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

learn more… | top users | synonyms

0
votes
0answers
22 views

Is it possible to set up WAN connection on a VLAN (Cisco Router)?

I'm trying to set up NAT load balancing (or failover) with two ISPs on my 1941 router. The router has only two WAN ports and 4 EHWIC ports (which are basically switch ports). One of the WAN ports is ...
1
vote
0answers
25 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 ...
1
vote
1answer
38 views

Forwarding ports after carrier grade NAT?

I cant forward ports anymore to my Xbox cause turns out my ISP recently refreshed IPs and all their IPs are public now and they say you can only forward ports if I request a static IP for a large ...
0
votes
0answers
14 views

Setting up server behind uncontrolled firewall

(Firstly, I apologize if this is on the wrong site. I am not a network engineer or a web master or anything like that.) Going off to college and my brother and I want to continue hosting a minecraft ...
0
votes
1answer
31 views

My Huawei B890 router is not accessible over the internet

It may be a beginner question but I called my service provider and the manufacturer and they have no answer for me. I want to have a remote access to my Huawei B890. On the management panel, I ...
0
votes
0answers
8 views

Networking between two VMs via host

I have two virtual machines in VirtualBox. I would like to do networking between them via my host OS. In this case they should interract only via my os. I tried NAT but I can't ping then both my OS ...
0
votes
2answers
51 views

How does a NAT differentiate between the receivers(behind it) of a packet stream?

After reading this question, I still don't understand how packets are being mapped to the their corresponding hosts(receivers) behind the NAT in the case of connectionless protocols. The accepted ...
1
vote
0answers
24 views

Most efficient way to proxy a port from one host to a port on another

I have a host with one IP address which is using port 443 (HTTPS) with one certificate. I want to run a second app on this IP address using a different certificate on a different port. To prevent ...
0
votes
0answers
15 views

virtualbox: set up a private network for my VMs

I have a few virtual machines I used to access with ssh. I set up their network configuration as Bridged and I set a static ip to them. But, as I'm moving from work to home to customer, the subnet ...
0
votes
3answers
68 views

Why do we need MAC address? [duplicate]

I have read that if we are using NAT, router knows where to send the incoming packets in the local network based on TCP/UDP port information. If this information can be used to uniquely identify each ...
0
votes
1answer
58 views

iptables - allow access to a web server from the outside

I am trying to allow access to a web server from the outside and I am getting nowhere. Granted I do not have any experience in iptables, but I have dabbled in Cisco ACL and NAT. I am not sure what I ...
1
vote
0answers
28 views

Private to private network address translation

I need a black box that will translate 192.168.1.1 to 192.168.1.2. Can a NAT router do this? The problem that I am trying to solve: I have 2 devices with identical IPs of 192.168.1.1. The devices ...
1
vote
0answers
15 views

NAT configuration for HTTP server

There is a router (192.168.1.1) having static public IP(hypothetically- 8.8.8.8). This router is programmed to forward all incoming port 80 (TCP/UDP) connections to a particular IP (192.168.1.105). ...
0
votes
1answer
56 views

How can I get rid of the double NAT in this network?

Topology: Incoming Traffic > Modem > Router > Switch > Rest of Network In this image, notice IEAS-FILESVR, incoming traffic goes to the modem/router "IEASOFFICE" into the switch, to the FILESVR ...
0
votes
0answers
22 views

Why does iptables not doing DNAT for the same subnet?

I have the following NAT setup: Whereas Host 1 has a VM with IP 10.0.0.3 and HOST 2 has a VM 10.0.0.4. The NAT box will have a NAT rule such that it changes the dest IP 172.24.4.2 to 10.0.0.4: -A ...
0
votes
0answers
46 views

How to set up NAT-less wifi hotspot with Windows 7?

