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

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Usage of two Routers on LAN

I've currently own a Linksys E4200 and a Thomson 546v6. Because I have an IPTV service I must set the Thomson as the main router connected to the phone line so that I can distribute the video signal ...
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1answer
317 views

Stopped windows firewall service during ICS, how is this possible?

Although windows firewall is required to be on when you "start" Internet Connection Sharing, you can stop the WF service with MMC. When done a client can still use the host machines internet. The ...
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8answers
43k views

How to get my external IP address (over NAT) from the Windows command-line? [duplicate]

The Windows "ipconfig" command can only show me the parameters from the Ethernet interfaces from my machine (even with the ipconfig /all argument). It can show detailed information about the ...
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1answer
8k views

How can I connect DLNA devices through NAT?

I have a Windows 7 PC running Serviio as a DLNA server. I have a Samsung I9100G running Skifta as a DLNA renderer (client). My network topology: At the moment, I can connect and watch my videos ...
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1answer
685 views

Setup a vpn server with a static IP with NAT and port forwarding

I have a Debian VPS with an assigned static IP. I want to setup a virtual interface (with an ip like 192.168..) on my laptop (Ubuntu, dynamic IP) linked to the remote VPS, so that if I bind sockets to ...
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4answers
212 views

Are there any home ISPs that offer external IPs for all devices on the network? (No NAT)

NAT is a a real pain, and the large address space in IPv6 doesn't need it. Are there any ISPs that offer actual home routing, giving each computer a global IP address, rather than a local one? This ...
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1answer
3k views

iptables trouble: nat with ip alias (virtual interface) not working

I'm setting up an Ubuntu 11.10 server to act as firewall for a network running several different SSL websites. The idea is fairly common: have all public IP's for each site aliased to the public ...
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5answers
987 views

How do sockets deal with routers?

(Not sure if this should be on the unix stackexchange site...) When I make a socket I use IPv4 and a port number. So if I know both of these, but there's a router set up (on a home network; just ...
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2answers
6k views

How to identify internal ports and external ports that are mapped by NAT by the router?

For example, my HTTP port 80 is opened and mapped by the router to port 42300 facing outwards. Is there a way to identify , let's say my port 150 that is open for connection is mapped into what ...
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1answer
1k views

Connecting to my own network via external IP

Even though I have seen and read quite a few similar Q's I was still unable to understand what is required for me to be able to do this. I have an internal network. One of the machines is a web ...
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0answers
562 views

VMWare networking mode (NAT)

I've created a new WinXP vitual machine on my win7 using VMware player. This virtual machine is using NAT (10.0.0.0/24) and has a WAMP server running. I want this to be NAT as I want the server to be ...
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2answers
6k views

Will disabling NAT on my wireless router cause a performance hit on my DSL router?

I have a Thomson TG508v2 router/modem and a brand new AirPort Extreme connected to it. At first, I set the AirPort Extreme to "share a public IP", which enables DHCP/NAT. Everything works great but I ...
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1answer
5k views

VirtualBox NAT over proxy

I use VirtualBox 4.1.8 on a Ubuntu 10.04 host system. I have an HTTP proxy server on the host system. How do I configure the VirtualBox to NAT the virtual machine's network and use the HTTP proxy for ...
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2answers
80 views

A server which uses 2 IPs and is needed to give service (under NAT)

I have an internal server, which uses a certain service. This service listens on a port, and speaks on a different port. The problem with the service is that it can't listen and speak on the same IP ...
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1answer
91 views

Why Wireless NIC Loses Its Lease To Router?

This constantly started to happen some time ago. I connect to my router andand lose every few seconds connection to router and it reconnects again. I have screenshooted most errors that Event Viewer ...
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0answers
1k views

VirtualBox - Cannot talk to guest via Host-only

I am running CentOS 6.2 with SSH enabled on Windows 7 and I cannot access CentOS via my host. I have 2 adapters runnings, 1) Host-Only and 2) NAT. My problem is very similar to this one and I have ...
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0answers
480 views

filtering Internet traffic and caching on another machine using a dd-wrt router

In my home network, I have a spare machine which I would like to configure to filter Internet traffic (block ads) as well as cache content. I would like to tell my DD-WRT router to pass all Internet ...
2
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1answer
576 views

How to go around a modem's port forwarding incapabilities

This custom cable modem my ISP gave to me does not support forwarding an external port to a different internal port. (For example, I can't forward an incoming connection on port 80 to port 3389 on my ...
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1answer
221 views

Why does NAT64 require DNS rewriting?

