Networking :: Get Two Ip Addresses To Communicate With Each Other?

Nov 19, 2010

How can I get two ip addresses to communicate with each other which are not in the same 255 range?


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Networking :: Route Two Pc's - Communicate To Each Others

Dec 3, 2010

I'm using Fedora 9 and has finished the DHCP for my eth2 and static on eth0. I would like to add a route so that the 192.168.22.x eth0 and 192.168.26.x eth2 can communicate to each others,.

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Networking :: Getting Two Linux Servers To Communicate

Dec 18, 2010

I am testing with Suse Linux Enterprise Server 10 in a VMWare environment. I've installed two SLES10 servers, named sles1 and sles2. I can't get the two servers to communicate, even a simple ping won't work. The "Network Adapter" in VMWare is set to "bridged", a setting which has worked fine when installing WinXP in VMWare and connecting to the Internet.Even if I ping sles1 from sles1 (= "pinging myself"), I get the same error message.Only if I ping localhost, I get a proper ping result.What did I do wrong? Did I forget to configure something?

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Fedora Networking :: Can't Communicate Fully With Other Computers ?

Oct 20, 2009

I downloaded and installed a new copy of Fedora 11 last week onto a new computer (hereafter "proximate"). I also have a remote computer without a monitor running an outdated version of Red Hat Linux (hereafter "remote"). To manage the processes on remote graphically, I ssh from proximate into remote; this connection succeeds without incident in transmitting text (including commands) between the two computers; however, the command "gnome-session" returns: (gnome-session:15789): Gtk-WARNING **: cannot open display:

(The numbers apparently represent the process identifier and vary from instance to instance.) A similar warning (and no accompanying graphics) occurs whenever I attempt to start any graphical user interface from remote via ssh from proximate. The issue almost certainly lies with proximate; remote successfully communicated graphics to the ancient box that proximate replaces.

Interestingly, I cannot communicate via ssh from remote to proximate (within a secure shell from proximate to remote). If I execute /usr/sbin/sshd on proximate as root, then I can login, but even then I cannot execute any commands.

Consider the following output:

If I execute ssh -vvv proximate from remote to proximate, then I get a lengthy output that ultimately ends with "debug1: Exit status 254."

What must I do to communicate both text and graphics among my computers?

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Ubuntu Networking :: Unable To Communicate Two Computer With Each Other?

Jul 18, 2010

I have two computers...Ubuntu server and Windows XP client. Both are connected to the internet using Ethernet. I have them connected directly using 1394 to increase speed of large transfers. The internet network and 1394 have different IP address scemes. Internet 192.168... 1394 10.0.0...

I am having problems getting the two computers to communicate with each other. I can ping the server's ip address and and it loops back. Same with the XP's IP address. I can't ping each other.

ifconfig shows my eth0 and eth1 connections are up. The eth1 Link Encap says UNSPEC.(Don't know if that means anything.)

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Ubuntu Networking :: ASUS USB-N13 Fails To Communicate?

Dec 5, 2010

Chili555 where are you?

I am running Ubuntu Release 10.04 (lucid), Kernel Linux 2.6.32-26-generic-pae, GNOME 2.30.2.

I have installed the ASUS USB-N13 according to your advice in previous posts, specifically, in your advice to 828688 Ben.

The dongle seems to be operating as it should. The LED does its flashing at what appears to be the correct time. Wicd also looks correct. Networks are found with good signals shown. Everything looks correct. But when I attempt to connect, "validating authentication" runs for quite some time, and eventually results in a dialogue window stating the communication failed. The required WEP password is entered in the RT2870STA.dat file, and again in the wicd window.

I have entered as much detail in the RT2870STA.dat file as I dare, and believe it to be correct.

ndiswrapper is not installed. Network Manager is uninstalled. Only wicd remains.

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Networking :: Error Message - Can't Communicate With Ypbind

Apr 6, 2010

I am trying to set up an NIS client on a Fedora Core 12 64-bit system. The ypbind daemon is running via the /etc/init.d/ypbind script. However, whenever I run the ypwhich command, the following error message appears on-screen:


The client has been configured so the domain is set, and the client will broadcast for the first available nis server. The client is on a subnet where there is one nis slave server, so it should bind to that server. One thought that came to mind was the fact the client in question is 64-bit, while the nis slave is 32-bit. Could that cause this problem?

