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

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Problems exposing a web site from behind a router

I have a D-Link DSL-2650U ADSL router for my home network. I also have my own domain server registered at dyndns.org, and I have successfully configured my router to keep [mydomain].dyndns.org ...
4
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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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1answer
3k views

pfsense with 4 WAN IP and outgoing NAT

I have a pfsense with a single wan ip, i want to assign multiple wan ip's. The pfsense machine is located on a vm machine with the other servers i wish to NAT forward. I want to give each server a wan ...
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3answers
29 views

How to configure Linux iptables to block a specific port of server?

I am trying to implement port restricted cone NAT. I want to block a specific port 3479 of server 192.168.10.102. iptables -A INPUT -i $WAN -p udp -s 192.168.10.102 --sport 3479 -j DROP iptables -A ...
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3answers
967 views

setting up the D-Link modem as a router

I have 5 computers and 1 D-Link modem that is connected to Bezeq (the infrastructure provider) All the computers and the d_link are connected to the switch. Currently only one computer is connected ...
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1answer
19 views

UDP Port Forwarding and outgoing port

For UDP, assume that an incoming port (say X) is forwarded onto a port on a local host (say Y). Does that guarantee that any outgoing traffic from port Y from the local host appears as traffic from ...
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2answers
2k 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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1answer
42 views

Can't make static route and NAT work together

My home LAN is a rather standard 192.168.2.0/24 network with gateway on 192.168.2.1 and has DHCP on addresses from 100+ configured on an ASUS router (RT-AC66U). The WAN is configured via DHCP from ISP....
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1answer
22 views

How do I disable CGN (LSN) so I can host a server?

I have figured out that inbound packets do not reach my home network due to an apparent existence of CGN. This fully inhibits my ability to host a server. I have set up everything correctly; port ...
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1answer
37 views

How to configure NAT to act as port restricted?

I am working on a project which require me to test with different type of NAT. I am using a laptop which is acting as Linux router. Due to some reason it is not able to correctly identify NAT with my ...
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1answer
40 views

How can I do DNAT and SNAT on Windows 7?

I have a very old program which uses a fixed IP address as destination. I'm trying to revamp my network into something more modern but this legacy system is holding me back. As a simple solution, I ...
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47 views

Computers can't access each other when both of them connect to Apple NAT64 hotspot

We have an iOS App on App Store. To submit a new version after Jun 1st, 2016, we have to support an “IPv6-only network” according to this link. We referred to Apple's documentation, upgraded a Mac ...
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1answer
40 views

How to route all traffic from one vm through other vm on OS X

Challenge: to get one Debian VM (Virtualbox) to route all its traffic through another Debian VM (Paralles), both hosted under OS X 10.11.5. I've tried for days, I hope you can help here. Schema: vm1 ...
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0answers
35 views

Can't get open ports for a server (possibly modem related)

I am attempting to host an Unturned server. It is running from a dedicated box on my local network. I have correctly port forwarded on my Netgear router. My modem (Thompson ST5) also has an option for ...
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3answers
319 views

Running DNS Server to circumvent NAT-Loopback issue

First I want to say that I probably read everything that there is on the internet regarding the problem. And the problem is that I can not access my owncloud over doc.selfhost.eu if I am in the same ...
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0answers
72 views

How can I communicate to multiple devices that are all at the same IP address?

I work in a manufacturing environment and I have the need to communicate with up to 50 devices that are all at 192.168.0.2 from a single (Windows) computer. Assume that I don't have the ability to ...
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1answer
750 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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145 views

no internet on centos 7 minimal virtual machine when it has a nat adapter and wireless internet connection

So, I have a lenovo thinkpad t410s. I used virtualbox and vmware. Both response the same and I think that the problem is on the laptop. When I connect the virtual machine through bridge adapter and ...
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1answer
37 views

Purpose of port forwarding

This following article talks about Network Address Translation (NAT) and port forwarding. http://superuser.com/questions/284051/what-is-port-forwarding-and-what-is-it-used-for What is the point of ...
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1answer
17 views

Exchange Server DAG and Failover Cluster with High Availability

I have 2 exchange servers (EXCH1 and EXCH2) that have Exchange 2013 on them. They are both on Windows Server 2012 R2 (Standard) machines. They are also a part of a DAG (Database Availability Group) (...
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1answer
1k views

Does Guest WiFi on an Access Point make any sense?

I have a Belkin WiFi Router which offers a feature of a secondary Guest Access WiFi network. Of course, the idea is that the Guest network doesn't have access to the computers/devices on the main ...
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2answers
512 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 ...
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9answers
167k views

How to do networking between virtual machines in VirtualBox?

I have two virtual machines in VirtualBox. I would like to do networking between them. For the moment I have the default configuration on both, but they seem to have the same IP-address 10.0.2.15. I ...
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1answer
63 views

VPN server behind a NAT without port forwarding

I installed the SoftEther VPN server on a raspberry pi which is connected via LAN behind a NAT/Firewall. The client should be an Android as well as an iOS device and should access the server from the ...
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1answer
671 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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1answer
43 views

NAT in simple home LAN

I have a simple LAN at home. The LAN-side computers have by default an access to the WAN (internet). By default i mean i didn't changed/configured anything in the modem/router connecting the LAN to ...
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2answers
24 views

Test environment post carrier-grade NAT by ISP

Today I replaced my old router with a new faster router in my home. However, this event appears to have migrated me to carrier-grade NAT'ing by my ISP. I tried with my old router but the same holds ...
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2answers
5k 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 ...
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1answer
584 views

How can I troubleshoot vmnet routing on my MacOShost and Linux guest with VMWare Fusion?

