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

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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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107 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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1answer
359 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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806 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
73 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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1answer
63 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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48 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
498 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
261 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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1k 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
2k 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
584 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
3k 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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1answer
61 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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2answers
548 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
27 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
214 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
107 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
59 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
1k 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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0answers
200 views

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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3answers
38 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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31 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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108 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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146 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
3k 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
750 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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1answer
27 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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166 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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1answer
337 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
159 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
723 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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1answer
2k views

Share local folder over Internet

How would I share a folder over the Internet and also have the machine on a LAN? The internet connection has a fixed IP. The purpose would be to host an Access backend. I know Access doesn't work ...
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227 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
865 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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347 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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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
253 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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1answer
293 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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1answer
565 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 +---------+ ...
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273 views

Network adapter connected by NAT has same address as host

I have created a virtual machine with 2 network adapters, one connected to the host using NAT and the second connected through a host-only adapter. This set-up works for what I want to do, Give the ...
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1k views

How to configure AirPort Extreme as the DHCP/DNS/NAT server where DSL modem/router does them?

I have an AirPort Extreme BS and a modem/router (ISP's NetMaster). I want to host my own websites from my Mac Mini with OS X Server. At the moment, ISP's router is the DHCP/DNS/NAT server, and AirPort ...
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1answer
5k views

Why is my connection refused when port-forwarding?

This question is related to this: Application / Device setup for remote network connections I have a 2wire 3801HGV router and I made some firewall settings to open some ports on one of my connected ...
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1answer
448 views

NAT with IPv6 (Forced by ISP)

My ISP has recently decided that "high bandwidth clients" are now forced to use IPv6. While I can plug my laptop with Win7 directly into the modem and I have access, connecting routers or my ...
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2answers
3k views

iptables gives me the error “can't initialize iptables NAT”

I am trying to use iptables and it is giving me the following error root@vikkyhacks:~# iptables -t NAT -L iptables v1.4.18: can't initialize iptables table `NAT': Table does not exist (do you need to ...
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1answer
538 views

Home router with NAT makes internet much slower than with bridged-IP

I have a BeWAN iBox A5100 wireless router and a 100 Mbps direct internet connection (non-DSL). When I use the bridged IP option, speedtest.net reports downlink speed as 85mbps which is quite OK. When ...
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310 views

Iptables filtering and NAT with secondary IP address

I have two IP addresses on my physical eth interface. Lets say 192.168.10.7 (eth0:0) and 192.168.0.7 (eth0). So it works. But I use application, working on the only one of this addresses on port ...
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1answer
34 views

Use a PC as a one client router/switch

I have a laptop running win7 , with two network cards wifi and normal wired (RJ45). I normally use the wifi for internet connectivity (Via a personal router). I have a raspberry pi, also with a rj45 ...
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1answer
1k views

Disable NAT/bridge LAN to router's network

I'm at a third world country, connected to a neighborhood ISP (an ISP that serves neighboring neighborhoods) and they have some "value-added services" where they have FTP servers and Windows shares on ...
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58 views

How do I configure NAT to forward external requests?

I have three Raspberry Pi's connected to Linux machines and one computer (also a Linux machine) connected to a router which is connected to the Internet. My goal is to configure each Raspberry Pi and ...