the IP protocol and IP addresses

learn more… | top users | synonyms

1
vote
0answers
36 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 ...
3
votes
2answers
576 views

Policy routing with load balanced ppp connections

This my setup using Debian 6.0. 6. It's role is a proxy server and a load balancer using eight 3G modems. Whenever a ppp connection dials it takes over the default gateway which is ok but it also ...
55
votes
16answers
41k views

How can I get my external IP address in bash?

I need to find my external IP address from a bash script. At the moment I use this function: myip () { lwp-request -o text checkip.dyndns.org | awk '{ print $NF }' } But it depends on ...
3
votes
1answer
26 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 ...
5
votes
1answer
155 views

bash_completion rule for resolving ip into hostnames

I am trying to create a bash_completion rule for my script rmpxe. This script takes <hostname> as its only argument. It then resolves this hostname into <ip_address> and removes the ...
3
votes
5answers
251 views

Why am I getting inconsistent IP values from icanhazip.com or curlmyip.com?

I wrote a bash script and appended to my crontab to query my IP address every minute, and if it is not the same with the previous query it sends me an e-mail to inform me for the IP address change. ...
0
votes
2answers
17 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 ...
5
votes
3answers
6k views

How can I restart a network interface?

How can I restart a network interface? I have a vm that doesn't update its IP address correctly when switching between home and work. The vm runs Ubuntu server and uses a bridged network adapter.
2
votes
2answers
397 views

How do I route a spare network interface through an SSH tunnel?

I just bought a Raspberry Pi and I am wanting to route an ad hoc wireless network interface fully through an SSH tunnel that was created using another wireless interface. I want to do this so that I ...
0
votes
1answer
611 views

ICMP gives host an impossible redirect

I am having trouble with forwarding on a system which hosts a few headless VirtualBox VMs. I have not changed anything but the configuration has stopped working. The VMs have IP addresses on their own ...
0
votes
1answer
554 views

SUSE Linux 12 - configuring IP alias

I want to setup an IP address alias on a network card. I created a file /etc/sysconfig/network/ifcfg-ens160 and its contents are: BOOTPROTO='static' STARTMODE='onboot' IPADDR='192.168.0.113' ...
1
vote
0answers
15 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 ...
1
vote
0answers
14 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
150 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 ...
3
votes
2answers
68 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
2answers
35 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 ...
1
vote
1answer
63 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
1answer
23 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 ...
2
votes
2answers
571 views

keep losing IP with dhcpcd

I have an Arch Linux install in a VirtualBox VM, and as I'm working all of a sudden, it will lose it's dynamic IP address. When this happens, if I check on the status of the dhcpcd service it says ...
1
vote
0answers
35 views

Where to find a basic tutorial/book on Linux networking? [closed]

I am not sure this question is eligible for this forum, so if not, please provide which forum is more suitable for this question. What I am looking for is a basic introduction in how networks work ...
2
votes
1answer
394 views

Is it possible for DHCP to assign different IP addresses to the same machine?

I have installed and configured a DHCP server on my CentOS 6.5. It works properly and assign IP addresses to the clients machines on my network, and as I noticed when a client reconnect the DHCP ...
0
votes
1answer
32 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
27 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 ...
1
vote
1answer
27 views

rkhunter reports /sbin/ip has changed

I am using rkhunter 1.4.2 on CentOS 6.5. A message, in /var/log/rkhunter.log is Warning: The file properties have changed: [09:40:35] File: /sbin/ip [09:40:35] Current size: 247396 ...
3
votes
3answers
12k views

How can I get the address of my local machine?

I'm on a macbook running Lion. In Terminal I'm connected to my schools server with ssh. I navigated to a folder on the server and have a file I want to copy to my local machine, but I don't know what ...
2
votes
4answers
88 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
113 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 ...
3
votes
3answers
701 views

Implementing load balancing on any Linux distro

I am thinking of implementing a load balancing solution for personal use. What I want to do, is to maximize data throughput over mobile phone Internet connections. Let me be clear: I have data plan ...
-1
votes
2answers
30 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 ...
3
votes
1answer
64 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
35 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
46 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 ...
2
votes
1answer
58 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 ...
0
votes
0answers
22 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 ...
-4
votes
2answers
101 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
70 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?
1
vote
0answers
26 views

NAT-T set up using 3 linux machines

I am trying to have a simple NAT-T setup using 3 linux machines. Linux1 Linux2(NATdevice) Linux3 (eth0) 192.168.1.51 <--->(eth1)192.168.1.80 & ...
2
votes
2answers
2k views

Static routes in route-eth0 ignored

Why might route-eth0 be ignored but route-eth1 not? Might be because eth0 is using DHCP and eth1 is statically-configured? I have some static routes configured in ...
6
votes
3answers
2k views

Difference between 'ifconfig' and 'ip' commands

I read some articles/tutorials on 'ifconfig' command, most of them included a common statement - "ifconfig is deprecated by ip command" and suggested to learn ip command. But none of them ...
44
votes
2answers
5k views

How does SSH connection survive a network restart?

From a Linux SSH shell, type /etc/init.d/network restart to restart the network service. I expect my SSH connection to die since the network service goes down. But it doesn't. Very cool. But how does ...
2
votes
0answers
87 views

forward virtual interface network in KVM guest to the physical interface in the host machine

I am trying to experiment with Linux IP routes. This is what I have so far. I have a host machine whose network details are as below. wlan0 inet addr:192.168.1.9 Bcast:192.168.1.255 ...
1
vote
4answers
400 views

How to find IP address of device connected on the same network as PC based on MAC id

A PC and embedded Linux device is connected on the same local network.(We don't have DHCP server access, IT admin has the access). We also don't have access to debug UART on the embedded Linux board. ...
7
votes
2answers
532 views

Identical MAC address on two different VM, yet I have internet connectivity

I have set up a network as such: Set up host-only networking on VirtualBox. The first adapter is configured with NAT, the second with host-only networking HOST: Windows GUEST: CentOS VM1, CentOS VM2 ...
-1
votes
1answer
323 views

Static IP for Wifi Centos 7

Can someone explain to me how to setup a static ip for wifi on CentOs 7? This the configuration file I have for the network using DHCP: ESSID="Network name" MODE=Managed KEY_MGMT="key type" ...
1
vote
0answers
23 views

Are there any loopholes in IP restricting sshd?

Say that i want to only allow username/password logins on my private network, but restrict all external sources on to key/cert login. I would do something like this: RSAAuthentication yes ...
0
votes
1answer
47 views

How to map IP by iptables ?

I create a network namespace In this namespace, I open a nginx So for now, I can visit web server by 172.17.0.2 What I want to do is mapping this IP to 127.0.0.1 Lets say if I visit 127.0.0.1, I ...
2
votes
2answers
2k views

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 ...
0
votes
1answer
65 views

IP access okay but ping doesn't work

I have a laptop connected to a Wi-Fi, and let's say I am testing the connection to a website ("randomwebsite.com", IP:123.123.123.123) Through a terminal I have tested ping: ...
3
votes
4answers
6k views

Make some virtual MAC address

I want to make some virtual MAC addresses for my network adapter or wireless adapter, so I can connect to network with more than one IP address from one computer or laptop. How can I do it? (I know ...
1
vote
1answer
58 views

ip forwarding to remotely connect to a socket listening to localhost only?

I must transfer data from PC1 to PC2 using a specific port, but the socket opened on PC2 only listens to local host. Is there a way to "trick" the socket into accepting the connection from PC1?