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

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OpenWRT sending invalid packets to WAN when Android phone connects

I have a Netgear WR703N wireless router flashed with OpenWRT 12.09 "Attitude Adjustment" connected to my school's Ethernet network, and our IT department sent emails alerting me that it's ...
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1answer
1k views

RV130 won't pass http unless behind another NAT

I'm attempting to replace a Linksys WRT54G with a Cisco RV130 for a home internet connection. For the moment, the setup is about as simple as it gets. Cable-modem -> RV130 -> Switch -> Multiple ...
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1answer
80 views

iproute2: How do i connect one machine to the internet via another

I have the following setup: A > 169.254.8.125/16 <--(ad-hoc)--> 169.254.9.109/16 < B > 192.168.178.21/24 <--(wifi)--> 192.168.178.1/24 < AP/router > internet I want to connect A to the ...
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1answer
252 views

How to NAT between 2 network interfaces without impacting routing

My Linux-based router has 5 Ethernet ports. It is currently acting as a router between ports 1 & 2 and the dedicated WAN port, without NAT. Port 1 is 192.168.1.1/24, port 2 is 192.168.2.1/24, WAN ...
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1answer
232 views

VirtualBox NAT port forwarding configuration (<1024)

I'd like to forward requests from 127.0.0.1:80 to a guest OS in VirtualBox VM (CentOS 7) - 10.0.2.15:8080. Is that possible? If I forward 127.0.0.1:9090 everything works fine, but as soon as I ...
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1answer
43 views

NAT and UDP replies by default

If I send UDP packets from Machine A with local port M 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 would pass ...
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1answer
160 views

iptables does not seem to be applying SNAT to packets sent on a raw socket

I'm writing packets from a user space program to my wireless interface wlan0. I've set up a SNAT rule with iptables as follows iptables -t nat -A POSTROUTING -o wlan0 -j SNAT --to 192.168.1.3 And ...
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167 views

Disable NAT and have a direct WAN - LAN connection with just one PC?

I have a pretty old router which is behaving rather weird with UDP port forwarding (Seems to be blocking/not routing incoming connections). I need it to behave such that the cable is directly ...
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35 views

Trying to figure out NAT between modem and router

I just bought a new DSL modem and I'm trying to set it up optimally for my small home network. There are a few computers and smartphones which access the router which handles ethernet and Wi-Fi, then ...
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615 views

Setup router with 2 seperate LANs, one that pipes thru VPN, one that doesn't?

I use a VPN at home for privacy, but there are times where you do want your true public IP to be known. Like for Google Maps, or pizza. I currently use a software-VPN tool on my computer for this, but ...
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2answers
230 views

Switching to IPv6 - Do I need a router? [closed]

In the future, since every IP (IPv6 adress) is going to be global, we don't need to use NAT. So basically, why do I need a router on an IPv6-only global network? Why not just replace my router with a ...
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1answer
93 views

How to forward a port in VM which is behind NAT

I see a few questions similar to my but, they didn't answer my question. I have a router. I have installed Debian in VM and setup a ssh server on it. I want to forward a port for this machine on my ...
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1answer
687 views

SSH and PWNAT for SSH Connection Between Two Separate NATs

Is it possible to use pwnat and SSH to establish a "peer-to-peer" SSH connection between two machines that are behind two separate firewalls/NATs? If this is possible, what are the steps that would ...
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1answer
72 views

Windows wireless bridge with NAT

Here is my setup: I have a robot that I want to access remotely, but there is no wired connection. If the robot was configured to DHCP, I think could bridge the wired and wireless connections on a ...
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1answer
407 views

How to re-enable NAT on Netgear CG3100?

I just accidentally disabled NAT on my CG3100. Now I only have 4 public IPs for all the devices. I really need to re-enable NAT on my CG3100. How do I re-enable NAT on a CG3100?
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405 views

port forwarding in windows 7 to vmware

I have a windows 7 in a network with ip 10.1.1.74 and I have vmware with centos which it's ip is 192.168.160.129 and has configured as NAT with my local windows 7. I have set up a apache httpd server ...
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1answer
108 views

Double NAT with access to both gateway web interfaces

I have a Cisco Linksys E3000 home router that I appreciate. However, my new (but temporary) ISP will want me to use their Huawei router for their service once I get connected next week. This creates ...
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1answer
894 views

Switch with NAT/port forwarding?

I'm sorry for this basic question, but I'm stuck. I'm looking for some networking equipment that allows me to route WAN traffic (internet) to a client on a local LAN based on TCP/UDP port. That is, ...
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1answer
92 views

Why from a virtualized Ubuntu system I can't discover the ip address of my router?

I am not into computer network and I have the following problem finding my router IP address. I have a Windows 8 PC on on which it is installed VmWare Workstation that virtualizes Linux Ubuntu. The ...
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1answer
68 views

How can I specify which network to use for internet connection and which for viewing network computers

I have two Network Adapters on Windows 7 64 bit operating system which is installed on Oracle Virtual Box. I created those two adapters as follows: NAT VirtualBox Host-Only Ethernet Adapter If I ...
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1answer
555 views

How can I bypass my modem with NAT to open my ports to the outside?

