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1answer
43 views

Connect New Server to Static IP and To DNS Server

I have a strange setup. I have drawn a pretty crude diagram so it may be easier to explain. Usually, all the new servers we add just go into the HPC cluster and we assign an IP address through our ...
1
vote
3answers
10k views

How to find out total NIC cards and total available physical ports in linux

I need to find out how many total physical ports my server has, and how many of them are in use and how many free. Can you kindly help how to find it: This is what i find from dmidecode output: #...
1
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0answers
25 views

What does “Current message level: 0x00000033 (51)” mean?

There is a similar question here What is the "Current message level"? Reference linked in the answer there doesn't mention this 0x00000033 (51) value. Here is the complete output of ...
0
votes
1answer
49 views

Two different Network interfaces simultaniously CentOS

I am going nuts since I have been trying to solve this for nearly a week now. Scenario: One Server with two different network devices. Each device is plugged into a different company subnet. eth0 ...
0
votes
1answer
80 views

How can I logically separate interfaces on a host?

Problem Introduction I have a network topology which looks like the below diagram. All hosts are running different Linux distributions, and all my configuration should (hopefully) be done on Host A, ...
0
votes
1answer
59 views

How to disconnect and reconnect PPPoE on a UBNT airMAX device?

Using a Telnet or SSH connection to my Ubiquiti PowerBeam device, I'd like to disable and enable the PPPoE connection on demand, so I can save internet bandwidth when I am not using it. (Prevent ...
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0answers
12 views

Cannot connect to machine on local, statically configured network

I'm trying to set up a second NIC on my desktop to be able to ssh into another local machine running ubuntu (I don't want that machine to be on the other network). My second NIC and my ubuntu machine ...
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0answers
12 views

lsof: restrict to sockets available via loopback

I can restrict the selection to sockets listening only on the loopback interface: $ lsof -p "$(pgrep -d, proga)" -i4TCP@127.0.0.1 -sTCP:LISTEN -P -n -a COMMAND PID USER FD TYPE DEVICE SIZE/OFF ...
0
votes
3answers
91 views

Interface Eth1 not visible in Virtual Machine

I am new to linux networking. Basically I wanted to use eth1 interface of my PC in VirtualBox but I simply don't find the eth1 interface. Below are the ifconfig and sudo ifconfig eth1 outputs. Please ...
8
votes
5answers
41k views

When a PC has both a wired and a wireless connection, how is information transferred?

My PC has two connections (wireless and wired) simultaneously. Both of them have an internet connection. In this situation, how does it connect to the internet? How do my LAN and WLAN interfaces know ...
1
vote
1answer
23 views

Run ethtool after boot

I'm running lmde 2, and My net card doesn't seem to be able to work with my modem unless I set it to work with 10 mbps. Currently I'm using the command: sudo ethtool -s eth0 speed 10 duplex full ...
0
votes
0answers
30 views

Use both WiFi and Lan to speed up the download

In my office we have WiFi and RJ45 LAN connection to my laptop. Both works well individually. We do not use DHCP and hence I have configured two different static IPs for these interfaces. While I ...
0
votes
3answers
50 views

USB Ethernet to my machine rather than RJ45 NIC Cards

I have a 7 node cluster setup in my organization and they all have dual port Ethernet NICs on them, running Ubuntu 14.04.4. Each machine is connected to two networks at the same time. Requirement: I ...
0
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0answers
43 views

Windows doesn't set interface metric properly

When I try to set an interface metric on a specific NIC , it doesn't work. When I check with netstat -rn they are completely different than ones I set. I tried enabling and disabling adapters but it ...
0
votes
2answers
30 views

Things That Affect NIC Cards' Performance?

Folks, I have a laptop and a tower. And I use EtherCAT (through Ethernet port) on both. But I notice that if I unplug my cables on the tower, I loose a lot of frames, where as in the laptop I may not ...
1
vote
1answer
156 views

Can i see my bluetooth connection as network interface in linux?

I have 2 laptops. i have paired them succesfully with each other via bluetooth, so i can exchange files between each other. Both of my laptops have linux installed. when i run the ifconfig command to ...
0
votes
0answers
18 views

How to create alias interface in windows

How to create an alias interface which has a static ip co-existing with the regular broadband connection. The thing is I want to be in two network at same time. I have done this in Linux, but I don't ...
2
votes
0answers
443 views

Windows 7 gadget or app that shows stats on multiple network interfaces?

