IP stands for "Internet Protocol". It is one of the fundamental protocols that powers the internet. IP is how data is able to be routed to the correct destination - your computer is assigned an IP address, and when you need to get data back, that data gets sent to your IP address.

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RapidIO packet filtering in Linux

I was wondering if there is support in Linux Kernel for RapidIO packets filtering, something similar to iptables, but based on RapidIO header?
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2answers
468 views

How to know ip camera address

I have ip camera with static ip address preset. How can I know it ip using linux? I connect camera direct to my notebook. My system is Linux machine 3.5.7-gentoo #2 SMP ifconfig eth0 eth0: ...
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1answer
87 views

How can I be sure that access to my home server from my home network is not done via Internet?

As advised in this question: Network file-sharing between Linux and Android, I have decided to use ownCloud to store files on my home cloud server. However, my needs have changed a bit. I want to be ...
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2answers
316 views

is it possible to send the remote connector ip via netcat?

Actually I want to make something like ifconfig.me functionality but only for my internal network. I see it the way smth on server listens some port and send ip of connected remote machine. Seems nc ...
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1answer
217 views

centos httpd.conf set different ip for a directory

I have 3 IPs in my server, i want use them to increase twitter API limits. How to set a different ip for a directory in centos 6.1 httpd.conf (apache 2.3.1) I added these line in the bottom of ...
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1answer
69 views

privoxy show client ip when sending mail

Is it possible for privoxy to show original client ip when sending mail ( example: this mail header should show the client's ip not the proxy ip: Received: from [xx.xx.xx.xx] by ...
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2answers
2k views

Checking if I can reach some ports from my computer

Is there a terminal command or something on OSX that I can use to test if I can reach some ports on a remote server? I know these ports are reachable on that server, because I can access them from ...
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3answers
1k views

how can I find out my server's subnet mask via SSH

Hi I use media tamples dv server... I connected it via SSH with putty.. I need my server's IP address and subnetmask. I know the IP address but I don't know the subnetmask. How can I find out my ...
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139 views

QEMU communication between a process on a host and a process on the guest

I am running Ubuntu virtual machine using QEMU. Right now I am facing a problem how to send IP packets from the host OS to the guest OS over some virtual network interface throw QEMU. Virtual ...
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1answer
54 views

switch network on and off of a virtual remote server

I need to perform a testing panel which disconnects a network cable and connect it again on a specific virtual server via a php web page. I found that ip & ifconfig can disconnect a network, but ...
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Parsing log files for frequent IP's

So, I hacked this together while undergoing a DDOS attack to pull naughty ips out of my logs. Anyone have any improvements or other suggestions to make it better? Here's the general idea: pull ...
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2answers
108 views

Assigning IP to a bridged interfaces

Is there a way to assign an IP to bridged interfaces? For example, under normal circumstances: ifconfig eth0 0.0.0.0 ifconfig eth1 0.0.0.0 brctl addbr mybridge brctl addif mybridge eth0 brctl addif ...
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1answer
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How to add Two Gateway on same machine

I have one test server that has Two Interfaces. To one interface i have assigned ip 172.16.122.1 and GW 172.16.xxx.xxx Now i connected cable to second interface and gave it ip 10.2.2.98. Now they ...
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3answers
140 views

Detect which interface traffic to an IP address goes through

I'm making an script, and I need to detect in what interface is the traffic of an IP going through. This is because in the arch, an IP address is attended only for one of four NIC's, but can be any of ...
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2answers
777 views

How to allow mysql remote connections via particular interface

I have a 10.237.49.251 IP on eth0 and another IP on another interface How do I enable remote mysql calls on eth0 device?
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3answers
71 views

Can DNS identify hostnames dynamically if they're statically configured?

I've got a small environment of ~40 VMs with static IPs on 12 servers, it would be dandy if I could refer to each VM by name. We have a lot of VMs come and go, so maintaining one static list is a ...
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1answer
153 views

Restoring default ip rule

I accidentally issued ip rule flush, now the default ip rule are all gone, which is, 32766: from all lookup main 32767: from all lookup default Anyone know how to add them back?
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4answers
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How to find the IP address of a KVM Virtual Machine, that I can SSH into it?

