Network Address Translation, a technology used to translate a private IP address into a public IP.

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No internet connection in Virtual Machine on selecting NAT in VMWare workstation

I'm facing this strange problem from yesterday where if I select NAT as the network adapter in VMWare, I'm not getting any internet connection in the VM. I have a requirement where I have to have the ...
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1answer
62 views

Virtualbox -> Can't add 2nd adapter to network for VM

I have a Debian Wheezy VM running in virtual box with the 1st adapter being NAT. However I want to also add a Host-only network but I can't add 2nd adapter to network for VM, it is grayed out. Any ...
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1answer
188 views

Odd packet loss through NAT with two WAN interfaces

I have got a Linux server machine which I also use as network gateway / "router". It has three network interfaces active – two network interfaces connected to the internet over different ISPs and the ...
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1answer
140 views

Editing IPTABLES nat rule in cron job

I am sitting here with an issue: I need to switch the source interface for iptables' NAT rule at a given time. I want to basically do soemthing like this - caution: concept code: #!/bin/bash if [ it ...
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104 views

NAT Loopback stops working after a few days

I bought an Asus RT-AC68 and set it up as a DHCP (10.0.0.*) behind my FIOS Westell 9100em router (192.168.1.*). The FIOS Router is set to DMZ-mode, and points to the Asus RT-AC68. The FIOS router has ...
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2answers
93 views

How To Obtain IP from Public Wireless Router and Share via My Own Private Wireless Router? [duplicate]

I live in an apartment with a public wireless router which requires you to log in via a splash-screen page. I want to have my own private wireless router which logs into the public wireless router ...
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20 views

NAT to remote computer

PC A (Windows 7) can create TCP connections to PC B (Windows XP) but B can't make outbound connections to anywhere due to firewall rules. If I need B to connect to a host in the same network as A, I ...
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35 views

Change current internet connection interface

I am at a dorm, where the internet is shut down at 11.30PM but I own a Vodafone dongle and I would like to automate the NAT setup, so that at 11.30pm, sakis3g is invoked to connect ppp0 to the ...
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1answer
308 views

With VMware Workstation, how can I SSH from the host to a guest with NAT?

My host is Windows 7 with VMware Workstation 10. I am running an Ubuntu 12.04 guest that is connected to an NAT network. How can I set up the network so that I can SSH from the host to the guest? I ...
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2answers
2k views

How to configure cable modem router to allow port forwarding to other connected router?

I recently got a new cable model that also acts as a router. I am not super thrilled about it, but this is what my provider gave me. My previous setup was using just a cable modem and my current WiFi ...
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973 views

NAT Port Forwarding in VirtualBox

I have enabled two adapters in my VirtualBox (running Ubuntu 12.10 Server Edition), with types as: Host-only and NAT. My main motive is to be able to connect two VMs running on two different hosts ...
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3answers
329 views

How to communicate with devices that have the same IP address

I have a situation where I need to communicate via telnet to multiple devices that have the same IP address. The context is that I am writing a "final test" of devices in a manufacturing facility. ...
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79 views

Windows 7 Samba-Server Access via Routing

My Network is split up in 2 Sub-networks (network 1: 192.168.240.0/24 and network 2: 10.0.0.0/8). Network 2 has a Samba server on it. Both are connected via a router, network 2 is reachable from ...
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212 views

VMWare Fusion 6 Nat translation issue

I have the following network diagram, using VMWare Fusion 6 I am able to ping from the en0 interface on my mac to all of the 172.16 network, and on the custom linux kernel (2.6.x) base I can ping ...
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494 views

VirtualBox and Samba 4 on Linux Guest (NAT and Host Only)

Gentlemen, I really need a help from you to configure the "Samba 4" using the "Virtual Box". Here's the situation: In certain networks where I work, the Samba 4 works, in other does not. The guest ...
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1answer
61 views

Forwarding all traffic to other server with iptables

Assume I have a sever with X.X.X.X IP address and a web server with Y.Y.Y.Y IP address. How would I forward web traffic from X.X.X.X to Y.Y.Y.Y using iptables? My servers run Linux and use iptables
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58 views

How to setup my machine so I can reach my website from inside and outside my network?

