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

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How can I get the Airport Extreme remote disk access function to work with modem that can't set as Bridge mode and can't disable NAT

I got the Technicolor tc7200 Docsis modem/rounter from ISP which can't set as Bridge mode, can't disable NAT, can't reserved IPs and its wifi are not stable at all. So, I made the tc7200 as the NAT, ...
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2answers
39 views

Setting up DHCP and NAT on apple extreme with Virgin Media SH (APPLE)

I'm currently going mad trying to get my Apple Time Machine to be the DHCP and NAT Server. I've turned off DHCP in the Super Hub config and turned DHCP and NAT on in the Time Machine. Doing this, I ...
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3answers
43 views

Routing to sub network with local DNS

Short and clean question We has domain that can be resolved and accessed from internet as ip. On host with that ip we has NAT and virtual machines that hidden behind that NAT. How can we give access ...
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30 views

Setup vpn to bypass NAT limits and portforwarding of ISP [on hold]

I have a problem with my ISP that don't let me have a public ip and open the ports to have an open NAT on xbox live. I read about the possibility to use VPN or buy a VPS server to open these ports. I ...
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23 views

How to fix NAT type-Strict on xBoxOne [closed]

I have a Motorola SBG6580, xBoxOne, directv genie and other deivces, and WOW as my ISP. For the last week I've been getting "NAT type-Strict" on my xboxone which prevents me from chatting and ...
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2answers
25 views

NAT how to configure with a VPN

Good morning, I'm in trouble. I need to be able to connect to my Windows PC (not locally) and I cannot open my router ports (my internet provider doesn't let me). So I've been thinking on creating a ...
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18 views

Zyxel Router Static IP setup

I need assistance with a static ip setup. The router is set up with the details for the static IP and the computer is able to browse the Internet and able to ping the static IP. The problem that comes ...
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16 views

Manage NAT using a tool

I have a Raspberry Pi on which I had previously installed Raspbian and am now installing another version on again. It is mainly used to be a test maschine for small programs and primarily as a NAT ...
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12 views

Why can't my second router (in DMZ) automatically find DNS settings?

I'm trying to set up my own router after the ATT modem/router combo. There is no bridge mode to bypass the ATT router. So I set up the DMZ to point to my personal router and wasn't able to get any ...
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1answer
27 views

How to reliably set up communication between the VirtualBox guest OS and host OS?

I have a VirtualBox (Windows 8 guest on a Windows 8 host) with NAT networking set up. I would like to set up the guest system to emit Growl messages that would be picked up by a service on the host. ...
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21 views

Internet gateway device protocol support?

As far as I understand, applications that need to transfer data across network address translators in a peer to peer fashion, like BitTorrent, usually rely on the UPNP IGD protocol to ask the router ...
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1answer
27 views

Accessing web service on routed (without NAT) network

I have network topology where I use two routers: R1 and R2. R1 has NAT enabled because my ISP allows only to connect one IP. R2 has NAT disabled because I'm planning to extend my network in the future ...
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2answers
54 views

Traffic redirection with Rasperry Pi router

I use a Rasperry Pi (running raspbian) as a wi-fi router. It redirects traffic from the Ethernet wire (eth0 - wire + ppp0 - L2TP connection, lx2tp used for it) to wlan0 (USB wi-fi dongle, hostapd used ...
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0answers
32 views

CentOS as home network router: IPTables Port Forwarding failure

I have currently set up a home server with a CentOS 6.6 installation on it. The server has two NIC interfaces which I'm using it as my router and DHCP server. Here's a diagram showing the network ...
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20 views

NAT Rule for PPTP Port Forwading

I'm under a very heavy firewall where only very common ports such as 21 and 80 are open. I installed PPTP on my own dedicated server (a Debian Linux) and I`m trying to connect it using Windows, but ...
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11 views

https proxy setup in NAT-ed clients

I have network setup as follows: I have 2 PCs. A and B. A is connected to Internet, and A and B is connected by local network. B can also connect Internet through A by NAT setup. In A, the NAT setup ...
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47 views

Public IP address port forwarding goes to my router's homepage and not my laptop’s server

I am trying to turn my laptop into an internal server to be accessed from anyone on the Internet. But whenever someone types my public IP address into their URL bar it sends them to my router’s config ...
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15 views

windows 2012 as NAT router

I want to use a Server 2012 R1 as NAT server. What I want to do is. I have opened for testing purpose, smb from Public IP1 to Public IP2. Users can access the SMB shares writing \Public IP2 in a ...
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1answer
30 views

Custom nameservers over wifi hotspots with initial web login

I have built a portable router using a raspberry pi. My setup works, unless I connect to a hotspot that requires some kind of web based login. After some investigation, I think I've tracked it down ...
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0answers
20 views

VirtualBox Network confusion?