I am running a Linux guest VM on my Mac (MacOS 10.7.5) with VMWare Fusion 5.0.3. The Linux guest VM expects to have a specific IP address - 192.168.56.10 The VMs network is set to be NAT ("Share ...
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0answers
12 views

Trying to share proxy connection for my droplets on DigitalOcean

I'm using CoreOS 1010.5.0 (stable) on one DigitalOcean droplet. I have an http proxy connection setup, so that when I connect to the "outside" world, the external IP shown is not the one I have (as ...
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2answers
14k views

Can't access my IP camera over the internet

EDIT: My problem is solved, please read comments 2-5 and 8,9. I have an EasyN F3 (F3-M166) IP camera. It works fine on local IP address, but I can't access it over internet. This is what I have done ...
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36 views

Creating a poor man's DNS/name resolution with VirtualBox NAT network

I am running VirtualBox 5.0.22 on Windows 10 Pro (mikaw10) as host and have set up the following systems all with one NIC and a NAT network called unix-machines: Ubuntu 14.04 LTS 32 bit (ubuntu1404) ...
4
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1answer
267 views

Windows 10 - NAT - Port forwarding & IP masquerade

I'm looking for a way to get iptables functionality in windows 10. I enabled IP routing and I need to forward tcp data to another host (port 8080) and then forward his response while masquerading IP. ...
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1answer
72 views

Packets don't come back in a network with NAT in Cisco Packet Tracer

This is my network: I have done my best to try to solve the problem, but with no success. Whenever packets come from LAN 1 or LAN 3, the local IP addresses are translated into one of the 3 public ...
3
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2answers
5k 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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0answers
29 views

pfSense Port Forwarding using Alias Not Working

I am running a pfSense 2-3-RELEASE firewall and I am trying to set up NAT port forwarding so some development servers and my Mac. The servers (FreeBSD) have statically assigned IP's and my iMac has ...
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1answer
23 views

OSX mDNSResponder opening all ports on Billion

I recently swapped my router for a Billion 7800VDOX, and noticed some attempted connections to my iMac from external addresses. On investigation I found that a uPnP port had been opened on the router ...
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26 views

Set an OpenWRT as a Dumb AP while running 6in4 tunnel?

The computer connect to OpenWRT router through LAN port, the router connect to another router using WAN port. So it's like: Computer -> OpenWRT -> External Router(Still in private address setup) ...
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1answer
22 views

IPTables — Forwarding to Attached Client but keep source IP

Here's my scenario: I have a VPS that has two IP addresses and is running OpenVPN (IP Address of OpenVPN server: 10.1.2.1). I want to forward all received traffic on ONE address to VPN-client (10.1....
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20 views

Not all subnets in OpenWRT can access internal device via WAN

On my OpenWRT router I have such interfaces: Lan1, physical interface eth0, IP address 10.10.0.0/16 Lan2, physical interface eth1, IP address 10.11.0.0/16. Wan, physical interface eth2, IP address ...
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1answer
51 views

AWS nat instance doesn't route to the internet

I have a vpc, the vpc has two subnet, one is public to internet (10.20.7.0/24), one is private (10.20.8.0/24). In public subnet, I have a machine use aws commuity ami to create for NAT, in private ...
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15 views

UPnP NAT Traversal Custom IPTables Server

I'm looking to make a multi-subnet router at my house using a Linux box and IPTables. However, I need UPnP support for some services. From what I understand (though this is hard to find in the ...
2
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1answer
83 views

Configuring NAT on a Thomson cable modem/router

I have a simple cable modem (Thomson TWG870). I've looked in the manual, but there is no option to select the NAT type the router uses. Can I conclude that the only - and default - mode is port-...
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1answer
476 views

Is it possible to setup a NAT loopback on a router with a dynamic IP using iptables?

I've set-up a Raspberry Pi home server attached to my router. I have a dynamic IP. I can access the server within my network using the internal IP (192.168.0.8). I can also access the server outside ...
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0answers
67 views

Cisco NAT problems (Packet Tracer)

I have a little problem with my NAT configuration. When I ping 2 separated PC or laptop, the ICMP packet does not "find" the route back to the source machine. The NAT translate the IP when the ...
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1answer
54 views

NAT Port Mapping from external IP to internal Web Server not working

I am trying to setup an HTTP server using Virtual Box on my Win 10 Host. The network is being set as a bridged network on the Guest using the ip 10.0.0.254. Opening the browser with that IP is ...
2
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1answer
140 views

Why disable NAT passthrough?

According to this article NAT passthrough is a router feature enabling outbound VPN connections from LAN computers. My Asus router has NAT passthrough for three VPN protocols: PPTP, L2TP and IPSec. Of ...
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2answers
9k 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 (...
0
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1answer
83 views

Using an ADSL modem/router as modem only

I have a D-Link DSL-2520U ADSL modem router and a Netgear WNDR3700v2 router. I want to use the DSL-2520U as ADSL modem only, and the WNDR3700 for NAT, firewall, DHCP and wireless access. How I should ...
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1answer
26 views

iptables whitelist doesn't work while blacklist does

Allowing forwarding for all and blocking a set of ips work: iptables -P FORWARD ACCEPT iptables -A FORWARD -m set --match-set denied_ips src,dst -j REJECT But denying forwarding for all and ...