I have a home web server and I cant access website from the external ip when inside my local network (due NAT loopback). Im trying to be able to seamlessly access my sites from outside and inside my ...
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37 views

Apple Store Content Downloading Errors

Setup: I have two iOS devices and a Windows PC with iTunes. I am trying to download newly purchased music, book, app, or update an app from the Apple store over my LAN. The LAN has two routers between ...
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2answers
245 views

How does Network Address Translation (NAT) works on a home router? [duplicate]

I have three computers connected to a router at home. I am sure my router has only one address. When the packet arrives from computer 1, the source IP is translated to the router IP address. Let's ...
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1answer
112 views

Linux nat with a secondary ip address

I want to setup nat on a server/router with a multiple public ip addresses (on different subnets and with different gateways, but the same physical ethernet interface), using address A for all local ...
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771 views

Why can't I access MySQL server with port forward rule in router?

This is my setup (the relevant parts, anyway): I have port forwarding rules in place (in the Linksys) for all the relevant ports and I've restarted that router multiple times, each time hoping that ...
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1answer
868 views

Forwarding all incoming traffic on eth0 to go to eth1

I am trying to setup my raspberry pi to sit between my router and my modem. I'm basically trying to set it up as an intercepting proxy so that all web traffic goes through the proxy. I have the ...
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1answer
333 views

How would I test to see if I'm behind carrier grade or regular NAT?

Inspired by the comments to this answer and its question. Some of my local ISPs are using carrier grade nat, and as someone who occasionally runs his own servers, remote support, it would be highly ...
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1answer
2k views

Multiple static WAN addresses on Asus RT-N66U?

I'm trying to configure multiple static IP addresses on my new Asus RT-N66U router, I had fiber installed yesterday so my old Thomson router won't work any more unfortunately. Previously I ran a ...
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37 views

Is it possible to turn off NAT on some cheap wireless router?

http://amzn.com/B001FWYGJS I have several TP-Link and other brands' wireless router like that in above amazon link. They seem in common to default to not allow user to turn off NAT when I want to ...
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137 views

Connecting to an SSH server behind a NAT

I am having trouble connecting to an SSH server behind a NAT on an ubuntu workstation. I've installed openssh package(both the client and the server) and forwarded port 22 through the NAT and tried to ...
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1answer
21 views

Grabbing DHCP from DMZ?

Is it possible to grab DHCP from the DMZ of a router above? Essentially i want to have a setup like this. DMZ DHCP ------> Router (master router) | | ...
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1answer
135 views

Home LAN - heterogeneous network with two SOHO routers as WLAN Access Points - Failing

I have the first world problem that my home requires more than one WiFi access point (AP) to have coverage throughout the house. PROBLEM My wired router, directly connected and adjacent to my cable ...
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1answer
76 views

How to NAT to different interfaces under linux?

I have an Ubuntu 12.04 server with 4 ethernet interfaces, 2 of which connect to nonconfigurable network devices on eth5 and eth6. Each device can only be reached on 192.168.100.1 via telnet. I believe ...
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1answer
49 views

(Not all) port forwardings working correctly

I have two port forwardings configured on my internet router: router-external-ip=85.93.c.d:22 --> internal-host:22 router-external-ip=85.93.c.d:8010 --> internal-host:22 (Having only the last one ...
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2answers
469 views

Two network-ranges, one gateway - Double NAT issue

I have one network 192.168.0.x which is slowly running out of IP addresses. I wanted to remedy this by creating a second network for mobile devices (192.168.1.x). The first network has a gateway of ...
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unable to configure nat on centos 6.4

i have configured nat on my centos 6.4 on vmware workstation with the following cofiguration i have two ethernet adapters eth0 and eth1 eth0 has public ip automatically taken by dhcp eth1 has private ...
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36 views

Networking overview

I've been reading about networking hardware and network technologies recently, but I still can't quite link everything together. The route: Internet -> Modem -> Router -> Wireless Access Point ...
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30 views