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Networking :: Getting Two Servers To Communicate (Ping) In VMWare Environment

Dec 18, 2010

I am testing with Suse Linux Enterprise Server 10 in a VMWare environment. I've installed two SLES10 servers, named sles1 and sles2. I can't get the two servers to communicate, even a simple ping won't work. The "Network Adapter" in VMWare is set to "bridged", a setting which has worked fine when installing WinXP in VMWare and connecting to the Internet. I have configured the Network Settings as follows:

-Statically assigned IP Address
-Subnet: (/24)
-Hostname: sles1

Hostname/DNS tab:
-Hostname: sles1
-Domain Name: local
-Name server: blank

Routing tab:
-Default Gateway: (= my router connected to the Internet)
SLES2: same as sles1, with IP and Hostname sles2

With these network settings, the two servers seem totally unable to communciate.
-When I ping sles2 from sles1, I always get the error message: connect: Network is unreachable
-Whatever way I ping, either ping sles2, ping sles2.local, ping, whatever, the error message is always the same.
-Even if I ping sles1 from sles1 (= "pinging myself"), I get the same error message.
-Only if I ping localhost, I get a proper ping result.

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Ubuntu Networking :: Member Of All Groups Communicate Simultaneously With ALL Computers?

Aug 27, 2010

given my computer is in a network consisting of multiple subnetworks, i.e. there are groups of computers: {,, etc.}, {,, etc.},..., {,, etc.}. My computer is So I can communicate with, etc. To communicate with other people I have manually switch to the proper subnetwork and take a new ip, e.g. My question is: Is there any way to be member of all groups and communicate simultaneously with ALL computers? And if not, is there a way to find out (without manually changing the ip address) if computers of other subnetworks are online, so one does not have to change the ip and then look for other computers in the new subnetwork?

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Ubuntu Networking :: Unable To Communicate Anymore - Software Centre Does Not Work

Jul 14, 2010

One problem has led to another.. I had notebook version 9.10 and it worked OK. I Downloaded 10.04 onto USB and all seemed fine. After upgrade - disaster. I have as Asus Eee PC901.

1. I am in Italy and bought a TIM USB mobile broadband modem - Ubuntu can see the device but nothing happens except a bizzare message with no information at all 'Unable to Open Archive'. I have no idea what that meant nor what I should do to resolve whatever it is, so I went back to my older USB modem which worked under 9.10 - Now even that device does nothing.

2. as a result, Ubuntu software centre does not work, Synaptic Package manager is the same; also update manager.

3. Limited communications are available via the university wireless network. That network requires me to work through their own proxy;port address (with username and password) which I have set up using proxy manager including the username and password. This allows me to carry out web surfing and point to point downloads.

4. Firefox works fine, and it obeys the requirements for registering with the proxy. Thunderbird, evolution, Synaptic, Update manager, Software centre etc all fail because they failed to authenticate with the proxy. They all have been set up to use system proxy. (Also tried direct proxy address;port in each package but no go)

5. The ultimate frustration has come from the direct download of Skype (.deb). Double click and it starts to install then crashes because of numerous dependencies (things like libqtgui4).

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Fedora Networking :: VM's To Be Able To Ping Each Other And Have Own "network" To Operate / Communicate

Jul 2, 2011

I have been trying to set up a network bridge for the 2 virtual machines installed on my Fedora 14 host PC. I want the VM's to be able to ping each other and have their own "network" in which they can operate/communicate. What is the simplest way to accomplish this? Most of what I have read revolves around turning off NetworkManager, and the following config files:


Once these files are configured and the network is restarted, the bridge should work. Is this true? I have been encountering problems with this process, specifically when I try to link a VM to a bridge.

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Ubuntu Networking :: Can't Communicate Data With "nc 3333" In Another Terminal?

Jul 14, 2011

My necat (nc) doesn't listen! It means when I write "nc -l 3333", I can't communicate data with "nc 3333" in another terminal! Also after writing "nc -l 333", I don't see port 333 between the ports which are listening, by "netstat -ln | grep 3333".

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Networking :: How To Log Ip Addresses

Oct 29, 2010

Does anyone know a good program to log ip addresses when visited or connecting to your machine? Something like tcpdump but for ip addresses, I forgot what its called.

