hardware (or its representation by software) that connects a computing device (host) to a computer network (net)

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2
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1answer
23 views

Network UNCLAIMED - Unable to access internet

My Kubuntu was working well until I think a day ago, and suddenly I don't have access to Wi-Fi. I've tried turning on the connection via the Connection editor but the box was grayed out. After looking ...
1
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2answers
50 views

What exactly happens in Linux internally when an ethernet cable is connected?

I would like to understand what exactly happens when a cable is being connected to the Ethernet port (assuming dynamic IP addressing): What services are being run and how are they triggered? What ...
1
vote
1answer
42 views

Enable Promiscous mode in CentOS 7

How to enable promiscuous mode on network adapter. I have tried by adding PROMISC=yes in /etc/sysconfig/network-scripts/ifcfg-ensxxx but no effect even after network restart or rebooting the system.
2
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1answer
38 views

How do I disable network interfaces from loading at boot without Network Manager?

The machine I'm using has 4 network interfaces, only one of which is currently being used (the other 3 are not plugged in at all). Currently when the machine is restarted it is delayed by a few ...
4
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0answers
33 views

Is it possible to set interface name permanently in Raspbian?

I'm using 2 wifi dongles. First one is used to monitor and second one is used to access internet. Even if I changed /etc/udev/rules.d/70-persistent-net.rules as below, at startup sometimes wlan0 ...
2
votes
1answer
58 views

Device eth0 does not seem to be present, delaying initialization

I have cloned a fedora and now trying to configure network interfaces. Every time i am adding a new NIC, it starts with number eth3 (rather eth0). i have tried removing and modifying the ...
0
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0answers
10 views

installing r8168 driver in centos 4.8

I have installed cent os 4.8 and I am not able to connect to internet from that system. After searching on the net I found that the system has r8169 driver instead of r8168. Now I am trying to ...
1
vote
1answer
51 views

ifconfig not showing ip address under eth0

Usually when I connect my raspberry pi to my laptop using an ethernet cable, the ifconfig command in each computer would show the ipaddress of each computer under eth0. I recently got a new raspberry ...
0
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1answer
38 views

Set a local static IP address on a network interface and have it permanent even after restart

I have openSUSE 13.2. My laptop connects to the internet through a WiFi network but I have an embedded device which I need to connect to it through the ethernet interface. It has an IP address of ...
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0answers
17 views

Change of Network Interface using Metrics

I want to achieve dynamic interface change between eth0 and wlan0, one solution I am looking into is to change interface metric. Different than this question, I don't want to make any change to ...
0
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0answers
23 views

command line tool group chat utility under linux

I am working on mac osx Yosemite. I want to reach to a user under a certain IP address. (It might be local network or thru internet). I want to do it thru terminal using the default tools that ...
2
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0answers
35 views

How to update ip in hosts file automatically from a VirtualBox guest?

I have a VirtualBox guest running Debian with Bridged Adapter. The host is running on Windows 8. I would like to connect from the host to the guest through a specific port. I came up with the ...
1
vote
1answer
26 views

What is a hotplug event from the interface?

According to Debian Network setup document allow-hotplug <interface_name> stanza in /etc/network/interfaces file starts an interface when the kernel detects a hotplug event from the interface. ...
0
votes
1answer
25 views

Connect through different interfaces to the same server

i have two pppoe interfaces - ppp0 and ppp1. I would like to reach the same server on both interface. I added the desired ip address to the route table: route add 10.88.40.13 ppp0 And I could ...
1
vote
1answer
22 views

I need dhclient to flush IP address/routes when link goes down

I am running one Ubuntu Server 14.04 with network configuration using /etc/network/interfaces and so ifup/ifdown scripts. I realised that if I configure one interface in DHCP mode, then I unplug the ...
2
votes
0answers
58 views

Where does BPF packet capture read its data from?

I am interested in the low-level interfacing with network packets. From what I read, tools like tcpdump and libpcap use the BPF packet filter device /dev/bpf* to read link-layer network packets (on ...
1
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0answers
12 views

Fair traffic classification using TC

I want to apply a qdisc I developed on myself (quite similar to netem. Think netem.) to several IP-addresses using the filter classifier. No problem this far, I could do so using the prio qdisc or HTB ...
0
votes
1answer
30 views

How do I limit inbound and outbound bandwidth to and from a specific host on CentOS

As the title says, I am trying to limit inbound and outbound bandwidth to and from a specific host on CentOS. The reason is that this host consistently uses a large amount of bandwidth and this needs ...
1
vote
1answer
32 views

Possible to reserve a network interface for exclusive use?

