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Questions tagged [nat]

Network Address Translation (NAT) is a method of connecting multiple computers to the Internet (or any other IP network) using one IP address.

Network Address Translation (NAT) is a method of connecting multiple computers to the Internet (or any other IP network) using one IP address.

NAT is also known as IP masquerading.

RFC 2663 - IP Network Address Translator (NAT) Terminology and Considerations

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AWS EC2 Instance unable to use NAT Gateway

I has setup my AWS with VPC NAT gateway, subnet, Route Table as below diagram http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-nat-gateway.html The different is my private subnet are create EC2 instance instead of Database Servers. My…
vincentleekp
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udp hole punch and port restricted cone NAT，

I would like to understand how udp hole punching works when two hosts each behind the port restricted cone NAT establish connection. As I understood, it happens in several stages and involves three hosts. Host A and host B are behind the port…
Yuming
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iptables command to bridge openstack virtual network

I successfully installed openstack on spare server using the ubuntu single-node installer script. The openstack status page on the underlying ubuntu instance is green across the board. From the host ubuntu instance I can ping / ssh to all of the…
user1943819
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Blocking the to-destination with NAT and iptables

I have the following configuration: ServerA: 192.168.168.200 ServerB: 172.23.10.10 They are separated by a RedHat box I'm trying to configure as a NAT device. The box is configured as follows: eth0: 172.23.10.1 eth1: 192.168.168.254 eth1:0:…
BenH
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How NAT handles return traffic

There is a Static NAT rule that achieves the following. (for the question, let's assume the WAN subnet has a subnet of 1.1.1.1/24) Inbound traffic to the WAN interface on port X to 1.1.1.6 gets NAT'ted to LAN IP 192.168.0.1. Now this isn't a 1-1 NAT…
PnP
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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 network. But I can access it from inside the…
doc
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How to add an IP address to NAT table (Linux Debian) - POSTROUTING chain

I would need to add an IP address to na NAT table in Linux Debian, with accept policy. I have no idea how to NAT an IP address...
Patak
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twilio - using a local (behind NAT) HTTP server

The Twilio quick-start pages refer to an HTTP server by FQDN. Great - but most people are probably developing behind NAT.
Carl Binding
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How to change the window 445 port

my host OS is window7; my guest OS is centos7 is runing on virtualbox; i hope share centos7's files for window7 via samba server; the samba server is runing in the centos7; when centos7 connect network with "Bridged networking" or "Host-only…
qidizi
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Docker/Boot2Docker: How to run multiple instances of a same container without port forwarding?

I have a container that listens to port 8080. I want to spin up 3 instances of the same container on the same host without having to do port forwarding. I want to access each of the instances using a unique IP. I am running Docker via Boot2Docker…
ChaitanyaBhatt
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Cisco IP forwading challenge on a cisco router

I have been trying to setup a cisco gateway router that has a Mail server behind it. The challenge has been that the static nat entries are no effective or perhaps do not work. Has anyone done this in areal life environment? testing for open ports…
Chico Ahmad
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Allow NAT from single external address - Mikrotik

I have an RB951G-2HnD that I'm trying to create a rule to allow 1143 through from WAN to a particular server on the LAN. I've created a rule, but I want to limit access to 1143 to a single external IP address. Any tips on how I can limit it to a…
emike09
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VMware and iptables

Is there a problem using VMware on Windows to host a virtual linux box running iptables? I have a configuration that seems to work on physical hardware but is flaky under VMware. I'm using VMware to run a virtual linux 2.6.24 machine on a Windows…
Adam Liss
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Can not download/install after forwarding port 80 on NAT server, still can ping to google

I use AWS create 1 VPC (10.0.0.0/16) have 2 subnet and create 2 EC2 Instance, 1 NAT Instance (10.0.1.1) on Public Subnet (10.0.1.0/24) and 1 WebService Instance (10.0.2.1) on Private Subnet (10.0.2.0/24). I setup everything ok but have problem when…
Amida
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Asterisk - access PBX from internet

I'm behind a firewall with NAT, I can connect from my remote extension and call from LAN to remote, but not reverse. If I call from remote to LAN, nothing happen. I've forwarded those ports: - SIP 5060 - RTP 10000-20000 client get registred…
user2239318
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