Managing and using network connectivity on a unix system

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Realtek RTL8111 Network card not working on Ubuntu 14.04

I'm trying to install an Ethernet Card into my Ubuntu 14.04 desktop computer. Here is my lspci output (First one is my new ethernet card): 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. ...
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3answers
3k views

How to install Redhat using the iso image stored on Network

This is the case. I want to install the Redhat 5.6 on my system. But this time i dont want to use the actual DVD but this time i want to install it using the iso image stored on one of our server HDD. ...
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1answer
45 views

Set up interfaces file on Debian for Lan

A friend set up my Raspberry Pi so that it creates its own wireless network and I can connect to it through SSH over the air. The /etc/network/interfaces file looks like this: auto lo iface lo inet ...
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1answer
35 views

Loop commands to network daemon?

I'd like to feed a network daemon using a loop! To be more specific: There is a network daemon listening on localhost:portx. The daemon expects me to guess a PIN between 0000 - 9999. I want to use ...
4
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1answer
38 views

Turn off network on Raspbian

I'm trying to set up cron to turn off networking on my Raspberry Pi during the night (from 23:00 to 8:00). The problem is that none of this commands do the job: $ sudo service networking stop $ sudo ...
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4answers
62k views

Why the default eth0 interface is down by default on CentOS?

I am already a little bit familiar with Linux distros like Debian or Ubuntu (yeah, very similar) but I wanted to try Red Hat based - CentOS 6.2 . I have installed it on my Windows 7 host in virtualBox ...
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3answers
108 views

Internet connectivity issues due to wrong MAC address (using Linux Mint 17.2)

I am new to Linux. Today, I installed Linux Mint (17.2) and tried to connect to the internet via a broadband connection. My Internet Service Provider (ISP) provided me with a fixed MAC address that ...
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1answer
1k views

What do I need to add a virtual IPsec adapter?

I'm trying to set up an IPsec connection manually from the console with iproute2. What I need is a virtual interface (at best, a virtual IP address could also be sufficient) that IPsec-transforms ...
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2answers
1k views

Need to add virtual interface in Suse Enterprise Server edition permanently

How can I add virtual interface in SUSE Linux Enterprise Server 11 permanently?
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1answer
40 views

How to get systemd-udevd to create a bridge device at start up?

I am running Ubuntu server 15.04 in a virtual machine. I am able to use the brctl program to create and manipulate networking bridges. I've decided to persist the setup (through reboots) by updating ...
2
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1answer
31 views

How do kernel inform OSPF daemon when a physical interface status is down?

When a physical interface status is changed from up to down, there are 3 things related to the computer's current routing table and OSPF. The (connected) network for that interface and remote ...
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1answer
79 views

Routing tables with two network interfaces

When I try to access the internet with my raspberry pi via ethernet, it works, but when I do ifdown eth0 and try to ping any server outside my home network, it tells me connect: Network is ...
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37 views

enable/disable domain redirection

My router can be joined by clientes. enable // I'd like to redirect all trafic to an IP (13.37.42.1), I mean any IP and any domain. disable // Then I d like to be able to disable it. Then clients ...
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0answers
46 views

Difference between MTU for a route and MTU for an interface

There is a server I connect to over the WAN and somewhere over the route there is packet loss unless I set the interface MTU to 600: ifconfig eth0 mtu 600 Doing this causes problems with ...
2
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1answer
57 views

TFTP times out when connecting to Docker server

I'm trying to install FOG in Docker (via boot2docker for Windows) at my workplace as a bit of a learning exercise. FOG has a handy little script that installs everything for you, and that works great ...
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0answers
51 views

atheros driver on arch-linux won't start access point [closed]

Can't create access point on arch % lspci -k | grep -A 3 -i network 06:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01) Subsystem: Dell Device 020c ...
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33 views

Linux VM as a firewall

I have 3 vms a->b->c. I want to setup b as a firewall. Traffic is routed from a to c through b and I put a file on c. How do I show that b works as a firewall (first show that you are able to transfer ...
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34 views

Browser is ok but can't direct internet through a shadowsocks server

Ok it seems an easy thing but I just couldn't make it work after lots and lots of searching. I have Ubuntu 14.04. This is config.json file including configurations of my friend's server running ...
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0answers
13 views

Wi-Fi Sabrent PCI-8021N Linux Debian Jessie _x86_64 using ralink firmware/desktop

I've been trying since Thursday to get a sabrent card to come up and show what wifi networks are available. I'm in midtown Atlanta...so seems there should be 1 or 2 networks showing. The card's power ...
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0answers
17 views

How can you remote boot over InfiniBand?

