I'm running on a CentOS and I would like to check to see what computers/devices are connected to my network. How would I be able to do that. I've tried nmap but I must have used it in the wrong order ...
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11 views

Appletalk access to root

I am using netatalk 2.2.2-1 on my Raspberry Pi (running Raspbian) to allow access from my Mac. This has been working well for my Home directory, but I have tried to get access to the Pi root without ...
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223 views

How to configure teaming in RHEL 7?

I've used RedHat documentation to configure LACP on my server. Now I see "Connecting" on the Team just created: why "team0" is mentioned twice in the list? Why is it "Connecting", not "Connected? ...
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86 views

nmap won't recognize a hostname on my local area network

Scanning the machine on the LAN with my laptop, I got this: gabriele @ osiris { ~ } [ Tue Oct 07 ] [ 08:49 PM] nmap -sP 192.168.1.236 Starting Nmap 6.40 ( http://nmap.org ) at 2014-10-07 20:50 CEST ...
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36 views

How can I connect my REMnux to wifi

I have a copy of Linux REMnux 5 which is specially designed for Reverse Engineering. It is based Linux Ubuntu. But I don't know how to connect it to a wifi connection or even a wired connection.
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39 views

Kernel routing table destroyed

I have a server that I have virtualized, and as of yesterday, it started acting weird. I couldn't SSH into it, but when I tried SSHing into it from another server on the rack, it worked fine. DNS ...
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19 views

olsr not communicating in two hops

I was trying to set mesh network using olsr protocol. I installed olsrd daemon and is working fine. node1 ------------node2-------------ode3 (olsrd) adhoc (olsrd) adhoc ...