I am looking for a Windows 7 gadget or app that I can leave on my desktop/sidebar. While there are many gadgets that will display network interface info (such as current IP, gateway, etc), what I ...
0
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0answers
12 views

Is proxy traffic monitored by loopback device?

I understand loopback device acts like a mirror interface to my localhost. When I do ifconfig on my Ubuntu machine, I get this lo Link encap:Local Loopback inet addr:127.0.0.1 ...
-1
votes
1answer
54 views

How do I ensure a VPN is always used?

I'm running a VPN and wonder what happens if the VPN connection breaks. When I run ifconfig i see my default ethernet adapter at en0 and the VPN at utun0. All traffic is running through the utun0 ...
0
votes
1answer
53 views

Configure ethernet interface to accept unidirectional ethernet

With switches you can configure an ethernet port to be unidirectional. This gives you the ability to double your traffic capabilities. Can I configure my ethernet interface on a unix system to read ...
1
vote
0answers
62 views

Ubuntu Network Interfaces Configuration: 2 Network Cards

Sorry for broad and ambiguous title. The case is: I have 2 Network Cards, eth0 and eth1. OS: Ubuntu: 14.04. eth0 is configured with static address: 10.1.1.1 and provides WIFI, DHCP and DNS services ...
0
votes
1answer
190 views

Ubuntu 15.10 server - nameserver config broken after reboot

After a reboot, I can't resolve any hostnames anymore. Well, the Ubuntu system, is running within an VMWare server, it shouldn't matter. The config under /etc/network/interfaces contains: auto ...
3
votes
3answers
280 views

Testing 10G Ethernet with two NICs?

I would like to test 10Gig Ethernet serial interface by installing two NICs(Network Interface Cards) on a pc and pinging. I have the following questions: 1- Can two separate NICs be installed in one ...
1
vote
0answers
80 views

How to find the IP address of the interface connected to the Internet on a Cisco device?

I have to subnet the Class B network of 128.0.0.0. I have already done the subnetting, but when writing out the interface IP addresses, I have no idea what that is for the router's interface ...
1
vote
1answer
674 views

Public static IP address for LXC container

I have a server running Ubuntu 14 (server edition), connected to a network using two network adapters. These two network adapters are configured in a bond to have network redundancy (in case one of ...
0
votes
1answer
112 views

Connect to multiple PPP interfaces with dynamic IP simultaneously

I have a web server that listens on eth0 and performs queries via multiple ppp0, ppp1, ..., pppN (these are 3G modems) interfaces during request. Is it possible in Linux to set up routing in a way ...
0
votes
0answers
239 views

Network device naming problems and aliases for p2p1 and p3p1 back to eth0 and eth1

I'm having a heck of a time getting the networking stack up and running on a Ubuntu Server 14.04.3 installation. (Its personal for the house and I'm not a SA, so I can't ask on SF because its a ...
2
votes
2answers
166 views

Use two network interfaces simultaneously

I often use Wi-Fi from some public networks which don't allow some protocols (like torrent or IRC - next I will only speak about IRC). If I want to use one of those protocols, I have to use my phone ...
4
votes
0answers
133 views

Why do different users get different IP via the same interface

On the same server, on root, I am getting the correct internet ip of the interface root@server:~# curl -s --interface ppp0 ipcheck.com 111.111.111.111root@server:~# However... If it's not super ...
0
votes
1answer
126 views

How to use multiple network interfaces?

I need to use multiple network interfaces in a C program with sockets. My interfaces are wlan0 and eth0. When I connect eth0, the ping through wlan0 returns "Host unreachable", and consequently the ...
0
votes
1answer
54 views

Disable DHCP for one interface only

On my PC I have one Ethernet port that I use for network testing purposes (testing Openflow switches). For that I want that port to only send the packets that I tell it to (using packet generator ...
0
votes
1answer
12 views

Move existing linux flash image to new board and maintain interface indexing

I wrote a small php application on a SBC. I created a disk image from the CF card. When I write the image to a new CF and install on a new SBC the interface index numbers (I hope I am stating that ...
2
votes
1answer
801 views

Run only specific /etc/network/if-up.d-script for specific interfaces

I would like to run a network script when bringing up a specific interface (e.g. eth0) by invoking ifup eth0 The script should ONLY run when bringing up eth0. My approach was to write the script (...
3
votes
1answer
2k views

Can WiFi repeaters cause interference?