I'm trying to adjust my VirtualBox guest network in order for my guest O/S traffic look like its coming from my Host. Can I do this with NAT? Here's a simpler outlook on what I am trying to achieve ...
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44 views

Behind ISP NAT Firewall - Need to remotely monitor CCTV's

Here's my situation: I have a DVR which is capable of allowing me to remotely view my shop CCTV's over IP.However, I'm behind the ISP's NAT firwall and have no ability to open ports on the router, so ...
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12 views

running rsync from vmware player vm using NAT to new server

I have been searching for days. I am trying to run rsync to a new server from a guest VMware Player VM using Ubuntu 14.04 NAT on the host Win7 pro server. I cannot setup a shell connections to the new ...
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37 views

If a port behind NAT sends a packet to a malicious host, can that host send packets to any open port, or only the port that sent the packet?

For example, a computer behind a NAT router uses Skype. Skype uses port 4000 to send packets to a server to establish indirect connections with other Skype clients. Since Skype had sent a packet to ...
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24 views

Change source IP of an incomming packet WIN7

I am receiving data through a specific TCP port and I would like to apply a rule on my Win7 Machine for my trafic (NAT??) : Every Frame coming from A --> Change Source Address to B & Every ...
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2answers
53 views

Port forwarding: how many routers between me and the internet?

I wish to ssh to a machine on my home network, so I intend to set up port forwarding. But how many routers are there between my home server and the external world (i.e. a global IP address)? I am ...
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23 views

vpn connected computer does not accept ports forwarded by router

My setup is like this: VPN Provider -- Internet -- Router -- Server My router has a dynamicDNS name which gets updated on every reconnect as well as a couple of ports that are forwarded to the ...
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1answer
40 views

Nagios configuration to monitorize virtual machine using Hyper-V with NAT

I will start by thank you very much for any help that i may possible have from any of you. I have a centos box that have nagios installed. I'm able to monitor several servers so far but I’m stuck in ...
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1answer
26 views

Is there any benefit in activating NAT loopback for basic video gaming? Does it help a PS4 use UPnP?

I have a router that I can turn on and off NAT loopback. The router is just used for game playing and phones and normal everyday Internet browsing. My question is this will there be any benefit to ...
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70 views

How do routers avoid port clashes when DMZ and NAT are used?

NAT in consumer routers makes the router translate a request from an internal device on a private IP (say dev0) and a specific source port X to a request from it's own public IP at a different source ...
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47 views

Wireless router in “Client Bridge Mode” with roaming capabilities

Scenario: We are looking for a device which can connect wirelessly to a network and supports both NAT & Port-Forwarding AND is able to roam seamlessly between different APs. So far we have ...
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1answer
216 views

Remote SSH access doesn't work when OpenVPN client is enabled on DD-WRT

I have a DD-WRT router which I would like access remotely via SSH. The DD-WRT is behind an ADSL router which has port forwarding for port 22 enabled, DD-WRT SSH access and service are set to port 22, ...
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36 views

How can I tell if my NAT Gateway is a Full-Cone NAT (one-to-one) or a Restricted-Cone NAT?

Since a Restricted-Cone NAT blocks incoming packets from sources which I did not sent a packet to first, I feel as if it is more secure, unlike a Full-Cone NAT. However, I am not sure what my NAT ...
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1answer
50 views

Need clarification for Sonicwall “Public Server” wizard NAS policies

I used the SonicWall TZ105 "Public Server" wizard to add NAT policies for an internal (non-DMZ) server, but I do not understand the need for all the Custom policies that resulted: # Source ...
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75 views

vagrant guest connection problems

I have VirtualBox 4.3.22 on OSX 10 with guest additions installed In VirtualBox I have: Vagrant/CoreOS guest vm in NAT networking mode with eth1 addr 172.17.8.101 Ubuntu 14.04LTS guest vm in ...
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1answer
54 views

How does a IP packet from a remote server “find” a home computer behind a NAT firewall?

