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

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How to configure AirPort Extreme as the DHCP/DNS/NAT server where DSL modem/router does them?

I have an AirPort Extreme BS and a modem/router (ISP's NetMaster). I want to host my own websites from my Mac Mini with OS X Server. At the moment, ISP's router is the DHCP/DNS/NAT server, and AirPort ...
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1answer
2k views

Why is my connection refused when port-forwarding?

This question is related to this: Application / Device setup for remote network connections I have a 2wire 3801HGV router and I made some firewall settings to open some ports on one of my connected ...
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1answer
257 views

NAT with IPv6 (Forced by ISP)

My ISP has recently decided that "high bandwidth clients" are now forced to use IPv6. While I can plug my laptop with Win7 directly into the modem and I have access, connecting routers or my ...
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2answers
2k views

iptables gives me and error “can't initialize iptables NAT”

I am trying to use iptables and it is giving me the following error root@vikkyhacks:~# iptables -t NAT -L iptables v1.4.18: can't initialize iptables table `NAT': Table does not exist (do you need to ...
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1answer
274 views

Home router with NAT makes internet much slower than with bridged-IP

I have a BeWAN iBox A5100 wireless router and a 100 Mbps direct internet connection (non-DSL). When I use the bridged IP option, speedtest.net reports downlink speed as 85mbps which is quite OK. When ...
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230 views

Iptables filtering and NAT with secondary IP address

I have two IP addresses on my physical eth interface. Lets say 192.168.10.7 (eth0:0) and 192.168.0.7 (eth0). So it works. But I use application, working on the only one of this addresses on port ...
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1answer
31 views

Use a PC as a one client router/switch

I have a laptop running win7 , with two network cards wifi and normal wired (RJ45). I normally use the wifi for internet connectivity (Via a personal router). I have a raspberry pi, also with a rj45 ...
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276 views

FreeSwitch - how to configure ICE, Turn, Stun, NAT traverse mode?

I have been using FreeSWITCH but some of my test users are behind very complicated network. Where default FreeSWITCH setup is not working such as: they can't register via SIP and also there are audio ...
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653 views

Disable NAT/bridge LAN to router's network

I'm at a third world country, connected to a neighborhood ISP (an ISP that serves neighboring neighborhoods) and they have some "value-added services" where they have FTP servers and Windows shares on ...
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48 views

How do I configure NAT to forward external requests?

I have three Raspberry Pi's connected to Linux machines and one computer (also a Linux machine) connected to a router which is connected to the Internet. My goal is to configure each Raspberry Pi and ...
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1answer
88 views

How do I configure NAT to forward external requests?

I have three Raspberry Pi's connected to Linux machines and one computer connected to a router which is connected to the Internet. My goal is to configure each Raspberry Pi so that they can ...
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137 views

centos 6.4 nat virtual machines not able to connect to the internet

I have two virtual machines running on virtual box. The master has one interface(eth0) bridged to the host nic(eth0) and another one connected to the internal network(eth1). This acts as a gateway to ...
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1answer
260 views

How to proxy windows TCP port (that is under NAT) via linux with public IP?

I have a server (where I am administrator) to which I can connect via MSTSC.exe from windows under NAT. server is under NAT. I have ssh and sudo rights to Linux server with public IP to open ports 2k ...
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74 views

Is it possible to communicate two networks without being dual nat?

I have two separate networks, at two different locations, each with there own internet, connected with a nanobridge(lan/lan). I have both networks set statically so that they aren't always crossing ...
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1answer
63 views

Fully NAT incoming connections while keeping masquerading working

How would you go about the following: Note: Internet access should work at all times using the classic MASQUERADE action in the nat table's POSTROUTING chain. Now the challenge: for all ...
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1answer
70 views

Redhat in VMware - adding second VNIC set up with NAT for SSH

I have had a questioned answered on a issue I was having with Hamachi VPN and connecting it to my Linux VM to use a tunnel for SSH outside my local home network. The person that answered the question ...
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1answer
88 views

