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

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694 views

TCP/UDP hole punching from and to the same NAT network

I was wondering if tcp/udp hole punching would still work when you are in the same network (behind a NAT), and what the packet's path would be. What happens when using hole punching on the same ...
4
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2answers
3k views

No internet on host OS (OS X Lion) when VMware Fusion is running

I have installed OS X Mountain Lion as a VM in VMware Fusion (version 4.1.2) for environment testing. The host OS is OS X 10.7.4, and is connected to the internet via a wired connection (in fact I get ...
2
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3answers
4k views

NAT vs public IP (and blocked ports)

I have a problem with my ISP. They say that they don't block any ports and I have public IP, while I think these both statements are false. Before I talk to them again (which is really tough when my ...
0
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3answers
416 views

Connecting to FTP server that's behind a NAT [duplicate]

Possible Duplicate: What is port forwarding and what is it used for? So I want to allow my machine behind NAT to be accessible via FTP. However, as it is behind NAT, it is not possible to ...
2
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2answers
2k views

Better ways to setup a webserver behind ISP's NAT

Our entire road is behind an ISP NAT that I can't access. Our ISP wont forward a port either. My workaround, I setup an ipv4 to ipv6 tunnel using freenet6. I get a domain like ...
0
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1answer
450 views

How can I ssh into my home computer from the internet?

Is there software that will help me to ssh/connect to my home computer from the public internet? (Say, a coffee shop). I understand that questions similar to this have been asked, but none seem to ...
0
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2answers
956 views

Can I know what IP address my home network has? [duplicate]

Possible Duplicate: Fastest method to determine my PC's IP address (Windows) I'm not sure the title of my question is appropriate, and I'm not sure my question is going to be ...
2
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1answer
230 views

NAT/PAT, URL dependant, cisco 7301

I need to configure cisco 7301 with list of hostnames/ip's. These need to be forwarded to internal ip's/ports (depending on the hostname) In the current setup... www.frog.com, ip 82.45.100.100 nat's ...
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1answer
1k views

Can I create a reverse ssh tunnel by using my Android phone as the middle man?

I am trying to connect my home linux laptop and my work Windows 7 computer. They are both behind NAT w/ firewall and neither allows port forwarding. I cannot control the NAT, firewall or port ...
0
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2answers
801 views

Weird slow uplink problems on my home Debian router and new fast connection

Yesterday I got a new and shiny VDSL2 connection home! It's specced at 100Mbit/10Mbit, and seems to deliver pretty close to the mark. Now, I have a Debian squeeze linux box acting as a home NAS and ...
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4answers
4k views

how to ssh two computers behind NAT and Firewall, without third computer

I am trying to ssh into my Linux box at home. My home is a dorm-style environment - NAT and Firewall with personal laptop running Arch Linux. My work is corporate style Windows 7 - NAT and proxy ...
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2answers
407 views

How to browse my local website running on Mac OS X from my guest VMWare Windows 7 machine?

I am running OS X Mountain Lion as the host, and Windows 7 inside a VMWare Fusion 4.1.3 machine. I have a local website running on the host (under port 5000). I want to access this website from the ...
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0answers
149 views

How to provide “reverse ssh” to a shell?

Scenario: Many embedded devices (running Linux) out in the fields, behind routers so NAT'd and we can't make connections to them. We need for a support person to be able to initiate a terminal/shell ...
5
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3answers
2k views

NAT and UDP replies

Sanity check please. If I send UDP packets from Machine A behind a NAT to Machine B's port N, where Machine B is outside the NAT (elsewhere on the Internet), can I reasonably expect that NAT to pass ...
1
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1answer
309 views

Failover WAN with multipath

I'm configuring a dd-wrt router to allow access via VPN to a remote desktop server. The router will sit behind another router providing NAT. I'm configuring it with a backup 3G mobile broadband link. ...
1
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1answer
663 views

use computer as NAT router or proxy to share access by USB 3G dongle

I'm in a strange, fun situation with a dual boot windows XP/Ubuntu linux computer that is only connected to the internet via USB 3G dongle, and i need to connect another device that only has a ...
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3answers
1k views

How is traffic separated between internal and external IPs?

If I ping 192.168.0.X from my home network then it will attempt to look within my network for that address and not the external WAN IP. However I can ping 74.125.224.163 and it will ping google.com. ...
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3answers
3k views

enabling loopback NAT

I have a Qwest Aciontec Q1000 modem/router combo, which does not support loopback. I run a webserver on the LAN, and when I'm on the LAN, I can only access it by its local IP 192.168.0.201. When I'm ...
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2answers
9k views

How to connect wireless router to work network with NAT?