If I have InfiniBand adapters in two computers, an InfiniBand cable between them, and all of my hard drives in one of the computers running the necessary host software (iSCSI/SRP/etc), how would the ...
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0answers
64 views

How to get an RPi2 running Kali to tether to an iPhone 5S?

I’ve got Offensive Security’s version of Kali Linux running on a Raspberry Pi 2 and I’m trying to tether it to an un-jailbroken AT&T iPhone 5S. From my research it looks like I need to install ...
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2answers
162 views

Keep losing resolv.conf configurations

Every time i reboot raspi this resolv.conf files is cleaned. i normally add on this file the openDNS ips like below: # OpenDNS IPv4 nameservers nameserver 208.67.222.222 nameserver 208.67.220.220 I ...
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7answers
2k views

Why compute checksums of downloaded files?

I often see a checksum given next to a file available for download. The purpose of this practice eludes me. It is obviously to detect corrupt files, but what could be the cause of this corruption and ...
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1answer
17 views

Enabling proxy_arp for interface eth2.1

Am trying to enable proxy arp for some of the interfaces, with the normal interface name eth0, eth1, etc [root@eth2.1]# sysctl net.ipv4.conf.eth0.proxy_arp 0 But for interface names such as ...
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3answers
12k views

I always need to ifdown/ifup wlan0 after reboot

I'm trying to create an ad-hoc wifi made of 5 computers (one windows pc and 4 raspberry pi loaded with a raspbian) the raspberry pi will talk through mqtt, but tha'ts not the point. The problem I have ...
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0answers
31 views

Can't ping another router in my network (OpenWrt)

I'm playing around with OpenWrt and followed this tutorial step by step to set up a mesh network: http://wiki.openwrt.org/doc/howto/mesh.80211s Problem: When I got to the end and ran these two ...
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3answers
5k views

Multicast UDP not working

Multicast UDP on raspberry pi I haven't narrowed things down enough to know if my issue is because of debian, raspbian specifically, or if I am just missing a something completely. I have a python ...
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1answer
27 views

OpenVZ machine's venet0 network suddenly down

I have setup a further OpenVZ container with the following network setup: venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:192.168.10.168 ...
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2answers
55 views

Disable DHCP without altering 'interfaces'

I have a bunch of RPis running in read-only filesystems that are not able to modify the /etc/network/interfaces file. As of right now, they load their configurations off of a USB stick and use ...
0
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1answer
28 views

How to send a NDP message?

I would like to send a NDP ( Neighbor Discovery Protocol ) message from my Mac on the network to discover which device is available or not. How can I do this ?
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1answer
120 views

Two network interface(eth0 and eth1) of same linux machine can't ping each other

I have one linux machine having two gigabit network interface. I want to run the traffic test like iperf on two interface, eth0 will be server and eth1 will be client. I connected back-to-back network ...
0
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1answer
33 views

Virtual NIC's in Linux?

