Network address translation (NAT) is an network technique that allows that a public IP can be shared by many private hosts(machines).
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3answers
40 views
Making Localhost as worldwide server
I am using Ubuntu 12.04 with KDE desktop.
I have installed apache2 on my pc. I want set my localhost as remote accessible server. What I must to do? What is the NAT or Ubuntu servers settings?
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1answer
41 views
redirect traffic from 2 Ubuntu external NICs to specific internal hosts
I am having problems redirecting incoming traffic to 2 external facing interfaces on my Ubuntu 12.10 server to 2 separate internal hosts. I am able to redirect incoming traffic on my eth0 just fine to ...
2
votes
1answer
131 views
Unable to connect to my remote Ubuntu system using SSH
I want to connect to my remote PC running on Ubuntu 12.10 using SSH. But when I try ssh my_username@my_current_ip, I get this error:
ssh: connect to host 117...** port 22: Connection timed out
I ...
42
votes
8answers
2k views
What are the risks of NOT using a firewall (home computer)?
Since a password is required to be a superuser (to install and modify programs), what are the risks to not use a firewall under Ubuntu ? More particularly if I am using a NAT router ?
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0answers
31 views
How to run openmpi on virtualbox with 3 PCs through SSH?
I have 3 PCs with Vista, running Ubuntu through Virtualbox on them. I have installed openmpi and ssh on them, they are connected via ethernet. The IP addresses are all 10.0.2.15. And I can ping with ...
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1answer
99 views
Two guest in one NAT range (virtualbox)
I have two VMs(Ubuntu) in virtualbox and I wanna assign the first one 10.0.3.15 and the other one 10.0.3.14. But when I set network type to NAT the network adresses are different, 10.0.3.15 and ...
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1answer
292 views
forward port 80 for multiple IP addresses on the same Ubuntu server
I am using an Ubuntu 12.10 server as a router/NAT for an internal network to the internet. I have also configured the server to forward port 80 to a server sitting on my internal network. This all ...
2
votes
0answers
114 views
Ubuntu router breaking internet radio streams
I have Ubuntu 12.04 up and running fine as a DHCP router with great throughput to my connected devices. two single nic's (one onboard and one PCI-e, both with Realtek 8111E chips) are used as WAN and ...
6
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2answers
3k views
How to let a VirtualBox guest (running Windows) access the Internet?
I have a VirtualBox virtual machine. The host machine runs Ubuntu. The guest (virtual) machine runs Windows XP.
I googled this problem, and people claim that they fixed it by changing adapter type to ...
1
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1answer
227 views
how to access samba shares via nat?
I have setup a virtual machine in Virtual Box and installed a Samba Server. I changed the guest operating system's NIC from Bridged to NAT for a reason that I can't remember. I then added a additional ...
2
votes
2answers
2k views
vitualbox NAT stopped working after Ubuntu upgrade to 12.10
After upgrading to 12.10 from 12.04 none of my virtualbox virtual machines can use NAT to access the network. I have tried vboxmanage modifyvm --natdnsproxy1 on and/or --natdnshostresolver1 on, but ...
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1answer
117 views
How can I 'ssh' to an ubuntu server running on VirutalBox
I have installed Ubuntu Server on a virtual machine in VirtualBox which runs on Windows 7.
How can I connect through ssh to that virtual machine?
I go and type 'ifconfig', and i get this address ...
1
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1answer
232 views
ufw configuration nat ppp0
please some tips how i can allow this request in ufw:
[UFW BLOCK] IN=ppp0 OUT=eth0 MAC= SRC=10.11.22.2 DST=8.8.4.4 LEN=71 TOS=0x00 PREC=0x00 TTL=127 ID=52 PROTO=UDP SPT=59405 DPT=53 LEN=51
i tried ...
20
votes
4answers
3k views
Virtualbox DNS stopped working on upgrade to 12.10
I have a Debian image setup on Virtualbox that uses the default NAT to access the internet. It was working fine before I upgraded to 12.10. After I upgraded the DNS lookups no longer work. I still can ...
