3
votes
1answer
590 views

Using Ubuntu 14.04 as router with iptables, clients can't go online. Probably DNS issue, iptables setting needed

CORRECTION 3: SOLVED! I needed to add the the official DNS server of my departement's VLAN as DNS to the clients. I've read through a large number of posts about iptables issues when using Linux as ...
0
votes
0answers
22 views

\0 for the USB-LAN Adapter device name for netfilter library

I have a network emulator which works on top of Linux's netfilter. It uses the user-space library to build a simple emulator, which gets traffic from the machine's LAN device (eth0), and forwards it ...
1
vote
2answers
74 views

Setting up NAT for internet access on a connected router

I'm setting up a NAT for a connected router to my laptop using the following command (IP forwarding is enabled): sudo iptables -t nat -A POSTROUTING -s 192.168.47.0/24 -o eth0 -j MASQUERADE So ...
1
vote
1answer
57 views

Hardcoded static IP assignment for eth1

I'm setting up a NAT, and need to assign a static IP to my eth1 interface. The problem is that once in a while, it resets, and I need to run the following command again: sudo ifconfig eth1 ...
1
vote
1answer
653 views

Dnat prerouting does not work on Ubuntu 14.04

I've got a Ubuntu 14.04 server used as firewall, router, dhcp, dns and proxy. Everything works properly from inside to the internet, but the forwarding from outside to the inside network doesn't work. ...
0
votes
0answers
150 views

vuze: 0 users — but was working fine before clean install!

Vuze gives an error that "0 users" are connected, and a firewall error. I don't think it's the network, because the same network was working fine just a few hours ago. Vuze was working perfectly up ...
0
votes
0answers
144 views

How to do NAT from server with USB 3G modem internet access?

Firstly, apologize me for confusing you guys with the tittle. I'm learning Ubuntu Server at my school (currently: configuring NAT, and DNS server). Sometime, I need to practice things which my master ...
0
votes
2answers
1k views

Open source stun turn server which can do hole punch is there similar packages?

Is there any open source stun/turn server which can do hole punch like numb for Ubuntu ? Numb is a STUN/TURN server. Description A STUN/TURN server is used for NAT traversal in VoIP. ...
0
votes
0answers
46 views

How to use network interface of another PC to connect to web

There is a server machine with two network interfaces: eth0 eth1 It can access the web through eth0 and eth1 is used for client machines to access the files on the server. How can I configure the ...
0
votes
0answers
210 views

Can't connect to web-server on local host behind NAT

I got Ubuntu as host. I'm running a web-server on 192.168.199.8:80. It is accessible from the local network, but when i'm trying to reach it by external ip, i go to my router's web-page. So I ...
0
votes
0answers
746 views

svn connection timeout

I have Ubuntu 12.04 running in virtual box inside Windows 7. I have the network adapter set as NAT and everything networking wise seems to be running smoothly (internet / git ect.). However, for some ...
1
vote
1answer
140 views

NAT forwarding not working

I tried to set up forwarding from eth0 to wlan0 in ubuntu: echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -F iptables -F iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE iptables -A ...
2
votes
1answer
6k views

Networking problem with Ubuntu as guest in VMware workstation on Windows 7 64bit

I've the following configuration: A. Physical machine: Windows 7 64bit with VMWare workstation 8 with a physical network adapter with this ip configuration: IP 192.168.1.101 Subetnet Mask ...
0
votes
1answer
208 views

Share internet connection from computer without NAT

Is there a way to use my laptop with a wifi card and provide network access to my laptop without NAT? I currently set up network manager to share the internet connection and I can browse the internet ...
1
vote
0answers
241 views

Connect to a L2TP server from Ubuntu Server 13.04

I need to establish connection with the L2TP-server (VPN) from my Ubuntu Server 13.04 machine in order to gain access to the Internet. How can i do this? I can find a lot of guides how to do this ...
3
votes
2answers
18k views

Configuring Ubuntu vmware guest NAT

I have a Windows host that runs guest Ubuntu VM via vmplayer. That virtual machine will be cloned, distributed among several people (running Windows hosts) and used for conducting a programming ...
0
votes
1answer
261 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 ...
0
votes
2answers
6k 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 ...
1
vote
1answer
1k 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
1k 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 ...
2
votes
1answer
506 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 ...
6
votes
2answers
724 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, ...
4
votes
1answer
3k 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 ...