My Internet provider gave me a Modem-Router with WiFi capabilities but it has all ports filtered for incoming traffic. What I'm trying to do is to use NAT in someway that allows me to recieve incoming ...
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1answer
93 views

Connect to internet through two gateways

I am developing a library to perform port forwarding in NAT devices. Using SSDP (de discovery process) I can see two different UPnP servers that implement WANIPConnection service type, one is my ADSL ...
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1answer
670 views

Where to place a port-mirroring switch for home network monitoring

I want to start monitoring traffic that goes in and out of my home network. I'd like to collect information like bandwidth usage and (specifically) HTTP requests from home computers to websites. From ...
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2answers
719 views

How can i find the ISP IP allocated to my Router?

I am using Router to connect to internet. How can i find the ip address allocated to my router by isp in windows 7? I cant use whatismyip.com since it will give shared ip if i am behind a CGN.
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379 views

How to expose local loopback to (VirtualBox) VM connecting to host via NAT (VirtualBox NatNetwork)

I'm using the VirtualBox NatNetwork type to connect most of my VMs to the host (with the required ports set up for forwarding). I'd like to know how I can connect to the local loopback ("localhost") ...
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2answers
139 views

Port based routing, 1 public mapped to multiple private ips

Simply put, I want this single public ip mapped into different private ip's based on port 111.1.1.1:80 -> 192.168.1.1:80 111.1.1.1:443 -> 192.168.1.2:443 is this a standard and possible?
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1answer
76 views

ADSL device providing No NAT DMZ alongside NAT (IPv4)

I have an ADSL modem/router/switch which performs NAT. It does this even for the one host it can be configured to provide a DMZ. I want to be able to perform Nmap scans from a specific host and there ...
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56 views

A lot of random NAT tables appear

My brothers Mac seems to be infected. It keeps on sending UDP and SYN floods to our router, and it multiplies my ping 10 times.When I look in the NAT Mapping table there are a lot of random address ...
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1answer
6k views

Fedora 20 NAT Configuration with firewalld

I'm trying to set up a simple masquerading gateway that will bridge between an internal network on ens33 (192.168.1.0/24) and a private network on ens37 (10.0.1.0/24). It's a VMWare image with two ...
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2answers
235 views

cisco wireless router not allowing full tcp handshake when in router mode

I have a recently-purchased cisco rv220w wireless router. My setup is as follows: Internet -> asa 5505 -> 10.0.1.0 subnet -> wireless router (subnet 10.0.3.0, public facing ip is ...
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60 views

Xbox to Sonicwall TZ180 [closed]

First, not sure if this is the right place to post this. I have a Xbox 360 hooked up to a SonicWall TZ180. The SonicWall is then connected to my TP-Link router which is downstairs. When I play games ...
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1answer
150 views

Implementing a direct TCP link between computers hidden by a router with a server managing the connection

I'm working on an encrypted chat program and I'm trying to work out a way of sending messages directly between two computers which are hidden by a router (each have their own local IP address and are ...
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245 views

Running Hyper-V Manager behind NAT

I am running Hyper-V Manager on a Windows 8.1 box behind a router (actually a VMware Fusion VM). When I try to connect to my Hyper-V box, I get an error RPC server unavailable. Unable to establish ...
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1answer
317 views

IPv6 only LAN with NAT64 router for Internet

I want to disable IPv4 on my LAN and run only IPv6. I will use a NAT64 Juniper firewall to provide Internet access since I only have IPv4 Internet. Will this break applications? Will I be able to ...
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171 views

How to share folders b/n VirtualBox and Win 7 using NAT adapter and Samba

When I had my Adapter set to Host Only I followed this tutorial and was able to view the folder # \samba\share\ only buy typing \\192.168.55.444 in my windows start up. So, this means I could share ...
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1answer
5k views

Accessing VirtualBox with NAT adapter using SSH

I have a CentOs 6.5 running on a VirtualBox. I am using NAT adapter and my inet addr is 10.0.2.15 But, I can't access this host using ssh root@10.0.2.15 I get ssh: connect to host 10.0.2.15 port 22: ...
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1answer
946 views

How to forward ports through ssh and nat to another machine

I have a problem when using ssh port forwarding and nat simoultaneously. Situation: Machine A runs a webserver on port 8080 Machine B is a raspberry pi which works like a little router. It has two ...
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1answer
182 views

Computer only accesses the internet when using a static DNS ip

My setup is wall-> Zyxel p-870h-51a VDSL2 modem -> DD-WRT router. The issue is that the modem has connected to the internet, but the computer is unable to. This is resolved if on the individual ...
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45 views

Blocking an outbound port for a bridge'd nat'd inteface

eth0 and wlan0 are bridged to br0, and have access to the outside world through eth1 and NAT. I'd like to block an outbound port on wlan0, but leave it open for eth0.
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1answer
166 views

packages from router dont match iptables dnat rule

I have the follow rules to forward port 443 from external to a internal host: IF_INET=ppp0 IF_INET_IP=1.2.3.4 # Router External IP IF_LAN_IP=192.168.0.1 # Router Internal IP ...
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3answers
10k views

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
3k 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
571 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
401 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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2answers
260 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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40 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
1k 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
11k 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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2answers
7k 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
1k 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. ...