When a IPv6 only host wants to reach a IPv4 only host, why does the DNS server (or possibly the NAT-PT gateway?) have to rewrite the A responses to AAAA? Couldn't IPv6 simply embed the IPv4 address ...
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1answer
209 views

What are all of these NAT terms? [closed]

I (loosely) know about Network Address Translation (NAT) in that the NAT device stores a mapping of external ports to internal ports. However, I started reading about it and got really confused by all ...
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2answers
582 views

What do the various IP addresses mean?

When I visit a website (e.g. whatismyip.com) it states that my IP address is 13.151.xxx.xxx. However, when I run ipconfig, my IP address is 192.168.0.xx for IPv4 and my DNS adress is 202.xx.xxx.xx. ...
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0answers
459 views

Mac OS X Lion - forward all connections on port 22 to external ip

I need to forward all connection to any address port 22 to a different gateway (i.e. no default). Firstly I suppose to do it with ipfw: sudo ipfw add 5 fwd $EXTERNAL_IP,22 tcp from any to any 22 ...
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1answer
80 views

Multiple Servers, externally, through single IP

Let's say, I have a server which is directly connected to the internet (no firewall), and sits on 66.77.88.99 externally and internally sits on 192.168.0.1. I have my domain's records set up so that ...
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2answers
2k views

VirtualBox network configuration

I have a CentOS 6.1 virtual machine, virtualized with VirtualBox on Windows XP. This machine hosts my local development MySQL server. I'd like to find the correct network configuration, so that: my ...
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0answers
213 views

What's on /etc/nat folder in OS X Lion?

As I tried to edit /private/etc/nat/autoportmap.plist, I accidentally modified permissions on the nat folder and asked Lion to apply it to enclosing items (I was giving myself write permission). As a ...
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2answers
1k views

Is it possible to statically assign public IPs and use DHCP on the same router?

My ISP has given me a set of public IP addresses I can assign to various devices. But they have been controlling everything, and I've had to call them to make any changes to the configuration. I'm ...
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1answer
2k views

Why is this iptables rule that does port forwarding not working?

I have a server bound to localhost:7060. It is using ipv6 socket instead of ipv4. Below is netstat outout. # netstat -an Proto Recv-Q Send-Q Local Address Foreign Address State tcp ...
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1answer
841 views

Linux PPTP VPN and gateway woes

I have an Amazon Linux machine running in an Amazon EC2 instance. I am connecting to my office's VPN as follows: sudo pppd pty "pptp pptp.<DOMAIN>.com --nolaunchpppd --loglevel 2 --debug" file ...
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1answer
780 views

How can I route internet traffic via another computer to sniff the connection?

I need to do port forwarding on Windows 7. I have machine A that runs a program, which connects to the internet. I need to debug this connection, and I can't install a sniffer for checking the packet ...
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2answers
2k views

How to access a computer behind two NAT routers? [duplicate]

For technical reasons that I cannot change my computers at home are located behind two routers, only one of which (the one connecting my own network) I have control over. Basically the setup is ...
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3answers
344 views

How is an HTTP proxy different from a NAT box?

A host in a LAN with IP (10.0.0.1 TCP port 8888) connects to a server without knowing there is a NAT box at the network edge. The NAT box is dumb and just translates port 8888 to some other port 5555 ...
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2answers
491 views

How can I access an IPv6-only host from a Windows 7 computer behind an IPv4-NAT?

I have a computer with Windows 7. It's connected to Internet via an IPv4 NAT router. How can I access a host that is only accessible with IPv6? Is there an easy way to configure the Windows 7 Teredo ...
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votes
1answer
93 views

How can I view different internally hosted websites, set up as virtual hosts?