Like the headline says: is this possible in Linux at all? How would one implement a completely silent packet sniffer? I would like to take the interface away and give it back to the OS at will, if ...
0
votes
1answer
96 views

Problem with routing tables network interface in Centos 6.6

I've problem with the routing tables, I've 2 network interface. (2 interfaces with 2 difference network address IP address: 112.xxx.xxx.xxx: static IP and 10.xxx.xxx.xxx local IP) 1: IP address is: ...
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0answers
21 views

net scripts try to up old physical removed network interface

Situation: Gentoo with kernel 3.8.4 amd64 udev 218 no systemd, no initram, no old network udev rules Previously 3 network interfaces (2 x onboard, 1 pci , all r8189 module ones) After an short ...
1
vote
1answer
76 views

Permanently disable IPv6, for a given interface?

I'm looking to permanently disable IPv6 on a specific interface because it's broken and my question on Superuser to fix it is dead so how can I go about doing that? I've added ...
1
vote
1answer
141 views

CentOS 6 interfaces bonding, round-robin instead of active-backup, duplicates frames

Two interfaces, eth0 and eth1 are part of a network bonding bond0 on CentOS 6. All worked well under CentOS 5, but after the upgrade to CentOS 6.6, keeping the same configuration, the network works ...
0
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0answers
95 views

How can I run script without root to sniff network (libpcap)?

I have a script (in ruby): require 'ffi/pcap' pcap = FFI::PCap::Live.new(:dev => "wlan0", :timeout => 1) pcap.loop() do |this,pkt| puts pkt.body end When I try to run the script , I get ...
1
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2answers
30 views

Virtual interface and different IPs

I've created a virtual interface on wlan0 with the ifconfig comand and here is what I have: wlan0 Link encap:Ethernet IndirizzoHW c4:46:19:69:b7:a5 indirizzo inet:192.168.1.4 ...
-2
votes
2answers
71 views

How can I find the name of my Network Interface [closed]

I have a project that requires me to scan the local network. I found a program on the internet that allows the local network scanner condition, but I brought the gold @ IP argument in my network ...
0
votes
0answers
6 views

RHEL 5 box constantly displaying NIC statistics on console screen, how can I disable this?

I have a RHEL 5 box that is constantly displaying nic statistics on the console screen when using the KVM. This makes it very hard to do any troubleshooting when the box goes down as these statistics ...
1
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0answers
68 views

Unable To Bridge Two Teamed Interfaces - Advice?

Before the wall of code I'll explain the situation. I'm trying to set up two interfaces to be teamed together, and from that team create a bridge. I've been studying for the RHCE and I believe this ...
0
votes
1answer
26 views

Can't connect Wifi devices to router when wired Ethernet computer is connected

I have a arch desktop with samba and ssh configured connected to a WiFi router/ADSL2 modem via ethernet. I was not able to connect any of my mobile devices (phones and tablet) or my netbook (running ...
1
vote
1answer
57 views

Link Local IPv6 address keeps being automatically assigned

I'm looking to prevent the IPv6 link local address from being randomly assigned. I'm not looking to disable v6 but rather statically assign my own link local. I've done ifconfig vboxnet0 inet6 add ...
0
votes
0answers
28 views

Manual network setting on Solaris 10

Am using Solaris 10 on Virtual Box. While installing I chose to assign IP manually. IP address: 192.168.1.46 Subnet: 255.255.255.0 Gateway: 192.168.1.1 Now when I ping my Solaris machine with other ...
1
vote
1answer
65 views

Unable to connect to internet from Centos VM

I am using VirtualBox 4.3, I have installed centos 6.3. I have two adpaters attached. 1) NAT 2) Host-Only I want to be able to setup a cluster of 3 machines which can talk to each other and also be ...
0
votes
0answers
48 views

Is there a way to find the uptime of a network card in unix?

