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

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2answers
23 views

IPTABLES - IP Restricted Port Forwarding for RDP

I can't find an answered question for this problem. I have about 7 ranges of IP address i would like to allow to RDP(port 3389) to a a server within my network. My main router uses iptables and i ...
0
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0answers
5 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 ...
2
votes
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 ...
2
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0answers
13 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 ...
0
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0answers
13 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
votes
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 ...
0
votes
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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0answers
4 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) (...
4
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1answer
199 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. ...
1
vote
1answer
32 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 ...
1
vote
1answer
52 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
votes
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 ...
0
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0answers
20 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 ...
1
vote
2answers
507 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 ...
0
votes
1answer
17 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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0answers
10 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) ...
0
votes
1answer
14 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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0answers
15 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 ...
0
votes
1answer
36 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 ...
0
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0answers
7 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
votes
1answer
46 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-...
1
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1answer
446 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
61 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
1answer
29 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
votes
1answer
69 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
8k 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
votes
1answer
56 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 ...
0
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1answer
22 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
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1answer
34 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
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0answers
33 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
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1answer
39 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. ...
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0answers
55 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 ...
1
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2answers
68 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 ...
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0answers
30 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 ...
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1answer
555 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, ...
6
votes
4answers
8k views

Why do we have NAT if we could just assign a public IP address?

If the private address block is simply used to allow the router to determine where packets can and cannot be forwarded from (because private addresses need to be unique on their own network, but can ...
0
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2answers
337 views

Trouble with NAT Type for 2 ps4's, Can't get open on both?

I have had a PS4 since release and have never had much fault with it until Call of Duty Black Ops 3 came along. I was excited to play zombies again and couldn't wait to play with friends however I ...
0
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0answers
22 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
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0answers
12 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
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0answers
10 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 ...
0
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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 ...
2
votes
0answers
347 views

Tunnelling TCP connection through NAT

My server is in my school's NAT and my desktop computer is in my home NAT. I want to SSH to my server from home. I normally used school's VPN, but recently for some reason I can't. So I'm looking for ...
0
votes
1answer
43 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
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0answers
23 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 ...
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3answers
3k views

How can I SSH into home computer from internet

I have a setup like follows I have a router that connects to the INTERNET, where my ISP provides dynamic ip two systems are connected to the router with locl ip 192.168.1.2 and 192.168.1.3 the ...
0
votes
1answer
415 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 not get ...
0
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0answers
38 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 working....
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 ...
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0answers
51 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 "192.168....
0
votes
1answer
10 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.