the IP protocol and IP addresses

learn more… | top users | synonyms

1
vote
0answers
217 views

Setup public IP address on LXC container

Can anyone tell me how to setup a network interface for each LXC container so that each container can have its own dedicated IP address? Here's what the /etc/network/interfaces file on my host node ...
1
vote
2answers
376 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 Bcast:...
1
vote
1answer
459 views

Not able to resolve IP address for eth1 in Vagrant VM

On runnning ifconfig command I get the following as output. I need the IP address of eth1 for running my python server port with. eth0 Link encap:Ethernet HWaddr 08:00:27:CE:08:3D ...
0
votes
1answer
80 views

How to access a inet6 address from browser

I have installed a pre-built Virtual Box image on an OS X host, and started it up. It's running Ubuntu 12 and Tomcat. From within the box the adapter information only contains an inet6 address (see ...
1
vote
1answer
86 views

How does Linux prevent applications from sending more packets than the link can handle without dropping packets?

I couldn't make the question any clearer so here's an example scenario: Given a Linux machine connected to an IP network through a physical interface of bandwidth 10Mbps (or a higher speed interface ...
1
vote
0answers
267 views

Network tool to monitor IP packet fragmentation

Is there a tool, similar to iptraf, that would let me see how many incoming/outgoing IP packets get fragmented/defragmented, and what percent of traffic they are? I know this can be counted with the ...
1
vote
0answers
192 views

IP packets fragment randomly

I've observed the strangest thing - the same packet, same size, send through the same interface sometimes gets send whole, and sometimes gets fragmented, as if it exceeded the interface MTU... 1472 ...
4
votes
1answer
645 views

why are there different formats for the hosts file between OpenSuSE and Ubuntu?

How is 127.0.0.1 related to 127.0.0.2? Using ssh to login to tleilax (OpenSuSE): tleilax:~ # tleilax:~ # hostname tleilax tleilax:~ # tleilax:~ # hostname -f tleilax.bounceme.net tleilax:~ # ...
-1
votes
1answer
466 views

Why 192.168.1.105 = 127.0.0.1 in my pc?

I have installed apache2 in my debian7.8 . When to input 192.168.1.105 in firefox i get the same output as 127.0.0.1 ? It works! This is the default web page for this server. The web server ...
1
vote
0answers
75 views

What is the first event/file/log in linux that appears/changes on boot that signalizes network being up?

I have a vSphere farm with virtual machines and python script that handles cloning and managing of those VMs. I also have a machine (RedHat 6) that I clone if I need a new one. It has a script that ...
1
vote
1answer
63 views

Unix Program (not ab) to create local requests to local server with different IP addresses

I made a module for apache and want to test it across thousands of different IP addresses in a short time. Currently, my only option is to integrate the module onto a live server for which I have ...
0
votes
1answer
119 views

Invalid IP parameter on nginx setup

I'm currently setting up an an nginx web server with PHP on ubuntu 10.x lastest. I've set it so it will only use my local LAN for testing but it comes with invalid paramter for 192.xxx.x.0/142. My IP ...
3
votes
3answers
4k views

What's the difference between a machine's IP address and localhost

It is silly stupid question for you all. But until i know the answer , it is difficult for me. Doubt has raised from my another question Where if i give localhost to my path, it works. But it doesn't ...
1
vote
0answers
41 views

Is dynamic DNS the only possible way to establish a connection between two routers with temporally IPs?

the situation is as follows. My and my friends Pcs are connected within a WLAN with a local IP to a router, the router gets its global IP from different ISP with a limited pool of IPs, so the ISPs ...
1
vote
2answers
5k views

How to find MAC or IP address of a device connected to the same Ethernet bridge?

I have the following topology: DeviceX ------ | DeviceX bridge with two Ethernet cards (created with bridge-utils) ---------------- router | ...
1
vote
1answer
103 views

ifconfig made my server unreachable

I just got a second IP address for my Debian Squeeze root. I tried to add the address to my network but somehow I messed up. The command I executed: ifconfig eth0 [new ip address] mask 255.255.255....
5
votes
2answers
3k views

Output only the IP addresses of the online machines with nmap

I know how to use nmap to find the list of hosts that are currently online. What I would like to do is get a list of just their IP addresses, now it displays extra information such as Nmap scan ...
1
vote
3answers
104 views

Can a Linux system have two IP's Simultaneously?