I have follow this guide (Virtualization With KVM On Ubuntu 11.10) to setup my KVM (Virtual Machines Software) on my Ubuntu 11.10 Server. However, I didn't setup my VM's IP address when creating the ...
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2answers
92 views

How do Apache2 VirtualHosts get resolved?

As I understand it, when you request a url from a website using your browser, it asks the DNS server that the OS is pointing at if it knows the ip address that relates to the dns-name of the server; ...
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4answers
112 views

how to know IPs available on a server?

I think there used to be a command to do that but I forget. Something like ipconfig in windows. My server has 10 available IPs and I want to know them all.
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1answer
422 views

No DNS on Debian wifi after unplugging the DNS cable

I have installed wheezy Release Candidate 1 to my old laptop (Benq Joybook A52) right now, and I have some problem with my wireless card (Atheros 5006). It can actually see the wireless networks, I ...
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1answer
227 views

Alternative to mrouted for DVMRP on Debian Squeeze

I need to implement DVMRP protocol to route multicast over Openvpn (tun) connection for some old 3Com NBX phones. I use Debian squeeze so mrouted is not available (obsolete). What can I use ...
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1answer
746 views

With two interfaces, how can I make one the default route and the other an alternate?

I have wired connection to intranet / lan of my work (with proxy) and one wireless without proxy that doesn't have access to the office lan. (Like Guest Wifi) My idea is to route all traffic to eth0 ...
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1answer
337 views

Kickstart: one network card with DHCP, one with static IP?

I am using Kickstart to automate a CentOS install. I wanted one of the interfaces to have static IP so I wrote - network --onboot yes --bootproto static \ -ip="intended IP" -netmask="intended ...
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1answer
104 views

Help understanding interfaces in Backtrack

I am fairly new in UNIX and have recently installed backtrack on a VMWare box on my machine and I am trying to use DHCLIENT command but am having trouble in understanding the interfaces. I am ...
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1answer
180 views

Unable to get embedded device to ping anything on the network

I have an embedded device, built using buildroot, kernel version 3.6.11 running busybox. The kernel is built with completely default options. I have configured the device according to what the network ...
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2answers
499 views

Is /etc/resolv.conf needed when using a static IP address?

I am trying to configure the IP address of my embedded device. The device should have a static IP address and I attempt to set this using the /etc/network/interfaces file with iface eth0 inet static ...
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2answers
519 views

Heartbeat with virtual IP at Ubuntu 12.04

I have installed heartbeat package at both linux devices so that when ever clients request a service they will be arrived to this IP, and client will not know what are the back-end/actual ip addresses ...
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3answers
9k views

How to find out if Ubuntu is using DHCP (Ubuntu 12.04 LTS GUI)

How can I find out if my IP address is DHCP, Fixed or Dynamic? I need to tell my network administrator what the IP address is, that my Virtual Machine is using. I know the numbers, but I don't know ...
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2answers
710 views

Use a specific interface for a specific destination subnet (source IP setting)

I am looking for some sort of routing trickery to set a specific source IP: Local machine has two IPs; Eth1: 192.168.0.1 Eth1:2 192.168.0.2 Default gateway is 192.168.0.254 via Eth1 Remote subnet ...
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4answers
11k views

How to remove all default gateways

I'm commanding a customarily built linux machine so not all linux commands are available. I execute network related commands so I need to set a default gateway right before I run my command, then ...
3
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1answer
418 views

set VM IP address to be the same every time from DHCP on CentOS 5.6

I have an issue where, each time I start my CentOS 5.6 VM, DHCP (I believe) is allocating my VM a different IP. I have the VM mapped as a Samba share in Windows 7 and this changes between 192.168.0.8, ...
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1answer
920 views

What to use for firewall testing (port opened or not)

so... we know that we can test that if a port is open on the firewall with: telnet SERVERIP PORT ..but afaik there are services that can't be tested with telnet, because ex.: telnet doesn't know ...
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4answers
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How do I know what service is running on a particular port in linux?