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Networking :: Two IP Addresses Using One NIC?

Feb 10, 2010

Is it possible to configure two IP addresses using one NIC? I'm implementing a VPN server on network, ultimately to be accessed over the Internet and through an ADSL router with port-forwarding to the server. Right now I'd like to test it on the LAN, but with the VPN client and server both on the network, that test would not be be valid.

If I had a spare NIC I could put the server on both the network and, say, a network, configure the client on and test. Not having a spare NIC, I'm wondering if it is possible to configure the server with two IP addressese NIC.Virtualising hosts are able to do something similar when running guests with NICs in bridged mode. Log files show they switch eth0 into promiscuouse.In case it matters the server OS is Slackware 13.0.

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Networking :: 1 Net Card With 2 IP Addresses?

Mar 11, 2010

Can I set 2 addresses for the *1* Ethernet card that I have on my motherboard? How would this scenario work?

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Networking :: Differences Between IP Addresses?

Apr 24, 2011

I've used two internet services to show me my IP address, and I get different results:1. : ***.**.109.***2. : ***.**.111.***All the * numbers are same, except 109 and 111. (or link me to explanation) of which one's which?

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Networking :: More Than One MAC Addresses On Single NIC?

Sep 25, 2010

My machine has ONE ethernet card and is on a LAN.IP address is assigned to hosts using DHCP.I can have more than one MAC address on LAN by running Virtual Machine and setting network to bridged. This way, my virtual machine simply acts like there is one more machine in the network.Running VMWare for this job is a a bit heavy on resources. Is there a way so that I can I can have 2 or more ip addresses with different MAC address on the same machine without having to run VirtualBox.

By googling, I think its related to bridging and tap. And, I am sure thatts NOT IP-ALIASING because in ip-aliasing both the ip addresses have the same MAC address.Basically, I want my system to have interfaces like:-eth0 - which was originally presentlo- thats always present :|newint0 - New interface with new MAC address and IP addresses which can access my LAN directly. Its like if I bind, let us suppose curl to this interface, its like a different connection

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Fedora Networking :: How To Assign Two IP Addresses To One NIC

Jul 29, 2009

I have connected my computer to network. Computers in network have dynamic ip address which is assigned by ADSL modem's DHCP. Besides this I want to have static IP address for same NIC. So is it possible to have both static and dynamic IP address for single NIC? If so how can I assign it using command and also in GUI?

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Ubuntu Networking :: Cannot Correct The Web Addresses

Feb 24, 2010

I have a Dell Inspiron 1545 with Ubuntu Karmic that was working like a charm until last week.When I'm using my college's wireless I can browse just fine, but when I'm in my home's network the web addresses cannot be resolved.I was suspecting of DNS error, but it's the same DNS address in all the other computers, and the whole network is working just fine.The thing is that if I use the IPs, for instance for Google, it works fine, both pinging and browsing. So the problem is in resolving the addresses...

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Ubuntu Networking :: Getting 2 Different MAC Addresses For Same Adapter

Jan 12, 2011

I am running a dual boot PC, Ubuntu 10.10 & Win7. I do sticky static IPs on my local network, but it doesn't work cause the Ethernet adapter gets a different MAC address in Windows 7 (EF:9F:E9:F7:F7:F7) than it shows for Ubuntu 10.10 (00:13:74:00:5C:3. I am not sure if this is a Windows problem or something up with Ubuntu. The card is an on-board Atheros L2 fast Ethernet adapter. I have tried updating the drivers in Windows & nothing is working.

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Networking :: Accepting Connections To IP And Mac Addresses?

Nov 30, 2010

I would like to know if a rule has been applied to the file to accept direct connections on port 22 through an IP address, can I also add a mac address/addresses to the rules such that if I am not on the network with the accepting IP address, that my MAC address will still get me in?

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Networking :: Apache Allow Fixed Ip Addresses

May 23, 2011

I would like have a password for accessing my web site which works fine. I also want for the specific site to allow access only for a specific range of ips. Right now the following config should forbid my access, as my ip is different from 200.200.200.*

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Networking :: How To Determine Ip-addresses Of ISP's DNS Name Servers?

Dec 7, 2008

I am looking for a command which, when typed from the command line, returns the ip-addresses of the DNS nameservers that my ISP is using.I think is should be technically possible to write a program that does this, because linux installers set up /etc/resolv.conf correctly (as does knoppix). But I've been unable to find a command that does it. Is there one, and if so, what is it called?

