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

learn more… | top users | synonyms

-4
votes
0answers
28 views

Is our home internet router a symmetric NAT? [on hold]

The question is very much as in the header. Is the NAT included in our home Internet router a symmetric NAT technology?
0
votes
1answer
24 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 ...
0
votes
1answer
30 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 ...
-4
votes
1answer
46 views

What is a router without NAT good for? [on hold]

My question is simple: What is a router without NAT good for ?
0
votes
1answer
18 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 ...
0
votes
1answer
21 views

Create Private Network based on TOR

I have a home server with deployed OpenStack and few cool services that I use, everything is inside my home network. I wanted to use this service outside the home network. I started with hamachi and ...
0
votes
0answers
18 views

UFW Ubuntu NAT with virtual interfaces setup

Trying to setup NAT on a (VPS) virtual private server. Running Ubuntu 14.04. All the guides I see mention using eth0 interfaces in the lines. Example -A PREROUTING -i eth0 -d 25.25.25.26 -j DNAT ...
0
votes
1answer
27 views

Static routes and multiple routers

I have the following set up: My office is located out of town and unfortunately I can't get fibre. Fortunately, I have a mate in town who can get fibre. He has pointed a p2p WIFI modem at my place. ...
1
vote
0answers
28 views

How best to configure my Airport Extreme and uVerse Gateway to work together?

I have AT&T U-Verse internet service. I have their 2WIRE-manufactured wireless residential gateway (RG). It's an older one, with only 802.11g support. I have lots of devices, both wired and ...
0
votes
0answers
18 views

Most efficient way to route all traffic from eth0 to wlan0

I use a Raspberry PI (model B, first generation) as a NAT router. I use a wifi usb adapter to connect to a wifi network, and route all taffic to eth0. I enabled NAT and issued the following iptables ...
0
votes
0answers
45 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 ...
0
votes
2answers
56 views

Hairpin NAT with dynamic WAN IP

I have a dynamic WAN IP so if it changes my iptables will no longer apply. Here is my working hairpin nat, where x.x.x.x is my WAN IP br0 - LAN eth1 - WAN -A PREROUTING -d x.x.x.x -p tcp --dport ...
0
votes
0answers
19 views

ISP home network PAT vs NAT

Is there an easy way to figure out whether my router is assigned an address by my ISP using NAT (Network address translation) or PAT (Port address translation)? I want to figure out if my public ip ...
0
votes
0answers
10 views

ALG IPSEC and RSTP

I have linux 3.18. my Linux is installet on a router. in this router I activate a NAT from the wan side. Does this Linux support ALG of IPSEC and RSTP ?
0
votes
0answers
8 views

pfSense does not close connections coming from LAN

I created a NAT rule that redirects external_ip:1234 of modem (pfSense itself) to 192.168.1.100:1234. I also wrote a server application which listens for connections on 192.168.1.100:1234. When I ...
1
vote
0answers
34 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 ...
0
votes
0answers
11 views

Static public IP for NAT connection

I've Installed an Apache web server on my PC. I know an Apache server can be accessed by the public IP of my computer. But in my case, I do not have a unique public IP address. Because my ISP using ...
0
votes
1answer
38 views

How to avoid Double NAT?

I have a modem/router supplied by my ISP. The optical fiber connects to it and Internet and telephone lines come out of it. Unfortunately, the DNS server settings on ISP router are fixed and cannot be ...
0
votes
0answers
20 views

no-ip and double NAT, will it work?

I have a modem router from ISP which I connect to my 2nd router. The modem router from ISP does not have bridge mode so I just put my 2nd router IP to DMZ. Topo : Internet --- Modem router --- 2nd ...
0
votes
0answers
29 views

Problems with NAT - Wireshark shows TCP Dup ACK

I'm having some issues with NATing to a couple of web servers on my site. I initially thought it was my firewall after an update (smoothwall) but I blanked it and reinstalled and its still not ...
2
votes
1answer
26 views

How to ensure, that firewall does not pass any external packets into LAN?

Am I correct thinking, that in the case of NAT and correct firewall config, one should see no any packages with "source address" equals to global IP inside the LAN? Or NAT server will keep source ...
1
vote
0answers
45 views

VirtualBox natnetwork start failed

I use VirtualBox 5.0.16_Ubuntu, Ubuntu 16.04. When I added a new NAT network and try to start natnetwork service, I got some error: ~$ VBoxManage natnetwork add --netname openstack --network ...
0
votes
1answer
9 views

How does IPsec operate in NAT environment?

I know that if you mess with IPsec header it will drop the packet and NAT is build exactly for that. How do they deploy IPsec where NAT is also needed.
0
votes
0answers
60 views

PPTP VPN connection in a (bridged) virtualbox Kali Linux 2.1 VM

im a relatively new user to linux and virtualization software such as virtualbox, so im kind of confused as to how to configure my networking settings for the vm im using (kali linux 2.1), my host OS ...
0
votes
0answers
29 views

Connection between 2 computers behind NAT

If I am A and know the IP public of B and his internal IP and B has open the port 1000 for incoming messages and I send a packet from A to B using all data i know of B, will the packet come to B? ...
0
votes
1answer
22 views

What causes this extremely strange Port Forward behaviour?