I am trying to run weblogic server on my linux machine and I am getting the following error : ERROR: transport error 202: bind failed: Address already in use ERROR: JDWP Transport dt_socket failed to ...
2
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1answer
278 views

Running a local port scan and found open ports but, don't know what they're used for?

I wrote a very basic python script to port scan my system. I'm running linux-mint lisa: open_ports = [] for port in xrange(65536): conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM) ...
2
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1answer
8k views

Unable to ping gateway & other Linux boxes on same network

I'm somewhat new to Linux, but I'm trying to network a few Linux machines. I can't seem to be able ping the gateway or the other Linux machines. My scenario: I have a few Linux boxes set up on a ...
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3answers
3k views

Can't access select https sites on Linux over PPPoE

My internet connection used to be a direct LAN connection to my provider. Back then, everything would load fine on both Windows and Ubuntu (dual boot). However, a while ago they started needing me to ...
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2answers
500 views

Discover MTU between me and destination IP

In a case I can use only UDP and ICMP protocols, how can I discover, in bytes, the path MTU for packet transfer from my computer to a destination IP?
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2answers
1k views

“system-config-network-tui &” doesn't work

When I try to edit or assign the IP using this command: system-config-network-tui & Terminal opens a console which is uncontrollable, just like this: This happens on CentOS and Red Hat.
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3answers
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How can I know if IP Multicast is enabled

I have scripts that run IP multicast tests; however, my scripts are failing on a particular linux machine. I know that I can look at CONFIG_IP_MULTICAST in the kernel configuration file to determine ...
8
votes
1answer
3k views

Linux always send ICMP redirect

I have several Debian Squeeze (6.0.6 up to date) used as routers. When a link is down, they send ICMP redirects to local hosts. This is the default behaviour of Debian and several others. So once the ...
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2answers
130 views

What's the mechanism that a process listening to localhost refuses to process a request to its LAN IP address?

The private IP address of my machine is 192.168.44.182. If I started a process using nc -l localhost 20000 Then this process won't handle requests sent to 192.168.44.182. Since the process ...
2
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1answer
382 views

ICMP destination unreachable

I am working on an Arch Linux machine with an ethernet interface eth1. I have created the interface eth1:0 using ifconfig and given it a dummy hardware address (00:01:02:03:04:05). When I send a UDP ...
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2answers
1k views

How to know if a network interface is tap, tun, bridge or physical?

As far as i know, there are 4 main types of network interfaces in linux: tun, tap, bridge and physical. When i'm doing sys admin on machines running KVM, i usually come accross tap, bridge and ...
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1answer
1k views

ubuntu server 12.04 lts is there a way to enable sleep mode and wake on lan?

I was wondering if it were posible to make my server go to sleep after a set period of time, but still be listening for lan requests. I use my server as a media server that might get used 3 or 4 hours ...
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1answer
1k views

What is the GNU/Linux equivalent of BSD's “route get …”?

The BSD route command has a feature that will show what route will be selected for a given host. For example: /Users/mhaase $ route get google.com route to: iad23s07-in-f8.1e100.net destination: ...
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1answer
2k views

multigateway routing for specific src port

I have two gateway to access internet, somehow I want to load balancing it, so far its working, but some connection or service need persistent gateway IP to be used, so the client should never change ...
2
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1answer
2k views

u-boot disable DHCP requests with setenv

I am trying to disable the DHCP requests after the Kernel was loaded. Using freescale imx25 dev-board in standard config. In u-boot, I find two lines ip=dhcp: MX25 U-Boot > pri bootdelay=3 ...
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2answers
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Configure a bridged Ethernet adapter in a VirtualBox guest running Scientific Linux

I installed Scientific Linux 6.2 x86 in VirtualBox on Windows 7 x64. The adapter is Adapter 1: Paravirtualized Network (Bridged adapter, Marvell Yukon 88E8056 PCI-E Gigabit Ethernet Controller) ...
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2answers
264 views

How to force a connection to a certain host to use to a specific source IP?

When using the Shoutcast2 yellowpages there is a really annoying issue that it always uses the default IP the system uses for an outgoing conection to register itself even if the server is configured ...