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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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NAT not working when using iptables with coreos

# Generated by iptables-save v1.4.21 on Sat Jun 4 12:36:07 2016 *mangle :PREROUTING ACCEPT [222:16966] :INPUT ACCEPT [222:16966] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [144:15162] :POSTROUTING ACCEPT [144:15162] COMMIT # Completed on Sat Jun 4…
0x4139
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AWS EC2 Instance with public IP address cannot be accessed from within private subnet with NAT Gateway

I setup and am using a NAT Gateway per these instructions: AWS Lambda: How to setup a NAT gateway for a lambda function with VPC access The Lambda functions using the private subnet with the NAT Gateway now seem to be able to access the Internet. So…
oliakaoil
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Proxying a port for Virtualbox NAT is inconvenient - can't I provide the host with an IP instead?

I want to be able to SSH into a VM Guest of Virtualbox where the guests are sharing a NAT Network. LocalNat Portforwarding (See https://www.pythian.com/blog/test-lab-using-virtualbox-nat-networking/ Set Up Portforwarding) is inconvenient vs. having…
Martin Cleaver
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CentOs 6 as Firewall, forward traffic from eth1 to eth0 -> destination host prohibited

I'm setting up Firewall with a CentOs 6.0 for testing. I'm doing this on two virtualmachines. First VM (Firewall) has 2 interface: eth0 - connected to NAT with 10.0.2.10, access to internet eth1 - connected to local vm network with 20.0.0.1 Second…
rul3s
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NAT'ing on Oracle Virtual Box doesnt works with static host-only IPs

I am facing the below problem on Oracle Virtual Box. Posting it here in case anyone has faced the similar issue. I have a 2 node Juno setup on Oracle VBox. I have configured one of my interfaces as NAT (For internet access, package downloads…
Manik Sidana
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2 external IP address mapped to 1 internal

Is it possible to map the same internal IP address to two different external IP's on CISCO Firewall? In the process of getting a new circuit so I would like to have them both mapped until I am ready to fully cutover.
user2078654
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How can I get SNAT to work with ARP requests using iptables?

Problem Statement I have two nodes (N1 and N2) on separate networks. They both connect to separate interfaces on a common node (Nc). I need to ping from N1 to N2. Reference: N1: IP Address 172.1.1.96/24 N2: IP Address 10.1.1.33/24 Nc: lan1…
tomcat
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Sip call drop after 30seconds

The Sip call drops after 30 seconds, but it doesn't always happen. I think it's because of NAT timeout. Am I correct? Or is it something else?
bear
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Strongswan RoadWarrior VPN-Config

I want to setup an VPN-Server for my local web traffic (iPhone/iPad/MacBook). So far I managed to setup basic configuration with CA & Client-Cert. For the moment my client can connect to the server and access server resources, but has no route to…
Boris
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How can I see what is using all my bandwidth on cisco IOS?

I have a cisco router performing NAT for my local network. Download bandwidth is stagnant at 2MB/s and I'm not sure which host is responsible for this and what exactly it's connecting to. How can I find this? Thank you.
ensnare
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ARP behind router with NAT?

Router Access Point 192.168.0.10 | 192.168.5.1................192.168.5.7<--NAT<--192.168.10.1 In this topology, the clients in the AP get translated to the internet interface which is X.X.5.7. I want the router to…
Undisputed007
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iptables nat FTP

I have computer (ubuntu server). Server have internet and share internet for local network. There is one computer in local network have FTP. How to get access to local FTP from internet?
Roman Mihno
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NAT gateway removal

There are some servers that are in private subnet and some are in public subnet. I want to remove nat gateway and make all instances that were in private subnet to get access through internet gateway. Please suggest me the procedure. When I have…
Rashmi Pandey
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NAT on Cisco Router between 2 external IP addresses

I would like to know if is possible to redirect the traffic on my network when the users try to access an external IP (let's say 20.20.20.20) to redirect them to other external IP (let's say 30.30.30.30). R1 = Router 1 R2 = Router 2 S1 = Server1 S2…
VGM
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Can not get NAT working on Cisco 2851 Router

I am trying to get a 2851 router setup using static routing and NAT. My college uses static routing, otherwise I wouldn't ;-) I can ping addresses on the internet from the router console, but not from a machine on the inside network. I can ping the…
Arana
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