The ip tag has no wiki summary.
6
votes
5answers
377 views
Assigning IP address to environment variable
How can I assign the IP address of eth0 to an environment variable, say $ip, as easily as possible?
Update: Distro is Ubuntu Server 12.04 LTS.
7
votes
1answer
715 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 ...
1
vote
2answers
81 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
votes
1answer
273 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 ...
4
votes
2answers
636 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 ...
7
votes
2answers
501 views
How can I disable TCP/IP for an Ethernet adapter?
I have CentOS 6.3 running in a (virtual) machine with two Ethernet adapters. I have eth0 connected to a TCP/IP LAN and eth1 connected to a DSL modem. The system is intended as a dedicated ...
2
votes
1answer
563 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 ...
3
votes
1answer
200 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: ...
4
votes
1answer
844 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
votes
1answer
607 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
...
1
vote
2answers
3k views
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)
...
3
votes
2answers
145 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 ...
1
vote
2answers
450 views
SSH to a remote computer having only the public IP
I looked over some questions asked here relating to this issue but couldn't find a solution.
I'm trying to connect to a computer behind a router via SSH knowing only the public IP address (of the ...
1
vote
1answer
206 views
Changing host file in Ubuntu
I tried to change /etc/hosts to change a local DNS entry, so I can map any website name to any IP, but it isn't working. How can I debug it?
1
vote
1answer
439 views
Scan one or all ports, on UDP or all protocols, to see if I'm getting, what I suppose to get
I have a GPS localizer (TK102). I've set it up to send responses over GPRS to particular IP and over particular port. I was told that, it uses UDP.
It seems that something is being sent (paid ...
1
vote
1answer
201 views
How to use traceroute command in unix
how to determine if the server is slow or not with traceroute unix command .
Here is the traceroute Out put of a host IP .
traceroute 188.165.247.43
traceroute to 188.165.247.43 (188.165.247.43), ...
6
votes
1answer
300 views
Load Balancer Solution with linux
I need a suggestion to realize a proper solution to this problem:
As you can see in the image above, I have 2 application servers that need to talk with and external third party provider over the ...
1
vote
4answers
2k views
IP of localhost
How does a Linux instance determine its IP address?
That is, not the 127.0.0.1.
Is this stored in file or does ifconfig somehow calculate it at every invocation?
I managed to solve it just to show ...
2
votes
0answers
180 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 ...
1
vote
2answers
4k views
Changing the IP Address in Solaris 11
I am trying to change the IP address in Solaris, but am failing to do so.
The IP address needs to be a fixed number, like 10.0.11.10
I have tried changing the IP address in /etc/hosts which I ...
3
votes
1answer
223 views
Route incoming network requests for a given port to different applications
I have an application that listens for connections on a port, but I occasionally take it down for updates and the like. I'd like a way to configure the system such that if that program is running, ...
15
votes
1answer
2k views
Why doesn't Linux use the IANA Ephemeral port range?
According to Wikipedia
The Internet Assigned Numbers Authority (IANA) suggests the range 49152 to 65535 for dynamic or private ports. Many Linux kernels use the port range 32768 to 61000.
Even ...
1
vote
3answers
268 views
Books/Resources which explain TCP/IP kernel implementation [closed]
I only know about:
1) Internetworking with TCP/IP: Vol.II, Design, Implementation, and Internals
2) TCP/IP Illustrated, Vol. 2: The Implementation
but these are quite dated. I am particularly ...
1
vote
1answer
102 views
Monitoring interface changes with udev, especially if a route is set
Is there a way to monitor interface up/downs, especially to check if a route is setup or removed, with udev?
4
votes
2answers
416 views
How to configure Linux to use DHCP or static IP depending on presence/absence of DHCP server?
I would like to configure a network interface to make use of DHCP if a DHCP server is present on the network during boot, but otherwise default to some default static IP address.
2
votes
3answers
382 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.
1
vote
1answer
603 views
Changing DD-WRT's default IP address
I have Buffalo WZR-HP-G300NH wireless router and I updated the firmware to DD-WRT (the newest build). The rest of my home network is in IP scope of 192.168.0.100-200 and this router has it's own. The ...
4
votes
1answer
293 views
Control source address for whois queries
is it possible to execute the command "whois" and choose the outgoing ip for the query?
I have mounted several IP's on my network interface "/etc/network/interfaces" for ssl porpuses, but would be ...
3
votes
6answers
410 views
Find my computer on a LAN network
Let's say that I have a computer plugged in to a local network using a dhcp connection, so it will get a different IP every time. Is there a way to find this computer (so the IP) from a different ...
-1
votes
1answer
123 views
need to my server's ip changes when it needs to connect port 'x' on ip 'y'
simple question: "need a way to proxify a port"
I have a linux server and have a proxy server on another machine.