3
votes
1answer
1k views
how to connect to a remote desktop behind a router?
Here's my setup: I have a laptop that I roam around everywhere with, and I have a desktop computer at home that is connected to the web using a router with NAT.
My objective here is to create an SSH ...
0
votes
1answer
529 views
Ubuntu Server 12.04, NAT, Router, DNS. It just doesnt work
I recently inherited some server hardware from work and decided that it could be my main router at home
(among other things). Ubuntu 12.04 server installation harware wise goes well and everything is ...
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1answer
219 views
How to make sysctl network bridge settings persist after a reboot?
I am setting up a notebook for software demo purpose. The machine has 8GB RAM, a Core i7 Intel CPU, a 128GB SSD, and runs Ubuntu 12.04 LTS 64bit. The notebook is used as a KVM host and runs a few KVM ...
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2answers
913 views
NATTING in Ubuntu Server
My Server has two NIC, One is connected to the Internet Service provider with dhcp ip (dynamically change) given by ISP and other NIC is connected with local Switch with 192.168.1.1 IP. Now I want to ...
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2answers
732 views
Remote access from an Ubuntu desktop on internal LAN over internet to Ubuntu machine on another LAN
This question is prompted by another question here. Now I use teamviewer to connect to a Ubuntu desktop in a customer's LAN from my LAN. I get a password and access ID from him and connect, then use ...
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1answer
547 views
Problem with Connection sharing with 3G modem [closed]
I have a problem that's driving me insane.
I have a Thinkpad with 12.04 (hereafter, t-rex) and an iBook with OS X 10.4.11, freshly installed (hereafter, persephone).
I'm trying to share t-rex's ...
1
vote
1answer
626 views
IPv4 Address Sharing Issue? Trying to map IPv4 address from host OS to BT5 VM [closed]
I'm having a general networking issue in regards to my Backtrack 5 (x64) KDE VM in VirtualBox. The VM appears to be on a separate subnet, but for my purposes, I'd like to include the VM in the private ...
1
vote
1answer
446 views
Log destination IP with iptables
I want to log destination IP addresses in my Ubuntu router. I have two network cards
eth0 - 10.0.101.254
eth1 - 10.0.101.253
10.0.101.254 is the GW for all hosts on my network.
The router ...
3
votes
1answer
420 views
How can I solve an Xbox 360 'NAT Moderate' issue if I don't have access to the router?
After finally managing to get my Xbox 360 to connect to live, I've run into the "NAT moderate" issue.
First of all here's my setup...
wireless broadband >(usb)> laptop ubuntu 11.10 >(ethernet)> ...
2
votes
1answer
268 views
Is it possible to setup a DHCP server only for local virtual machines?
I have a quick question. I have a bunch of virtual machines (VMWare Workstation) running on an Ubuntu server and have found that VMWare NAT (DHCP) service is unreliable and slow. I have to use NAT ...
3
votes
1answer
5k views
How to share internet access between Ubuntu and Windows guests OS in VirtualBox?
Using VirtualBox.
There's two Virtual Machines, Ubuntu 10.04 and Windows 7.
On Ubuntu:
There's two ethernet interfaces.
Bridge interface (eth0) who can access the internet. ping www.google.com ...
6
votes
2answers
466 views
How to switch between network interfaces from console?
I've installed Debian in my VirtualBox (my host OS is Ubuntu). And there I configured two network interfaces: eth0 as NAT, and eth1 as Bridge.
NAT I need to have access to the internet in virtual OS, ...
0
votes
0answers
889 views
linux + iptables + nat + port forwarding [closed]
I know this is not the first topic on the internet about NAT and port forwarding, and I did really googled for it. Did everything according to the manuals, but still failed.
So, my task is to create ...
3
votes
1answer
1k views
sharing internet between network interfaces
I have a laptop with lubuntu 11 with two network interfaces, wireless and wired. Wireless interface connects to the router with DHCP and provides access to the internet. The wired interface has a ...