I have an old machine that I've converted into a web server. I'm wondering what the best way to make the websites viewable on the internal network, without using a proxy. I experimented with BIND, ...
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4answers
2k views

setup web server behind a router

I want to turn a laptop with a broken monitor into a home web server behind a wireless router (buffalo airstation). I removed all ubuntu gui packages and installed lighttpd. The laptop has a fixed ip ...
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2answers
1k views

Redirect subdomain to internal IP

I have a Fortigate 80C at home and have a number of servers hosted: mail, git, web, RDP, voip etc. Now I want these subdomains to redirect to certain internal IPs: mail.domain.com > 192.168.0.200 ...
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2answers
272 views

Without NAT on IPv6, and only one DNS name, how do i talk to my servers?

Right now we own one domain name (e.g. superfault.com). From the internet i can connect to a variety of networked devices using that single DNS name: superfault.com ...
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2answers
263 views

NAT Helper for HTTP

I'd like to expose a Web server available on an intranet (local IP address behind a Firewall + NAT) to another client on Internet or different LAN. Since I can't do anything on the firewall (ex. ...
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1answer
678 views

Redirect Port on Mac to VMWare

So...I have started working as a front-end developer in a shop that does .NET. I use a Mac and have a VMWare image with Visual Studio and the project on it. The project runs great. However, I was ...
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2answers
3k views

SSH connection between two behind-nat computers through third public-ip computer

I have a computer at home (home-server) that runs irssi, rtorrent etc. My ISP is blocking every traffic from outside (dumb, I know, but it's the only ISP I can have). I want to be able to log in into ...
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1answer
512 views

Shorewall NAT problem

I have installed and configured Shorewall with two ISPs. I want to provide Internet access to the clients and the other connection for servers connection and NATs. I can navigate both from the ...
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2answers
608 views

Understanding port forwarding and NAT

I've got some confusion about port forwarding vs NAT. I know the problems NAT causes for P2P, and that there exist some solutions to it (STUN,TURN,etc) which require a relay server to setup direct ...
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1answer
678 views

Linux router frequently drops connections

Until a few months ago, I had my Linux desktop serving double duty as a router for my home network, and all was well. Then I set up a small Linux machine to act as a stand-alone router, and since ...
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2answers
551 views

Firewall in front of device with public IP address

Is it possible to have a firewall in front of a device with a public IP address without getting in the middle of NAT? I have a server that I need to put on the internet, but I want to put a firewall ...
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0answers
69 views

NAT through VPN

I'm currently trying to access a resource located inside a VPN. For development purposes I need to use programs I don't have on the laptop that connect to the VPN and - for reasons that still escape ...
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2answers
96 views

Translating an IP Address again

I have a question about NAT(Network Address Translation). is it possible to translate an already translated IP address? would you please guide me why it is possible or impossible?
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3answers
9k views

Bridged vs. NAT: a Virtualbox and VMWare Comparison

I installed VMWare Workstation 7.1.x and Virtualbox 4.0.8 on two different hosts, so I could compare. I set the virtual network adapter on both to NAT, which was successful for both. The result: ...
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1answer
521 views

Rackspace Firewall/Gateway Setup

I have rackspace account and wish to have this sort of setup: Firewall/Gateway eth0 - Public IP (56.X.X.X) eth1 - Private IP (10.X.X.X) Ubuntu 10.10. Accepts connections from the internet and ...
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2answers
3k views

Can't access vm from other computers in the network

HOST OS: windows 7 64 Guest OS windows server 2008 32 Vmware Worstation 7.1 Network Connection Type: NAT I can access my application from the guest os using the computer name or localhost but if I ...
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1answer
115 views

route packets for 2 eth's

I have 2 ethernet cards on my 1st computer eth0 10.1.1.254/24 eth1 10.2.1.254/24 eth0 is connected to 2nd computers eth0 using crossover cabe which is 10.1.1.1 I can ping computer 1 eth0 from ...
1
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1answer
864 views

Network problems after installing text-only Fedora 14 using VirtualBox

A small background. I've just subscribed to virtual dedicated server running Fedora 14. But before starting to setup it, I've decided that it is a good idea to try all installing/configuration on my ...