I want to connect a wireless router to my work network, but I want all the wireless clients connected to the router to appear as a single IP address to the "men in black" network admins. So I believe ...
2
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0answers
61 views

Linux VM can not connect to the internet

I'm trying to set up an virtual server with connection to the internet. When I start a ping to the local network, there are no problems. When I try to ping an address from the internet, it shows that ...
1
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1answer
2k views

can't ssh within LAN, but can connect from outside

A strange issue: I have a desktop running Ubuntu 10.04 behind a Netgear WNR1000 router performing NAT. I would like to be able to ssh into the desktop from my laptop (running Windows 7 and Cygwin). ...
0
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1answer
296 views

Connecting to network device behind NAT from local LAN using the external port and IP

I noticed at several different LANs connected to the Internet through a NAT the following phenomena. There is a server in the LAN and there is a port forwarding to reach this server also from outside ...
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0answers
188 views

Unable to open websites that use HTTPS on linux

I have the following network configuration: My PC 192.168.1.20/24 uses 192.168.1.1/24 as a gateway. Dlink-2760U router with Local address 192.168.1.1/24 has a VPN connection open with the provider ...
0
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1answer
98 views

NATing with a single-homed machine possible?

I have the following setup: a) a single-homed machine, A, that can see the Internet. b) other machines B, C, and D that cannot see the Internet. c) A, B, C, and D can see each other. d) all ...
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2answers
4k views

How will home networks work in the IPv6 world?

Right now, I have a home network setup behind a Netgear router. That router has a public IP address I get from Comcast. I also have a computer setup on my home network running Linux that runs a DHCP ...
0
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1answer
297 views

NAT works for Windows guests but not for Linux guests

I have just updated to VMPlayer 4.0.3 (from 4.0.1) on a Windows 7 host. All the various guests are configured for NAT networking and DHCP, and before the upgrade every OS could reach out the ...
2
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1answer
5k views

NAT vs Port Forwarding [duplicate]

Possible Duplicate: What is port forwarding and what is it used for? What is the difference between NAT and Port Forwarding? Are they two different names for the same thing? Could you ...
0
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1answer
279 views

Cross-platform VPN software in a firewalled environment

I am currently working on setting up a VPN in order to allow the control over some computers. However there are some problems that I am encountering in setting this up Many (if not all) of the ...
0
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1answer
216 views

NAT on MAC-filtered network

My ISP (Hyperion S.A.) provides internet using a UTP cable with MAC filtering. I'm trying to set up a router so that I can connect multiple computers to the network. Most computers would connect ...
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0answers
407 views

How do you set up port-forwarding on a SwissCom Motorola Centro Grande?

I'm setting up a Minecraft server and the NAT forwarding on my router isn't working. This isn't the first time I'm doing this - I previously did this with an Apache server (used to run a server) and ...
1
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3answers
100 views

In which network layer is the data located that lets a gateway(using NAT) know which computer a packet is meant for?

Main questions: In which network layer is the data located that lets a gateway(using NAT) know which computer a packet is meant for? Could someone explain how the process works? In explaining the ...
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2answers
5k views

How to alias an IP address to make DLNA resource accessible from different IP network

what I have I have a home wifi network 192.168.1.0/24 having DLNA resource 192.168.1.100. I have a TV with ethernet and a netbook with both wifi and ethernet interfaces. I want to make my notebook ...
2
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1answer
671 views

How to know if I am connected to the internet by NAT or something else that assigns me a public IP address?

I am connected to the internet through a proxy. When I went to What Is My IP, it shows a different address than that of my proxy. It's is showing the same IP address even when I connect through a ...
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0answers
424 views

Robust way to acces my computers behind NAT and firewalls?

I am searching for a robust way to access my computers (on any port when possible) whether they are behind several NAT gateways or not. By robust I mean I want to access the computers whenever they ...
0
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1answer
345 views

Forward Ports to a computer on the guest network (AirPort Extreme)

Is it possible to forward ports (ex: 80, 443, 21, 22, 23, 25, 110, 143, 3389, ...) to a computer on the Guest network a of AirPort Extreme ?? I have the both network enabled and I want my child to ...
0
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1answer
271 views

Push local traffic “outside” the nat

I have a server functioning as my nat that hosts some services. When I locally connect via UDP to this server it my client uses the public ip but the server answers with its local ip. So the question ...
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4answers
4k views

Why do we have NAT if we could just assign a public IP address?

If the private address block is simply used to allow the router to determine where packets can and cannot be forwarded from (because private addresses need to be unique on their own network, but can ...
2
votes
2answers
3k views

Frequent connection drops when playing online games (StarCraft 2, Battlefield 3) and behind NAT - how to diagnose?

I am having some trouble with (I suspect) my wireless router. It's connected to the internet with a regular lan cable and has a static, public IP address. Our two home PCs connect to the router with ...
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2answers
3k views

How can i setup a guest-guest network connection with virtualbox?

I have setup multiple guest hosts with NAT networking. On each hosts i have some portforwards so i can connect from my host (like 2222 to 22 host 1, 2223 to 22 host 2, ...). How can i setup a ...
1
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1answer
259 views

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 ...
1
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1answer
313 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 ...
10
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8answers
35k views

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

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 ...
4
votes
1answer
7k 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 ...
0
votes
1answer
626 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 ...
1
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4answers
209 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
865 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 ...
0
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2answers
4k 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 ...
2
votes
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 ...
1
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0answers
515 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 ...