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Networking :: How To Express Range Of Ip Addresses

Sep 22, 2010

I do not currently fully understand relationship between binary numbers and ip addresses and subnet addresses; nor am I asking for an explanation here at LQ, when there are plenty at wikipedia and other places...

Even after reading the wikipedia article on it, I still don't grasp it completely, so I was hoping that someone who grasps it in its entirety could answer a simple question.

How can I express the range of ip addresses from - ?

I was trying to make a rule for iptables that only did nat on that specific range of ips, and when i tried used the "-s" flag followed by it always changes to in the actual rule that is created and displayed by iptables -t nat -L.

I already have many hosts defined on my network, and rather than going through each one and changing its ipaddress to 172.0.0.#, I was hoping to learn a way to represent them in the iptables rule.

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Networking :: Get A List Of IP Addresses Currently On The Network?

Dec 13, 2008

I am using DHCP on my home network. There could be as many as 5 computers logged in at any given time. Their IP addresses change depending on the sequence they log in.I want to be able to connect to them from any of them (some wired, some wireless) and share files by issuing a mount command for the appropriate shared drive.My question is how to get the IP of each computer when I only know the names of the computers. Pinging the computer name succeeds, but it does not give the IP.In other words I am looking for a Linux command that will come back with a list of IP's with their corresponding computer names so I can issue the right mount command. I would like to issue this command from a Linux terminal, but would also be happy to issue it from a Windows XP station.

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Networking :: Ifconfig Shows Two Ip Addresses?

Feb 5, 2011

I'm on Fedora core 14 linux. and I'm online with the HSPDA modem. My modem is /dev/ttyUSB0 and when it's dialed it creates the interface /dev/ppp0 , My question is when I hit ifcofig it shows two IP addresses in the ppp0 interface.


[nature@localhost ~]$ ifconfig
eth0 Link encap:Ethernet HWaddr 20:6A:8A:12:CF:53
RX packets:0 errors:0 dropped:0 overruns:0 frame:0


when I get the routing table, the gateway is setten to the and when I look my Ip address global I found it's

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Networking :: IP Addresses Cannot Be Located Geographically - Where To Get One

Mar 20, 2011

I noticed when looking at visitor stats for a web page, most users IP address resolves to a city. But for some visitors, the city is "location not available". How can someone get an IP address that's off the map? Where I'm seeing this is in the stats for an link.

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Networking :: NAT With Multiple Internet Addresses

Mar 8, 2010

My Linux gateway has multiple address to internet:
eth0 =
eth0:0 =
eth0:1 =
and it's own gateway which is (probably not relevant) and I also have which is not internet, but local:
eth0:2 = netmask

They all work fine and tested. Now I am sharing the internet through eth0 ( to and that's working fine. The script I use to do that is here...

echo 1 >/proc/sys/net/ipv4/ip_forward
echo 1 >/proc/sys/net/ipv4/ip_dynaddr
iptables -t nat --flush
iptables -A FORWARD -i eth0 -d -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -s -o eth0 -j ACCEPT
iptables -A FORWARD -j LOG
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Now all I want to change in the script is to share it through (eth0:1) instead of what is already sharing through (eth0). I am sure this is easy but can't work it out and iptables doesn't accept 'aliases'. How I can do this by modifying this script?

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Networking :: Using NMAP On A Range Of IP Addresses

Dec 21, 2010

Hopefully Ody has found a result in the 5 years since he posted this question, for anyone else looking for an answer
NMAP scan for a range of individual IP's can be done using the '-' for example:
(this is accurate as of 2010, actual results have been altered to match OP's address range)

$nmap -sP

Starting Nmap 5.00 ( ) at 2010-12-22 09:55
Interesting ports on
Not shown: 999 closed ports
80/tcp open http

Interesting ports on
Not shown: 999 closed ports
80/tcp open http

Interesting ports on
Not shown: 999 closed ports
80/tcp open http

Nmap done: 14 IP addresses (3 hosts up) scanned in 8.08 seconds

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CentOS 5 Networking :: Add Further IP Addresses For Server

Mar 16, 2010

I'd like to add further IP addresses for my server but I don't get it. My steps :


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