Managing and using network connectivity on a unix system

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3
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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 ...
1
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1answer
118 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
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 ?
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 ...
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 ...
3
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2answers
60 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 ...
2
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3answers
313 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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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 ...
1
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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 ...
-1
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1answer
24 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 ...
0
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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 ...
1
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1answer
62 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
38 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
24 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 ...
18
votes
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 ...
1
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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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2answers
59 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 ...
0
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0answers
17 views

Connect HDHomeRun directly to a computer and share with the rest of the network

I installed Linux Mint recently on my new Intel NUC. I would like to connect my HDHomeRun directly to the computer through the ethernet port and use the built-in WiFi as a bridge to allow the rest of ...
0
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0answers
22 views

i have ap-hotspot installed and working but only https sites can connect

I currently installed app hotspot on my linux-mint everything looks fine now but only https sites can be connected from my galaxy s4 phone such as facebook google etc. When i want to connect some ...
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 ...
2
votes
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 ...
3
votes
1answer
47 views

Force local IP traffic to go through LAN WITHOUT ip address changes

I post this question on serverfault a few days ago but i think it's more accurate here. I know there's some topics about forcing local IP trafic of a Linux machine to go through the LAN (over the ...
1
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1answer
21 views

How can I run a command on all cliennts at a time from the server that all are connected to NIS & NFS server?

NIS and NFS configured network. 1 NIS server, 1 NFS server, 50 NIS & NFS clients. OpenSUSE 13.2 Need to run a command on all clients from server machine. Command: an installation command on ...
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3answers
152 views

How to create a TCP listener?

Introduction: I have created a bash function that is able to check whether a port is available and increments it by 1 if false until a certain maximum port number. E.g., if port 500 is unavailable ...
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0answers
117 views

Huge packet loss on openwrt

I have a strange issue on mikrotik rb951-2hnd router. I firmwared it to openwrt a few years ago and everything worked fine. Just a few months ago I decided to update firmware. So I did it and ...
0
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1answer
44 views

Device shown using lspci but udev not loading the driver

My nic shows using lspci -v but udev is not loading the driver for it. Links to screenshots of diagnostic output are below. dmesg insmod lspci pacman -Qi ls /sys/class/net uname -a original ...
1
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1answer
25 views

Is there a way to have netcat listen and place incoming files in a destination directory?

I'd like to use netcat to regularly transfer files to a media server on my network. However, I can't figure out how (or if it's possible) to do something like nc -l 5959 > /media/data/, where ...
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0answers
54 views

Howto configure linux router to allow clients to use maximum bandwidth?

The problem is that I'm always limited on the final client machine to about 1/3 (one third,about 200/300kb) of the internet hotspot bandwidth when testing download speed with wget. I have configured ...
0
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0answers
38 views

Many Linux commands hang during execution, but system is alive [duplicate]

I can access the system through ssh, but many commands would hang, like the following: # ps axf Read from remote host 172.17.102.22: Connection reset by peer Connection to 172.17.102.22 closed. # ls ...
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0answers
35 views

Share WiFi internet over same WiFi adapter

I am trying to share internet through my WiFi adapter which is in use for connection to that internet. While I had Connectify license on Windows, I was able to do so: Internet from: My Wifi adapter ...
1
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1answer
176 views

Permission denied when trying to access mounted windows NFS

Full disclosure: I'm a complete noob with NFS and have very little idea what I'm doing. After hours of googling, I ended up here. I am trying to mount an NFS folder that I have set up on a WIN08 ...
0
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1answer
73 views

Leoxsys nano wifi adapter installation in backtrack 5r3/kali linux 1.1.0

I have leoxsys nano wifi adapter 150mbps using chipset realtek 8188ETV. It works fine in windows but not recognised in backtrack or kali linux via vmware workstation 9/10/11. When i gave the command ...
1
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3answers
107 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 ...
1
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1answer
36 views

How to Connect Different WiFi interfaces : 1 for external 1 for internal

I've built a Wireless Access point using hostapd and udhcpd. I have 2 WiFi dongles, one is used as wlan0 other is used as wlan1, I connected one of them to internet and other is keeping working as an ...
0
votes
1answer
174 views

Huawei E3372s + Linux (Rasbian), Incoming connections problem

I have a Linux-based OS (Rasbian) running on Raspberry Pi 2+ and it is using Huawei E3372s 4G/LTE USB Stick for internet connection. All my outbound connections work perfectly (Huawei USB mode ...
0
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1answer
16 views

How do I allow other physical machines on my LAN to connect to a web server hosted within my local virtual box windows VM?

I am running Windows Server 2008 R2 within Virtual Box v4 with os x 10.6 as my host. Within Windows Server, I am running IIS and I have successfully been able to access my web server with Internet ...
0
votes
1answer
71 views

Bridge and iptables postrouting

I have a Linux 3.14 PC with three NICs and a bridge between two of the NICs (eth1 and eth2). My Question Why is there no traffic passing through the POSTROUTING rule? FYI, traffic is passing ...
1
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1answer
58 views

Access Point offers itself IP if used as DHCP Server?

I'm trying to use an raspberrypi (OS=raspbian 4.0.7) I had flying around so I researched a little bit and everything seems to work more or less fine. I am using hostapd in combination with an wifi ...
0
votes
1answer
82 views

Why Gentoo detects no network devices? [closed]

I've faced the problem installing Gentoo: after the installation is seems to be completed and LiveCD is extracted, network becomes unreachable: gentoo~ # ping 8.8.8.8 connect: Network is unreachable ...
2
votes
1answer
73 views

“Network is unreachable”, github, bitbucket is not working

The output of ifconfig eth0 Link encap:Ethernet HWaddr 3c:97:0e:74:43:8e UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 ...
1
vote
3answers
193 views

Force all network traffic go through default gateway

I have a machine that I want to force all traffic to go through the default gateway. Even traffic on the local network. I have made it to work by removing the auto generated route for this interface, ...
0
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0answers
23 views

Internet connection drastically different for users

I am using Fedora 16, I know it's been EOL-ed but I've been too lazy to update and reinstall something new. Mostly, it works fine except that my main user's internet connection is really crappy and ...
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3answers
116 views

Impossible to have two network interfaces wifi and ethernet (as a backup) working together

I have a raspberry 2 with a wifi interface and an ethernet interface. wifi is my main connection with the ability to just plug in the ethernet as a backup method. I want to assign different static ...
0
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0answers
11 views

Trying to get the domain laptop.local to 127.0.0.1 with bind9

Already tried a load of guides but cannot figure it out somehow. I need it so that when I look at one of my webpages through a VM I do have to get the public IP of my laptop every time and so that the ...
1
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1answer
44 views

Is there any P2P VPN solution that does not requiere port opening(forwarding)?

The closest to a VPN P2P-based solution that I have found is PeerVPN: really easy to install, but it needs to open one port (7000 TCP by default) on one of the computers (also known as node) that runs ...
1
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1answer
51 views

What exactly do `/etc/network/interfaces` `up` and `down` commands do?

I am concerned that I may be incorrectly using the up and down interface options in /etc/network/interfaces. I was under the impression that these options were simply executed as a 'hook' after ...
0
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2answers
46 views

Send network traffic via a Windows VM on the same host to use corporate vpn?

At work we have a VPN solution that will only work on windows. I personally do not run Windows at home and run Linux (Ubuntu 14.04). I used Virtual Box to setup a Windows 7 virtual machine to run ...