Recently I installed apache2 on Raspbian and after end of installation I entered the following cmd and got two IP's. $ hostname -I 192.168.1.17 192.168.1.24 Of this, I have been using the IP ...
3
votes
0answers
113 views

delay in IP route deletion

(Apologies if this is the wrong StackExchange for this question, but there does seem to be some confusion regarding appropriate targeting of IP networking questions) I am very much a network newbie, ...
3
votes
1answer
474 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 00:00:00:...
1
vote
0answers
51 views

How to make sure to get the Main/External IP without regard to network device type/name

Hello, I need to make sure I have the external or at least the main IP address for a given machine, regardless to the device type/name. I quickly wrote that tiny script for that purpose, but I need to ...
1
vote
1answer
125 views

How can I have a bridge that uses DHCP?

I have set up a linux box (centos 7) to use for virtualizing some servers. I have set up a bridge, but I need to do it with DHCP, but it doesn't seem to like it. The reason I need DHCP is because ...
3
votes
1answer
192 views

What's the shortest way to find my WAN IP address at the command line? [duplicate]

What's the shortest command I could use to find out my WAN IP?
0
votes
1answer
352 views

Why can I connect to the IP of a network interface (on a server with multiple network interfaces) when the network cable is removed?

I have a Server with multiple (four) network interfaces running Arch Linux when I encountered something strange that I cannot explain. I have two interfaces configured to the the ip addresses 192.168....
1
vote
1answer
136 views

Connect to offline network on second interface

I have an offline router I'm using to connect a remote wireless device. The router cannot be configured as an access point, or I would just use it to extend the range of my existing WLAN and use the ...
2
votes
1answer
422 views

Is Traffic control inside namespace on ports created by OpenvSwitch supported?

I am trying to limit the bandwidth of an interface inside a namespace using tc without much success. Seems it's not supported according to https://lists.linux-foundation.org/pipermail/containers/2009-...
2
votes
0answers
1k views

ping localhost sometimes fails with sendmsg: Operation not permitted

I have a problem with network adapter (i think) , look I trying to ping my self and got a error sometimes, how this can be ? First time in my life i see this. # ping 127.0.0.1 PING 127.0.0.1 (127.0.0....
-1
votes
2answers
623 views

How to find public ip for a freebsd system [duplicate]

Can someone tell me a command that will find my external ip for a freebsd 10 system.
1
vote
1answer
3k views

Trouble switching from DHCP to a static IP on Kali Linux

When I installed Kali Linux 64bit, I forgot to set up a static IP address, and now DHCP determines my address with my router. I have already modified /etc/hosts and /etc/network/interfaces to declare ...
0
votes
2answers
408 views

IP routing to domain

I have a remote device that sends data to an IP address through a specific port. The problem I want to solve is that I need it sends data to a domain, but device only allow set IP addresses. I want ...
3
votes
1answer
264 views

disable dhcp in initramfs

In Debian, how can I tell initramfs not to request an IP address via DHCP? I'm using initramfs-tools. I'd be okay with assigning a static IP address for the initramfs, but I can't find how to set ...
1
vote
0answers
202 views

Float MAC address in Heartbeat format

It's been about a month where I've been working with "High Availability" on Elastix based on DRBD and Heartbeat. As you maybe be familiar with it, there is a file in Heartbeat called haresources that'...
1
vote
0answers
165 views

Add ipv6 route so packets go to eth0

I have 2 VM Ubuntu 14.04 in VirtualBox. They are connected in internal network. One Ubuntu is sending multicast data (via VLC) and one is receiving. I added this in both VM's so it works via IPV4 ip ...
1
vote
2answers
667 views