Custom Local Direct Route Windows

I have an external IP address of a load balancer that I want to route locally for internal servers. What's the best way to do this? I was thinking I could use the command line route command to add a ...
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92 views

client still cannot get internet access from gateway pc

I have already set up a laptop as a gateway in ubuntu 12.04. with 2 interface cards. internet >> eth0 >> gateway pc >> eth1 >> Access Point for eth0 IP dhcp for eth1 Static Ip 192.168.5.1 Access ...
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102 views

Wifi extenders: sharing private subnet

Apologies if this is a duplicate, it probably vaguely overlaps other questions. I want to create shared folders among home computers and laptops etc. running windows and linux (workgroups / samba). I ...
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1answer
2k views

VMWare Workstation VM Windows with static IP has no Internet Access

I've looked for answers first because it is probably basic e.g. http://serverfault.com/questions/220539/cannot-using-internet-in-vmware problem: on my vmware client machine (windows server 2008R2) I ...
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3answers
312 views

Free VPN soft/service to connect two computers over internet behind NAT [duplicate]

I have two computers (home and work) that I want connect to VPN. Both computers are behind NAT. I have no access to network configuration so configuring VPN server on router is not possible. Is there ...
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24 views

In P2P networked applications is there a point to portforwarding at one level but not the other?

I connect to the internet through a VPN service that offers port forwarding. I'm wondering if there would be a point because the regular Ethernet connection I connect to the network through is behind ...
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155 views

Use single static IP for multiple machines

I currently have a DSL modem at home that has a static IP (say 77.77.77.77). This modem is connected to a wireless router which has a few machines connected to it. For sake of simplicity, from now ...
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242 views

How to configure a Linux NAT router with a single NIC

I have several Windows Servers running on an Azure virtual network with 2 subnets. I have a domain controller at 10.0.0.4, and servers at 10.0.1.4, 10.0.1.5, etc. I configured a point-to-site VPN, so ...
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1answer
115 views

How does uTorrent can automatically forward port through Linux Net Filter based firewall?

I have dilemma: How it is possible that uTorrent shows on my internal machine with internal IP, that my connection is OK (green check in the bottom right of its window), while I never forwarded any ...
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3answers
501 views

How to set up SSH tunnel between 2 machines behind 2 different NATs

I have Windows PC behind a NAT/Firewall at home, and a Windows PC behind a NAT/Firewall at work. i.e. Neither PC has a publicly visible IP address. On each of the PCs, I am running a Ubuntu VM on ...
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2answers
192 views

Router Behind A Router

My condo building provides wifi. However they have a stupid terms of service window you have to accept before getting access. I wrote a script that can post automatically to that terms of service ...
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1answer
429 views

How can I get VMware Fusion to give a static IP to an Ubuntu guest?

I looked at How to assign a static IP address to my VMWare machine? and didn't find an answer: I am running VMware Fusion on Mavericks with an Ubuntu Saucy guest, the guest connected to the network ...
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299 views

Squid proxy server vs NAT rule of Mikrotik router

I have installed squid proxy server to hide our network ips after some time it becomes slow then I read through NAT rules to achieve what I want by proxy server. As per this link the difference ...
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3answers
54 views

PAT Internals. How is it de-multiplexed?

Question: Assuming PAT is enabled on my home internet router, how does my router know which hosts to de-multiplex packets to when it receives packets from the internet? Example: On my LAN there is 2 ...
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2answers
220 views

OpenVPN connect to server not accessible from internet

My ISP sucks at IPv4, so they are NAT'ting one public IPv4 to multiple customers (they call that DSLite). The problem is: I can't open ports for incoming connections. My public IP can't even be pinged ...
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240 views

How to route to public IP addresses from NAT where gateway is in subnet of target public ip addresses

I have the following scenario which is giving me fits. I have a block of IP addresses on a .248 subnet. The service is Comcast, and the modem uses IP addres ending in .246. On the router for my ...
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320 views

iptables NAT doesn't preserve remote IP

I have the iptables rules below forwarding incoming ssh traffic on port 2222 to a virtual machine running in a vmware "vmnet" network on the same host. 192.168.1.1 192.168.1.40 +---------+ ...