How to secure port forwarding on AirPort Extreme

I have a small home server to share photos, blog, videos, etc. with family and friends around the US and Western Europe. Of course I have seen evidence of malicious scanning against my ...
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2answers
2k views

VirtualBox with Ubuntu Server guest can't ping outside

Here's my situation: an Ubuntu 12.04 Host running VirtualBox; two guest VMs running Ubuntu Server 12.04 home network, so my Host pc has a wireless connection to the router of my ISP. My problem is ...
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57 views

Cisco 861 Router forces one-to-one NAT

I have a cisco 861 router that only allows one-to-one NATs in order to access the Internet. I would like for computers to get an address via DHCP from this router, and be able to access the Internet ...
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1answer
5k views

Port Forwarding from inner network to inner network (hairpin NAT)

I've successfully setup a port forwarding on a Mikrotik router that translates every request going to WAN ip address on port 8844 (let's say: 20.20.20.22:8844) of mikrotik to the local ip address and ...
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1answer
3k views

Can't access my IP camera over the internet

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 step by step: I configured the local IP (camera_ip) and port ...
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2answers
63 views

Getting problems connecting to my server

I have a problem in my network. I have one network with 3 computers, 1 printer and 1 windows server version 2008. All computers in the network connected to the server have 192.168.1.xxx- IP addresses. ...
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1k views

Using iptables to give an LXC container a routable IP

I'm using Docker to manage LXC containers. At the moment Docker configures the underlying LXC container with host-only routing and then uses iptables/DNAT to punch holes into the container, making it ...
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3answers
821 views

Does NAT Map to the MAC Address, or to the Local IP?

I would like to set up NAT to put a service on internet using my Technicolor TG 582 router. I mention the specific router model just to have a reference, but the question goes in general as I may ...
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1answer
628 views

Route between two network interfaces with same IP address?

I would like to temporarily monitor/log/analyze what traffic is going in and out of my home. I would also like to keep my current router configuration unchanged. The router is a WiFi Home Router, so I ...
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931 views

Forwarding RDP connections with iptables

I have a workstation that runs Windows 7 as the host, and Ubuntu Server 12.04 in VMware on a bridged network. Both have their own static public IP address. However, I only have one hostname to work ...
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1answer
81 views

Should I set up NAT for computer (Steam) online gaming?

I tried Googling this and it only resulted with results about Xbox. Should I set up any settings for NAT if I plan on nearly exclusively plan on gaming with my computer? I will still watch YouTube ...
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309 views

Port Forwarding to internal device without default gateway using iptables

I need to access externally (via Internet) one device in internal network which has no default gateway configured. Just IP and Mask. The standard iptable rule to accomplish the first part of this ...
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2answers
1k views

Attach network interface to vmware nat (bridge is not working perfectly)

I have a developer computer with two physical network interfaces (NIC A and NIC B). I have VMWare workstation and several virtual machines in VMNet8 (NAT). I would like to connect my notebook to my ...
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55 views

Ubuntu machine not visible on internal network

I have the following problem. My laptop with Ubuntu can connect to my home network without any problems, but it's internal IP (10.0.0.5) is not visible to any other machine on the network. I have ...
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35 views

How to restrict RemotePort of ssh to particular ports?

Consider ssh -R '0.0.0.0:9090:localhost:5050' restricted@myvps.example.com A laptop is running a webserver on port 5050 The laptop is behind a router with NAT and port forwarding cannot be ...
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36 views

any software that can do port forwarding for me when issue with double nat present

I have modem/router from Comcast and per some diagnostic tools that Comcast modem/router is creating what is called "Double nat". I don't want to replace modem/router, don't want to put it in a bridge ...
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84 views

Is there a simple way to remotely administer devices shipped to clients?