I have a Windows7 and I want to use it as a wifi hotspot, but with a little bit uncommon configuration. Normal win7 wifi hotspot can be set up with some net commands, it is not a problem to me. Wifi ...
0
votes
0answers
20 views

Net-Gear router Hacked port 5000, don't no what to do [duplicate]

I have been through 4 routers already every router I get keeps getting hacked. It opens ports 5000, 80, 23, changes the firmware on my router and I can't take port forwarding off. Http & https is ...
1
vote
0answers
20 views

Item's refresh in Port Address Translation Table

When does an item is removed from PAT Table? In TCP I would say it happens when connection is closed, but I'm actually not really sure. Does NAT Device know when a table's entry will never be used?
0
votes
0answers
34 views

iptables does not redirect my HTTPS request

I configured my tables to redirect all traffic to a static IP. for ports 80, 443 + any port (NAT-DNAT redirect withour having specified ports). If I enter an IP:anyport or an url.ext, it does ...
0
votes
2answers
24 views

NAT iptables : why wrong/empty destination in saved config?

Here is rules I put in iptables : $ iptables -t nat -A PREROUTING -i wlan0 -p tcp --dport 80 -j DNAT --to-destination 19.11.11.1:80 $ iptables -t nat -A POSTROUTING -j MASQUERADE ...
0
votes
1answer
38 views

Do I need STUN?

My router has a "real" static outer IP address. Behind router's NAT there is an Asterisk server. Router is configured to forward 5060 UDP port to Asterisk machine. Do I need STUN server assuming that ...
1
vote
0answers
76 views

SIP: The other party can't hear me but I can hear them when using Asterisk

Please read carefully all the question and do not rush to a conclusion. === Test environment for point-to-point calls, without Asterisk === City1: A router with NAT and WiFi and 5060 UDP port ...
0
votes
0answers
42 views

One virtualbox linux machine act as router the for second virtualbox machine

I have 2 virtualbox machines setup with debian. The first one has 2 network adapters: NAT and Internal Network, the second one has only 1 network adapter: Internal Network. On the first one I have ...
0
votes
0answers
54 views

Virtualbox NAT port forwarding not working

I am trying to forward Growl messages from my virtualbox windows guest to the growl notifier instance on my windows host. Growl runs on port 23053. Here is my network configuration. But I'm not ...
0
votes
0answers
24 views

Automated Wifi on Raspberry Pi

I have a NAT set up, that allows my devices to bypass the MAC filter in the local dormitory router. The setup works, but since my original "nat server" has died (the HDD got fried), I had to put my ...
1
vote
0answers
38 views

Change default network settings for VirtualBox when using NAT

I'm running into an issue where VirtualBox is assigning a guest from 10.0.2/24 when using NAT mode. The problem is its a real network on this site. I see how to change the setting for a particular ...
0
votes
1answer
15 views

Incoming connection in NAT

A very basic question: As per my understanding, a machine in an external network cannot initiate a connection to a machine behind a NAT router. Is there a way I can allow this? Regards
2
votes
0answers
25 views

Simulate SNMP Trap with SNAT

I have to test SNMP 2c Traps. I want to send those traps from some computer and the trap destination has iptables. So before the trap enters the NMS, I could just rewrite the real source of the trap ...
1
vote
1answer
36 views

PS3 Ideal NAT Type

On the "Internet Connection Test" on my PlayStation 3, it lists my "NAT Type" as "Type 2." What is the ideal NAT Type and how does the NAT Type affect my games and streaming media?
1
vote
0answers
95 views

Cannot VBoxManage ModifyVM --nataliasmode1 when running

I tried to run modifyvm PS C:\Program Files\Oracle\VirtualBox> ./vboxmanage modifyvm XXX --nataliasmode1 proxyonly VBoxManage.exe: error: The machine 'XXX' is already locked for a session (or ...
0
votes
0answers
33 views

How to setup a HTTP caching proxy inside a NAT which is not a gateway?

I have the following setup of OSI level 2 and 3 devices in my IPv4-LAN with internet connection behind a NAT (all clients and servers are in 192.168.1.0/24) Internet | Gateway (WiFi-"Router")/NAT ...
2
votes
1answer
59 views

How does my computer's firewall work? Like inbound rule, outbound rule, reply?