How do I create a VNIC interface in linux? What I want to do is create an interface that is linked in some way to a physical interface but functions in its own namespace. I know the physical ...
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4answers
10k views

TFTP configuration problems

I can not get TFTP to work properly on my system. I have set /etc/default/tftpd-hpa to /srv/tftp/ which I have set to permissions 777 like all the contents as well (and /srv/ too) however, whenever I ...
3
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1answer
501 views

Simplest way to set up multiple subdomains to separate VMs running on single host

Problem: I´m planning to set up several virtualized centos, rhel or ubuntu guest machines on a single centos host server (most likely using KVM). Each guest VM is running an instance of a webapp + ...
2
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3answers
63 views

Is there a command to deny an IP

Looking at the access log I found excessive access from an IP address. I then edit either .htaccess or .conf files to deny access from that IP. I wonder if there is a command or a oneliner that can do ...
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3answers
315 views

Chat from one system to another in a terminal

I would like send a chat message (like mail chat) between two systems, the systems are inter-connected proxy IP.
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2answers
63 views

Do I want a Repeater or a Bridge? (OpenWrt)

I'm setting up a network with openwrt. I have a router that I have set up for wifi which I will use as an access point. I want to add another router to my network so that the two can exchange traffic ...
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1answer
25 views

Transmitted packets on a LAN interface may increase received packets on WAN interface?

Supose a simple home router gateway and the following: lan0 - Network interface responsible for LAN-side of the router wan0 - Network interface responsible for WAN-side of the router A default route ...
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2answers
48 views

How to change the last IP digits on linux command line

I'm trying to change the last digits of the IP address that I got stored as a variable ip=$(ifconfig eth0 | grep "inet addr" | awk -F: '{print $2} | awk '{print $1}') The output would be ...
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0answers
30 views

Pinging between Mesh Network Nodes OpenWrt

I have two mesh nodes that I have configured to be on a mesh created using OpenWrt. I used the tutorial here to set that up. When I ran iw dev $MESH_IFACE station dump, I got the output that I ...
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1answer
65 views

Arch Linux: Despite ot static ip configuration I get a DHCP address

This is very strange to me. On my Raspberry Pi running the latest Arch Linux I disabled all the DHCP service on ETH0 and everything else DHCP: rm /etc/dhcpcd.duid pacman -R dhclient pacman -R dhcpcd ...
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0answers
15 views

Authentication shared over multiple systems [closed]

TL;DR I'm looking for a software that allows authentication shared over multiple systems to be used for authorizing access to all devices connected to a network. Any advice, recommendation inclusive ...
0
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1answer
39 views

Simultaneously operate on multiple wireless networks

I'm running an Ubuntu 14.04 server. For an experiment I'm running I have the following requirements: -Receive data from multiple (3-4) wireless networks. -Machines on a network will only need to ...
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0answers
51 views

Change timeout of an entry of ipset with iptables rule

I'm trying to create a set with ipset and using it in some iptables rules. ipset has timeout option to set a countdown timeout to an entry of a set to automatically remove it after a period of time. ...
1
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1answer
25 views

Estimating time to send a single file with fixed network throughput?

Let's say I have several files with different sizes (10KB, 100KB, 1MB, 10MB, 100MB). Starting individual transfer of those files over 2MB per second network will return different final throughput ...
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0answers
31 views

Prevent Chromium/Chrome from displaying URLs under certain directories

I'd prefer a low-level approach, e.g. changing the hosts file would be perfect (but AFAIK only domains, not directories can be rerouted there). I'm looking for a way to block ads without resorting to ...
2
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2answers
60 views

Linux network stops functioning after random time (wired)

I'm unsure if this is hard or software issue but I really need to find out. I was running Windows 8.1 for some time, then swapped to Linux mint with kernel 3.13 which worked fine. I updated kernel to ...
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1answer
31 views

How to direct host's browser to guest VM?

Host - Windows 7 Guest - CentOS 7 I have set up a CentOS VM using VMware Player. I can now connect to the internet (ping google.com, install packages using yum are all successful) after changing the ...
2
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1answer
72 views

How to connect CentOS virtual machine (on VMware) to the internet?

I have set up VMware and installed a minimal CentOS (my laptop's OS is Windows 7). But cannot connect to the internet. Eventually I tried following this guide but still no luck. Trying to ping a ...
0
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1answer
12 views

dig domain replay SOA

I have a domain and when I use dig jeeja.biz it just gives me my server ip address. ;; ANSWER SECTION: jeeja.biz. 13914 IN A 209.15.212.171 But when I use the same command on another ...