Fake IP addresses generator

I have an application running on a server that adds a new iptable rule blocking every IP address trying to connect via SSH with a wrong password. Now, I'd like to perform a stress test where many (...
1
vote
2answers
302 views

ifconfig command showing internal ip address

I'm using centOS 6.3 on virtualbox as guest OS on Win 7 host. My problem is when I use ifconfig command in terminal, I'm being thrown internal IP address(10.x.x.x). However, when I googled "my IP ...
0
votes
2answers
176 views

Two virtual machine instance with same network on same host

Is this possible to have two (or more) instances of a virtual machine on a host with the same IP address (like 192.168.0.X)? What are the possible ways of implementing this? I need the two virtual ...
0
votes
1answer
112 views

Adding routes for configured virtual IP addresses of different segments

I have configured virtual IP addresses in different segments as below in RHEL box. eth0 - 192.X.X.208/27 eth0:1 - 192.X.X.219/27 eth0:2 - 10.72.X.19/24 eth0:3- 10.72.X.20/24 The problem here is as ...
3
votes
2answers
198 views

Show GEO IP information in Firefox when using tor

I've configured Firefox to use TOR (SOCKS proxy via localhost). Everything works great, but I would like to see at any time which IP in which country I'm using. is there a Firefox Addon, which ...
0
votes
1answer
60 views

Understanding NAT concepts

I began learning networking on Linux, and I am looking for a way to associate a particular IP to a particular MAC address (i.e. a way to edit the NAT table?). Actually I am trying to assign some IPs ...
0
votes
0answers
112 views

Accessing CentOS7 server from public

recently I switched to CentOS 7 OS and set up basic webserver with Apache. I had no problems configuring SSH, FTP and LAN access to the webpage. But accessing from other IP's won't work. I'm 99% sure ...
2
votes
4answers
887 views

How to display the IP address of the default Interface with Internet connection?

I need to create a script that outputs the internal IP address, that is configured as the default Interface.
0
votes
1answer
2k views

How to forward IP traffic between wlan0 and eth0 without killing network performance on the forwarding machine

I have a laptop running Debian 7 that connects to my building's Wifi. I want so share this network connection via the laptop's Ethernet port. I have setup a script below to do this based on some ...
-1
votes
2answers
245 views

If I send SYN / ACK with one IP and other packets with another, what happens?

I'm learning about UNIX and network programming. I'm not yet sure how to implement this. But I'm wondering: If I forge IP packets of a TCP connection to a server, so that the SYN / ACK packets use ...
4
votes
1answer
2k views

kernel martian source to and from same IP

We are intermittently seeing kernel: martian source log entries for eth0 on a couple of our servers. The interesting thing is that they are to and from the same IP. For instance: Nov 4 02:20:27 ...
1
vote
1answer
349 views

Relay server for generic TCP traffic?

Here's my situation: I have a computer (Mac) on a school network that I want to port forward TCP 5222 to for ejabberd, but of course I can't. I have a server at home (Mac with FreeBSD VM) that I can ...
2
votes
0answers
198 views

Network connectivity trouble to non-routing multi-homed hosts?

I have two networks: A and B (172.16.2.0/24 and 172.17.2.0/24). A is Ethernet, B is WiFi. An OpenWRT router connects A and B, and most traffic gets passed OK. Default route on router leads to a ...
1
vote
0answers
141 views

Egress packets do not use non-default routing table

I made a custom routing table named test: # ip route show table test default via 10.10.10.126 dev eth0 # As seen above, it contains only a single route. As a next step, I made a rule where traffic ...
2
votes
1answer
314 views

Bring network interface down if physical connectivity is lost

I have a headless Debian server with two network cards: 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000 link/ether 01:02:1d:54:7c:01 brd ...
-4
votes
2answers
6k views

Hiding Your IP on Linux [closed]

I've always been a Linux fan but I find it so surprising that unlike Windows, it doesn't have software like Real Hide My IP which is a software that allows you to select a country, change your IP and ...
0
votes
1answer
2k views

Getting all IPs of devices connected to the same router

I have several linux devices connected to the same router (of which I am not a administrator). How can I find out the ip addresses of all other devices by executing some commands in one of them?