The scenario Basically, for about 10 years I lived in a country where my ISP gave me a NAT'ed address on their end (MAN). So I couldn't port forward unless I paid. However that was not an option. I ...
0
votes
0answers
42 views

Telnet to smtp.gmail.com 25 timing out inside vagrant box

Vagrant 1.8.1, Virtualbox 5.0.16, Windows 7. Vagrant using hashicorp/precise64 image. No modifications done to Vagrantfile. Using the default NAT networking. vagrant@precise64:~$ telnet ...
0
votes
0answers
13 views

Multiple hosts port-forwarding

Can I have a router-A(all hosts connected to this router) that is assigned an IP from another router-B that is connected to a WAN connection then be assigned ports that are forwarded. Would this ...
0
votes
0answers
9 views

Accessing a printer through a router, with complications

My development network is divided into production and proving. Once things are proven they are moved off to a hosting service. It used Internet service from the local ISP. So, the Internet is ...
0
votes
0answers
23 views

Multiple Clients Using Same Ports NAT

Can on a consumer grade router, say an Asus RT-66u, are you able to open multiple ports for all clients trying to access them? I've tried port triggering, but it only helps the first client that gets ...
1
vote
1answer
62 views

Making Sense of ISP's Network Topology

I recently noticed something odd while performing traceroutes from my home network, and its made me wonder as to the architecture of my ISP's network. My home network uses 192.168.0.0/16 addresses ...
0
votes
1answer
9 views

Trigger API on a Machine with private IP

I have an API server running on my local machine. I would like to trigger that API from an AWS instance. The machine's IP is assigned through NAT. Is there any way to trigger the API from outside the ...
0
votes
0answers
32 views

How should I configure my Linux kernel (running on armhf architecture) if I want to use the NAT-table in iptables?

I successfully compiled a Linux kernel (version 4.4) with nat support for my desktop computer that runs on a x86-processor. Now I want to do the same for my server which has an ARMHF processor. The ...
0
votes
0answers
25 views

Creating a local NAT behind WLAN client

I want to use my DD-WRT device as a client for an existing WLAN but I'd like to have NAT to jail some devices. For this purpose, I configured the DD-WRT like the following: LAN local ip ...
0
votes
1answer
91 views

Ajenti not accessible on Port 8000?

I have an Ajenti installation on a dedicated server on my home network, which is portforwarded to Port 8000. Using canyouseeme.org, the port shows as open, however when I try to access it using the IP ...
0
votes
1answer
61 views

iptables - kill established NAT connections

I have the following setup: PC eth0 connected to GW eth1 GW eth0 is connected to the internet. GW has net.ipv4.ip_forward=1 in sysctl.conf So, when I simply run (in GW): iptables -t nat -I ...
0
votes
1answer
128 views

How to enable NAT Loopback when modem connects to router

I want to see my hosted pages using my public address from inside and outside my network, but so far I can only from outside. The thing is that I recently changed ISP, and they brought me a ZTE-F660. ...
1
vote
2answers
70 views

Would NAT be eliminated transformed in ipv6?

NAT is a wonderful concept used in ipv4. It is the major reason for the existence on internet, in my concerns. There are no networks in the world that doesn't work without employing NAT. All I seek ...
0
votes
1answer
70 views

iptables routing of wlan0 to usb0 and usb1

Server: wlan0 (WAN) - 192.168.0.17 usb0 (LAN) - 192.168.2.15 Client: usb1 (LAN) - 192.168.2.2 wlan0 <-> usb0 <-> usb1 How do I configure a NAT to share my wlan0 internet access to my ...
0
votes
0answers
29 views

VPN and NAT access behind router

I am setting a VPN server and I am having a headache, because I can't make it work. My setup: Local LAN with 192.168.1.0 subnet behind a router. Server with two NICs in the same subnet, Internal: ...
0
votes
1answer
54 views

I need to spoof the source IP of a packet

I'm running some tests for a security project and here is the scenario. I have a SIP server (SBC) that accepts calls from a list of IP addresses. I have a SIP INVITE packet and I want to send to that ...
1
vote
0answers
46 views

Internet Connection Sharing (ICS) Port Forwarding?

When connecting my XBox One to my laptop via ICS I am able to open port 3074 required to receive an open NAT type, but other ports do not appear to open when added using the same method as 3074, using ...
0
votes
2answers
171 views

how to do port forwarding if my router wan ip is different from public ip?

I have an IP camera and i want to access it from anywhere around the world. I have configured my NETGEAR-router JNR1010 for port forwarding but the WAN IP it gives me is different from the public ip ...
1
vote
0answers
30 views

What is a simple STUN test I can perform from a Windows machine?

I want to test whether someone else's Windows machine can access a public STUN service using UDP and receive a response on its network, which I expect is behind a NAT and firewall. I do not have ...
0
votes
1answer
94 views

Forward HTTP port on mikrotik 1 to an address on another mikrotik

Trying to apply the Hairpin-nat concept on mikrotik1, my config is something like: /ip firewall nat add chain=dstnat dst-address=1.1.1.1 protocol=tcp dst-port=80 \ action=dst-nat ...
1
vote
0answers
27 views

bsd (osx) pf nat - change source port on outgoing UDP packets

I am running docker-machine on osx. docker-machine is running NAT so when my container send out a UDP packet on port 1812, NAT is translating it to some random port. I am playing around with pf nat ...
0
votes
0answers
11 views

How to obtain the proxy resolver configuration of a Virtualbox VM

Virtualbox provides two configuration flags to modify the DNS behavior of the NAT engine for a virtual machine: VBoxManage modifyvm "VM name" --natdnsproxy1 on VBoxManage modifyvm "VM name" ...
0
votes
0answers
47 views

NAT doesn't allow TCP ACK for sent TCP SYN

We are using TCP Simultaneous Open for connecting TCP socket. Lets call one SideA and other SideB. From the wireshark log I see that first two SYN sent from SideB is blocked by SideA NAT. Then SideA ...
0
votes
0answers
30 views

NAT with multiple interfaces

________ +------------+ / | | ...
0
votes
0answers
20 views

setting up a remote access between two NATted hosts for remote assistance

I need to reach remote sparse machines (ARM Linux Appliances) for maintenance and support. All these machines are Customer owned and plugged into their own private LANs (where I have no privilege), ...