My linux server needs connect to port 'x' on ip 'y'
Is it possible to create ...
2
votes
1answer
172 views
Constantly pinging a server
I am not sure if this is exactly the right place for this question, but there is no networking stack exchange.
I want to ping a server a bunch of times (eg.10,000+) to gather information on the ...
0
votes
1answer
51 views
Do IPTABLE rules apply to other devices on a network?
I have an embedded device that listens to a specific port to be programmed by vendor specific software. If I have a network that consists of a small linux computer and this industrial device would ...
3
votes
3answers
2k views
Find out network traffic per IP
We have one central server which functions as an internet gateway. This server is connected to the internet, and using iptables we forward traffic and share the internet connection among all computers ...
0
votes
2answers
137 views
dig returns different IP address when dropping the “www.” from domain name
I have performed a dig on my domain name used on my site and I seem to be getting different results when I drop the "www." from the lookup. I am concerned this is causing me issues within my ...
3
votes
2answers
203 views
Ethernet Sniffing Embeded Device
I recently dug out some prototyping equipment from the trash and I want out figure out what the heck it is. It has a port labelled 'Ethernet' and when I plug it into a router the lights flash like its ...
1
vote
2answers
355 views
Adding an ip to a routing table
Is there any way I can add an ip to an interface , but interface route gets created on a routing table other than 'main' routing table in linux?
For ex: If I add an IP 10.11.20.10/24 to eth0, it ...
3
votes
2answers
640 views
IP rule for IPv6
When I try to add an IP rule for IPv6 on my Linux system, it errors out:
$ ip -6 rule add fwmark 0xfab lookup 0xf
RTNETLINK answers: Address family not supported by protocol
I checked out the IP ...
3
votes
1answer
141 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 ...
0
votes
1answer
2k views
Centos 6.2 static IP: only getting IPV6 address and need IPV4
I installed a Centos 6.2 min install. I have edited /etc/sysconfig/network-scripts and I have ifcfg-eth0,eth1
I have tried to setup static IPs but I only get IPV6 address back on both adapters and ...
4
votes
3answers
693 views
How can I get the netmask from an IP address?
How do I get a netmask from the IP address? Is there a command to get it?
2
votes
1answer
340 views
Routing private network to internet via 2 gateways
I have the current set up for an embedded environment:
Embedded Target (192.168.0.200) -----> Virtual Machine (VMWare) (2 NIC's - 192.168.0.2 (Target Port) and 192.168.49.69 (NAT Port to host)) ...
1
vote
0answers
258 views
Usb tethering with linux and htc desire s other than rndis_host
I want to share the connection of my htc desire s with linux and I'm doing it but if it is possibile I'd like to avoid using the rndis_host module. The tethering can be configured as "windows" or "mac ...
3
votes
1answer
115 views
Labeling/Aliasing multiple network addresses
If my machine is connected to several networks and configured with multiple addresses (ipv4), is it wise to configure and use labels to identify them ?
By labels I mean the iproute2 ip command's ...
1
vote
1answer
122 views
IPv6 NDP timer problem
Need to change Fedora Linux's IPv6 stack for NDP DAD timer changes.
How to locate the Fedora's IPv6 and IPv4 stack in Fedora distribution dvd/site so that, we can recompile and generate new stack ?
1
vote
0answers
271 views
AIX multihomed multicast
On my AIX machine if I run netstat -ia I get:
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
en0 1500 link#2 1e.18.1.1e.78.2 385229 0 1091655 0 0
...
2
votes
0answers
107 views
How to fairly share bandwidth between IPs with tc?
I have a linux router (d-link 320-nru) with tc installed.
I have some users' computers to fairly share bandwidth between them.
Also there is such complication as inconstant uplink bandwidth.
How can ...
2
votes
1answer
84 views
Gentoo on VM setting IP Manually
I installed Gentoo on Virtualbox with the minimal image. This is the first time I am running gentoo. I need to do
ifconfig eth0 192.168.0.10
route add default gw 192.168.0.1
everytime it boots on ...
1
vote
2answers
456 views
squid (reverse proxy) configuration
I would like to configure squid in such way, so that only specific (public) ip (reverse proxy), could connect to the server, but I don't know how... can someone tell me how to do this?
4
votes
3answers
7k views
Why are my two virtual machines getting the same IP address?
I have two virtual machines both running on a Linux host (Fedora 16). I set both adapters as attached to NAT. When I boot them up they both have their default gateway set to 10.0.2.2. They also ...
2
votes
2answers
1k views
show gateway IP address when performing ifconfig command
Currently, when using the ifconfig command, the following IP addresses are shown:
own IP, broadcast and mask.
Is there a way to show the related gateway IP address as well (on the same screen with ...