I understand communication between a remote machine, e.g. a webserver and users home computer/device can only occur if the users computer initiates the communication (assuming your firewall/network is ...
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2answers
35 views

NAT and UDP source port

My question is somewhat extending on this discussion: NAT and UDP replies Scenario: Machine A behind NAT Machine B on the internet machine A:Port M sends a UDP packet to Machine B:PortN Machine ...
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1answer
50 views

topology for an unmanaged switch (firewall)

I'm considering an unmanaged switch. My understanding is that many of these devices explicitly lack a firewall. In that case, what do you use as a firewall? I suppose one option would be to use a ...
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42 views

OpenVPN sans port forwarding on unfriendly networks

I have a problem. I'm about to move onto campus right in the middle of the semester. For a student, I have a complicated network setup where all of my systems are reliant on NAS and all of them VPN ...
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16 views

Iptables Port Forwarding To Different IPs Based on Port [duplicate]

On a CentOS 6 server with an IP address of 172.16.1.10, how can I configure iptables to route traffic destined for 172.16.1.10:80 to 192.168.1.10:80, and traffic destined for 172.16.1.10:8080 to ...
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26 views

What is wrong with this description of NAT as it relates to home networks?

I gave the following description of NAT address assignment as it relates to home networks as part of an answer on stackoverflow. For more details the full stackoverflow question is here ... Your ...
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1answer
121 views

No data received (Error code: ERR_EMPTY_RESPONSE) when accessing goo.gl short URL

I have a strange problem. I cannot access a web via goo.gl short URL on any browsers (Chrome, Safari, Firefox). I'm on Mac OS X 10.10.2 The status bar will show "Waiting for goo.gl..." for 30 sec or ...
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1answer
35 views

VMWare: Linux host doesn't get NAT connection from Windows Host

I've been trying the last couple of days to get NAT networking to work. I am running VMWare workstation on Windows 7, and installed an Ubuntu image. The image starts up fine, but the vm does nmot get ...
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70 views

Redirect traffic destined for IP and port

I have a program that wants to connect to 1.2.3.4 on port 5678, but it can't because the port is blocked on our network. However, I do have an SSH tunnel set up that redirects localhost:5678 to ...
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16 views

virtual network setup for NAT?

Trying to test NAT traversal for FTP. For that I need to setup 4 VMs with 2 interfaces each. I was thinking of creating a virtual network & testing on that. what are the virtual network simulation ...
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117 views

Securing remote access to local server behind NAT router

I want to remotely access a Linux server in my private local LAN via HTTPS and SSH. The server ist connected to my DSL router (German Fritz!Box). As I can't directly access my server because of ...
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1answer
77 views

slow internet access when routing via a server (both using iptables NAT and ssh tunnelling)

I have a spare computer powered by a dual core intel atom N550 CPU and 2GB RAM (I will refer this as "the server"). It is running lubuntu 14.10 x86 (32 bit) with lightdm service disabled (hence, no ...
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2answers
271 views

How to link two routers LAN to WAN

My former modem was replaced by a all-in-one modem/router (10.1.9.1/24) after a speed upgrade. I still have my DD-WRT router (10.1.10.1/24), which I want to be my main router, i. e. as DHCP server, ...
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2answers
153 views

Router to Firewall to Internal network NAT with Single Public IP

In an effort to learn more about networking I have picked up some old Cisco equipment for home use. I have a 2811 router, a PIX 515e firewall, and a switch (don't remember the model). My incoming ...
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1answer
123 views

Can't find other computers in network when using NAT in vmWare

I have created a Windows 7 VM using vmWare Workstation 10 on a Windows 7 host computer. The host computer has three LAN connections. The VM accesses two of them via bridged networking, which works ...
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241 views

Forward a port to all users in Mikrotik RouterOS

In short: I want to know how to forward certain ports on Mikrotik's RouterOS. I looked up online and found several videos/tutorials but for whatever reason, I cannot do it. Please read below for more ...