Some of the information i am requesting can be gleaned from /var/log/syslog , e.g: grep wlan /var/log/syslog But the usefulness of that information also depends on how you are network connecting; ...
0
votes
1answer
91 views

Run daemon on startup in Debian once openvpn connection established

I am using raspbian. (Debian variant). By default, openvpn is started with /etc/rc2.d/S03openvpn. I set up an /etc/init.d script with a symlink /etc/rc2.d/S04daemonname for a daemon I want to start ...
3
votes
1answer
29 views

setting or changing the default ip address

I'm a unix newbie, just know enough to be dangerous. I have a SUSE server and recently added a second IP address (ending in .159) by editing the config file below. It works, however now all the ...
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0answers
46 views

ping on linux vs ping on mikrotik

I have ubuntu server 14.04, with two network cards (LAN and WAN). I made a masquerate for WAN card. I have internet access from a host within the Lan of router. I do a ping to 8.8.8.8 and try to ...
0
votes
1answer
102 views

RHEL7: Why does 'nmcli conn show' & 'ip addr show' display different connections?

My 'nmcli conn show' & /'etc/sysconfig/network-scripts' config files don't match up, showing just one connection/devices of each: [root@ciroc network-scripts]# ls |grep ifcfg ifcfg-enp0s3 ...
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0answers
44 views

How was dnsmasq answering DNS queries before I fixed /etc/network/interfaces?

I installed dnsmasq to provide both DHCP and DNS on my home network. Everything was working swimmingly until just now. Seemingly out of the blue I was unable to connect to the internet on any ...
0
votes
1answer
45 views

Linux Virtual Network Interface: Specify a Specific DHCP Server (or DHCP Server in an Address Range)?

I'm setting up a Linux box for a friend. She lives way out from the city and has to use dial up, but sometimes she can bring the computer into town and connect on my LAN or on someone else's LAN. ...
0
votes
1answer
100 views

Disable rate control in linux wireless driver

I need to evaluate the performance of a few wireless cards at different bitrates. I found out that "minstrel" algorithm continuously adjusts this rate. Can someone point me to 'how I can manually ...
1
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0answers
31 views

Interface on Linux for IP range to divide incoming traffic

In order to divide incoming traffic I use the "ip link" command: ip link add link eno1 name eno1.vlan10 type vlan id 10 I want to do the same for a network range, so that I have a named interface ...
0
votes
1answer
27 views

Dynamically assign outbound network interface

I'm establishing a network connection with wvdial (PPP) and I want to assign this as the outgoing network interface AFTER it is established. The connection is being established by a bash script and ...
0
votes
0answers
59 views

connman connections extremely flaky and slow

I'm trying to configure my system to be able to connect via either ethernet or wifi with connman. I was able to hotplug my ethernet with systemctl restart dhcpcd.service previously, but I'd like to ...
0
votes
0answers
60 views

Ethernet only works when PC booted with cable plugged in

My Ethernet adapter is Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06) and I'm using x64 Arch Linux, kernel 3.18.4. Connections are managed using ...
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0answers
64 views

ssh into fedora inside virtual box over internet

I am running fedora server in a virtual box inside a windows 7 host. I can ssh into fedora from this windows 7 host. How ever, I stay out of my place most of the times with a laptop at my disposal, ...
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0answers
18 views

Spoofed mac resets to default when connects to network

I'm trying to change the mac address of the wifi card. I tryed with both ip link set wlan0 address XX:XX:XX:XX:XX:XX and macchanger, and I'm able to change it, but when NetworkManager try to connect, ...
0
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0answers
47 views

Can I use kickstart to assign multiple ip addresses to a device

Can I use the kickstart network statement to assign multiple ip addresses to the same network device? E.g. I have a server that I install using kickstart. The server has one network card, but I want ...
3
votes
1answer
130 views

Strange ip command output

When I call ip addr show I get output with all interfaces and their IP addresses (look at eth7): 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback ...
2
votes
1answer
161 views

proper syntax to delete default route for a particular interface?

summary: me@client:~$ sudo route del default ppp0 SIOCDELRT: No such process me@client:~$ sudo route del default dev ppp0 SIOCDELRT: No such process me@client:~$ sudo route del -net default dev ppp0 ...
0
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0answers
28 views

Painfully slow LAN ftp/smb/ssh less than 5kib/s

I have (finally) gotten my home server up and running. After installing/trying dozens of GNU/Linux builds I have landed on Open Media Vault for my main server, Mint 17.1 on my Laptop and I have a ...