I have a old Linksys router the I converted into a repeater using dd-wrt firmware. Its been running great but I'm just curious is it possible that it could be interfering with the main router?
1
vote
1answer
293 views

Clients from multiple subnets can't simultaneously connect to server

I have setup servers for several games in the past where either players from outside my local network could join, or players from within my local network could join, but not both at the same time. ...
2
votes
1answer
3k views

What is creating the utun0 network interface on OSX? What is for? What is it exactly?

What is creating the utun0 network interface on OSX? What is it being used for? What is it exactly? The interface only appears after connecting to the Ethernet or turning on the Wi-Fi and goes away ...
0
votes
1answer
117 views

How to change IP of VPN interface?

I have connected to a VPN on Ubuntu. and type ifconfig shows VPN interface has an IP of 10.10.0.11. Unfortunately, there is another computer in my lan whose ip is also 10.10.0.11 and they're ...
0
votes
2answers
87 views

What type of connector is on this NAS-like storage device?

I have a NAS kind of box, which I got it from my old office when they were moving out, at first I thought this was a simple Ethernet cable, but it is not. Any idea what this connection is? Another ...
0
votes
1answer
75 views

Assigning a Public IP for RaspberryPi in local area wired network

We are trying to configure RaspberryPi with public IP (192.248.10.71) in local area wired network. This is the network configuration in /etc/network/interfaces, auto lo iface lo inet loopback #...
0
votes
1answer
28 views

Virtual eth-adapter in networking-configuration

I have on my Debian en eth0-interface and I need the interface to listen to other IP's. I know I can create it with the following command ifconfig eth0:1 10.10.10.20/24 With this command everything ...
2
votes
2answers
1k views

Difference interface priority and metrics in windows

I would like to ask what exactly is the difference between the priority settings of network adapters in the advanced settings window of the adapter settings (adapters and bindings, like mentioned in ...
1
vote
0answers
216 views

Setting up a tap interface on linux

I'm using Scapy to learn how to craft packets however I seem to be getting some interference from the kernel when trying to do some specific operations. I have been given some advice to use a tap ...
5
votes
1answer
6k views

How to make tap interfaces persistent after reboot?

Some tasks requires having tap interfaces configured + assign ownership. So, I am doing it manually: sudo tuntap -u <username> sudo ifconfig tap0 up sudo ip a a 192.168.1.1/24 dev tap0 or ...
1
vote
2answers
982 views

How to create a virtual interface from a socks proxy?

I am wanting to create a network interface from a SOCKS 5 proxy on localhost. This will eventually be bridged with a wireless interface that I have which will be operating in AdHoc mode. This will ...
0
votes
1answer
119 views

IPv4 interface number

I came across a question in Self Test Software for MS Exam 70-642 Which command adds route to destination server, with IP address 10.51.0.0 and subnet mask of 255.255.0.0. Next hop should be 10....
3
votes
0answers
707 views

ForceBindIP not binding (Alternatives to ForceBindIP)

I'm working on Win7 x64, and I can't get ForceBindIP to work. I know it's an outdated software, if you have suggestions for a replacement, I'll be really thankful. Issue: When I call ForceBindIP from ...
0
votes
1answer
149 views

How to identify which USB devices are mapped to what network interface names?

When I plug in an USB network, it gets assigned a network name, like wlan1 by udev. Is there a way how to determine the mapping, without going through udev files, like /etc/udev/rules.d/70-persistent-...
1
vote
1answer
3k views

Install Ubuntu, eth0 not detected?

I have installed Ubuntu laptop Toshiba Satellite L640?, and I had difficulty, that is how to enable network interfaces, eth0 was not detected when running ifconfig.
1
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1answer
669 views

Does the physical interface name in Linux ever change?

When I see the man page for interfaces I see the below. Has anyone seen similar behavior, I had been using Ubuntu for some time and my net-books interface name has not changed for ever. The ifup ...