So I understand how NAT works, but I don't understand how firewall works. With non-symmetric NAT, if someone sends me a packet, it gets blocked, but it I send someone a packet and they get that packet ...
2
votes
1answer
201 views

vpn, IP forwarding and nat

I have setup a Softether VPN on an Ubuntu 14.04 server in an aws network which has about a dozen servers using this guide. The only difference is that I have used SecureNat and softether DHCP. I can ...
0
votes
0answers
93 views

Cannot ping virtual host behind NAT port forwarding

I'm creating network between real Windows 8.1 (R) and two virtual Debian 8 (V1, V2) using VM Ware. V1 has running Tomcat and should have access only to V2 and R should redirect V2 to V1. I used two ...
1
vote
1answer
125 views

Virtualbox - how to custom NAT and port forward?

How can I use Virtualbox custom NAT and also port forward? For demos, I am running my VMs behind NAT on my laptop. If I run it in the vanilla NAT mode, then each VM I spin up automatically gets ...
1
vote
1answer
39 views

How can I configure my two routers so any device can connect to a server on any other?

Network setup: ADSL2+ modem/4-port router (SpeedStream 6520) Wi-Fi+3-port router (TD-W8960N, 4th/WAN port connected as device to modem/router) I have to admit that I know pretty much nothing about ...
0
votes
0answers
37 views

My DMZ Host on the router is not working

I am using DLink 2750u router to connect to the internet. I have connected my RaspBerry Pi to the router and set up the DMZ Host on the router. I configured ddclient on my Pi and it is working fine to ...
1
vote
0answers
61 views

Why do my nat iptables rules not work with marked packets?

System: debian squeeze, Linux server 2.6.32-5-amd64 #1 SMP Tue May 13 16:34:35 UTC 2014 x86_64 GNU/Linux, iptables v1.4.8 lsmod | grep iptable iptable_security 2176 0 iptable_mangle ...
0
votes
3answers
46 views

How do clients identify the router on a network?

How do clients connected to a LAN network with a NAT router connecting the network to the internet, identify the NAT router and hence know where to send their traffic for the wider internet. If this ...
0
votes
1answer
26 views

port forward in INPUT level

I want to change the destination port of the ipv6 packet in the INPUT level. So I tried to use ip6tables with nat in the INPUT level but seems this command does not work # ip6tables -t nat -I INPUT ...
0
votes
1answer
290 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 ...
0
votes
4answers
123 views

Point of subnets

This page gives two options for if you have more than 254 hosts, get another IP range or use subnets. But if you've got an IP address range which lets you have more than 254 hosts, why not just keep ...
0
votes
3answers
29 views

Linking 2 Linksys Wireless G Routers to have 2 separate networks

I am creating a lab for a group of people and I want to perform a miniature netwars. My plan is to have 2 wireless routers that the two teams can gain access to their respected router. How do I link ...
1
vote
1answer
28 views

How to enable miredo UPnP-Enabled Symmetric NAT Extension

I have linux mint and miredo installed on both machines. Both machines are behind symmetric NAT. Routers have UPnP enabled. Does miredo support upnp routers? How to enable UPnP-Enabled Symmetric NAT ...
0
votes
2answers
41 views

link machines which are both behind NAT via ssh tunnel

I have two machines. both behind NAT. Also I have access SERVER from each machines. Is there way to do ssh tunnel from machine1 to machine2 via SERVER? Client machines are linux mint. SERVER is ...
3
votes
2answers
320 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 ...
0
votes
3answers
61 views

Routing to sub network with local DNS

Short and clean question We has domain that can be resolved and accessed from internet as ip. On host with that ip we has NAT and virtual machines that hidden behind that NAT. How can we give access ...
0
votes
2answers
29 views

NAT how to configure with a VPN

Good morning, I'm in trouble. I need to be able to connect to my Windows PC (not locally) and I cannot open my router ports (my internet provider doesn't let me). So I've been thinking on creating a ...
0
votes
0answers
78 views

Zyxel Router Static IP setup

I need assistance with a static ip setup. The router is set up with the details for the static IP and the computer is able to browse the Internet and able to ping the static IP. The problem that comes ...
0
votes
0answers
19 views

Manage NAT using a tool

I have a Raspberry Pi on which I had previously installed Raspbian and am now installing another version on again. It is mainly used to be a test maschine for small programs and primarily as a NAT ...