I plan on shipping small devices (like a MinnowBoard or CuBox) to some people. Is there some sort of software package that can "phone home" so that i have a way to administer it? My current ideas are ...
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1answer
808 views

How to use DNS server behind NAT router

I have a local DNS server that I want to use, but it's behind a NAT router. For all other servers that are behind that router, I simply have an appropriate forwarding rule enabled in the router. ...
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303 views

Open ports and disable firewall from router D-link

I want to open and use the incoming ports from WAN to LAN: 443 (https), 1243 (mssql), 3306 (mysql), my firewall windows is open for out an in , I have static ip, I have the router D-link DSL 2500-E, ...
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1answer
241 views

I can't disable the firewall from my router

I have the router D-link DSL 2500-E, the simulator is here http://suporte.dlink.com.br/suporte/emuladores/ADSL/dsl-2500E/emulador/fw-dmz.htm. I want to open and use the incoming ports: 443 (https), ...
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NAT routing command in windows

Is there any specific command in windows which do the following task: I want to modify the source IP address in the packet whose Destination IP is not in the private LAN, i.e., I have a virtual ...
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1answer
71 views

issue setting up home server

Alright, I realize this isn't a professional server question, but this seemed like the most appropriate place to ask. I'm working on some web design projects and I've been dissatisfied with many of ...
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2answers
110 views

Using my laptop as a router for a VM and embedded computer?

I've got a laptop running 64-bit Windows 7 Home Premium with Ubuntu 12.04LTS on VMWare Player. Connected via a crossover cable to the laptop is a Raspberry Pi, which uses my laptop's shared internet ...
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1answer
170 views

How do I know if a NAT device is taking place on my network?

I am trying to deploy a Tahoe-LAFS grid on my machine, but other machines can't connect to mine. In the configuration doc it mentioned that a NAT device in action may need further configuration. So I ...
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1answer
2k views

How to use NAT iptables rules for hostapd

My PC is equipped with two net interfaces - wlan0 and eth0. I want to use WiFi port as access point on wlan0. So i use hostapd facility and it works properly in routing mode in local network. Users ...
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1answer
2k views

Torrent upload ratio not updated on Synology DS212+

I have a Synology DS212+ NAS running DSM 4.2-3211 (current version). I use it for several purposes including torrent download using Download Station and a tracker that needs authentication. My ...
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1answer
260 views

iptables, redirect from ip address to loopback

I have an Apache web server listening in 127.0.0.1:63280 eth0 has IP: 172.200.200.200.1, and try to connect from workstation IP 172.200.200.200 iptables -t nat -A PREROUTING -s 172.200.200.200.1 -p ...
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1answer
675 views

How to access a 3g IP camera from the outside?

I'm new here, but i've searched google a lot and this website but couldn't find anything. So here's the situation: I had no idea 3g devices could not be directly reachable from the outside. So I ...
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2answers
270 views

Enabling NAT loopback on HG556a router?

This is one of the standard issue vodafone routers. So i set up web-server on my laptop, and it is accessible to the internet now. However I need to be able to access it from my machine using the ...
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1answer
222 views

Router/NAT and IP/TCP header checksum

We know that IP/TCP has checksum mechanism to guarantee communication reliability. However, when a IP/TCP packet is relayed by router or NAT, the IP header may be modified, if if the router/NAT ...
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202 views

connecting to the internet while nat is disabled

I have four PCs, and i want to use one of them as a web server, but i still want to surf the internet from the four PCs at the same time. in Egypt we have an ISP called "tedata" which offer three ...
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2answers
215 views

Route/NAT/Port forwarding for one port only?

I'm not sure what is the correct term to use and I don't know what tools should I use. The only thing I have is a goal which I'd like to accomplish. I have two linux machines(A and B) and a remote ...
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2answers
3k views

ssh through a router without port forwarding

I have a linux server, and I want to put it in a home network behind a router. I need to ssh to this server sometime from outside, but I don't want to set up port forwarding because I don't have ...
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1answer
270 views

How to ssh my desktop(ubuntu) from outside network [duplicate]

I have set up simple ssh server by using openssh on my Ubuntu. I tried to ssh it from my Mac, which successful. But my mac is in the same subnet, which behind same router at my home. my ubunut local ...