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

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2
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2answers
937 views

VMware multiple guest systems with own VPN

I'm trying to set up a Linux box that runs multiple Windows guest systems in VMware, all of which connect through the host internet connection through NAT, but each guest using its own VPN connection. ...
1
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1answer
475 views

ddwrt not relaying external ip addres in from an external request

I have a problem where all external requests are logged or interpreted like they are originating from the router as the log shows shows the routers ip rather then the originating clients IP. I'm ...
2
votes
2answers
557 views

How does Http server distinguish between computers behind a router

HTTP servers usually operate at port 80. Yet NAT routers as most are these days assign port to outgoing requests so they would know when request is returned that which computer connected to it, it's ...
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1answer
1k views

Accessing port forwarding service from inside the network

I am running Zentyal as gateway on my network. My domain points to public ip on external interface of zentyal server. I have setup port forwarding on my zentyal server to forward all incoming traffic ...
0
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0answers
25 views

Can we capture the incoming packets of a TPLink router? [duplicate]

I wonder if we can capture the incoming packets of a TPLink WR340+ router. We want to check all packets from some specific IP. Is it possible? Steve Peng More information: ...
0
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1answer
466 views

How to connect to PPTP VPN from VBox Linux guest?

My VBox guest is Ubuntu, and the network mode is NAT. I cannot use Bridge Network mode. I tried to connect to my VPN from the guest, but failed. I can connect to the VPN on another VBox guest, which ...
2
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3answers
453 views

Virtual workstation on my dedicated server advice

I've got a dedicated webserver (debian 6) running with plenty of unused capacity. While the remaining capacity isn't used i thought it'd be nice to create a virtual machine to work on using RDP. What ...
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1answer
565 views

What is the difference between UDP hole punching and STUN? [closed]

As the title says, what is the difference between UDP hole punching and STUN? Or is it the same?
0
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1answer
34 views

internet access on natted server

I have two linux servers say X and Y. There is a VPN connectivity between the two, such that X can connect Y through some ports(e.g. 22,5901 etc) but Y can not connect X. internet is available on X. ...
3
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1answer
209 views

Run a server behind router

I own a virtual private server. I currently want to run a server on my local computer (behind a router that I don't have admin access to so I can't port forward). Can I use the virtual private server ...
3
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2answers
3k views

Using iptables SNAT based on source interface and ip address

I would like to change source ip address according to ip address and interface it came in. Let's consider following example: ----------------------------- | | | ...
0
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1answer
944 views

Host server at home behind ISP NAT using STUN

I'm hosting my own Linux server at home, which I will be using as a VPN server and web hosting if possible, problem is that I'm behind my ISP's NAT which means that I'm unable to connect to my server ...
0
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1answer
46 views

Offer IP to other end systems while behind router [duplicate]

Possible Duplicate: How can I make my home PC a web server? I am hosting a HTTP server on an end system that is behind a router. I want to offer my IP address so other people can access ...
2
votes
1answer
714 views

Subdomains for server behind NAT

I have server (ip: 192.168.1.2, openSUSE 12.2, Apache 2) behind router (ip: 192.168.1.1, TomatoUSB Toastman Build). I'm using FreeDNS (afraid.org) and I assigned subdomain (say x.afraid.org) to ...
0
votes
1answer
69 views

Can NAT capable modem/router be linked for failover?

There are a total of 7 systems on the network. The network has evolved from two small shops (3-4 computers each) to a single one with a sum total of 7 systems. Historically there were two ISP (which ...
1
vote
0answers
222 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 ...
6
votes
3answers
251 views

Two websites give different values for my IP

I just found something curious: http://whatismyip.org/ says my IP address is 82.44.14.246 http://www.whatismyip.com/ says my IP address is 31.52.118.197 I'm based in the UK and behind a router ...
4
votes
1answer
1k views

Configuration for public (external) access to ubuntu guest on ESXI 5

I am setting up a demo system on a leased dedicated server. System consists of : ESXI host with 1 NIC assigned (so 1 Static IP) 64 bit Ubuntu guest as server I installed and configured the system ...
0
votes
1answer
56 views

How to set up a network share to be always accesible while roaming?

At home I have a Raspberry Pi which I use as a NAS and torrentbox. I would like to set up a network share on it that I can access from outside my LAN so that I can stream music and video when I'm at ...
0
votes
1answer
420 views

How do you set up a VirtualBox CentOS 6.3 VM . . . in order to access it via SSH from a remote host (not host to guest)?

What should I do? I installed VirtualBox 4.2.6 I installed CentOS 6.3 It's powered on # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback ...
3
votes
2answers
3k views

Virtualbox: NAT networking suddenly stopped working for all Windows guests, Linux guests still OK

My host is an out-of-the-box Ubuntu 12.10 simply connected to Wifi. I installed VirtualBox, and then a few Linux and Windows 7 Pro guests on it, all with default VirtualBox options (NAT). I reboot ...
0
votes
0answers
457 views

Linksys WRT54G wireless router UPNP unavailable

I have UPNP enabled on my router. I found the page where it can be enabled or disabled, and it was already enabled, yet the UPNP diagnostic application I am using does not seem to show this device. (I ...
7
votes
2answers
3k views

How does the router know which device to send packets to? [duplicate]

my question does not concern how it moves through the internet, but how it moves through the router to a certain device. All devices connected to a router in a home network have the same external IP. ...
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2answers
1k 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 ...
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vote
2answers
706 views

Port forwarding with two routers and two machines

I am having issues with a specific game regarding restrictive NAT. The game is AOE online. When I try to play online matches I get a message regarding having a restrictive NAT and can not play. I have ...
1
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0answers
103 views

Netgear NAT over LAN TO LAN

I have the following question: I need to connect through a vpn IPsec lan 2 lan tunnel with a partner but they want that I connect through a specific ip subnet which is not mine. Here's the situation: ...
2
votes
4answers
3k views

How can I configure my Server 2012 Hyper-V lab setup with NAT?

I am attempting to create a lab using Windows Server 2012 (GUI) with Hyper-V on my laptop. I am trying to figure out how to create an "Internal" network with NAT through the adapter on the physical ...
7
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2answers
5k views

How is double NAT bad practically?

As the ISP-provided modem was generating pretty weak WiFi signal I've disabled its WiFi function, bought an Apple AirPort Extreme and connected it's WAN port to the modem. Now everything works just ...
3
votes
1answer
1k views

Does Guest WiFi on an Access Point make any sense?

I have a Belkin WiFi Router which offers a feature of a secondary Guest Access WiFi network. Of course, the idea is that the Guest network doesn't have access to the computers/devices on the main ...
0
votes
1answer
108 views

Accessing subnetwork inside college network

I live in an on-campus apartment at a University. I have my own subnetwork setup inside my apartment. For my main gateway I use an Apple AirPort Express and I also have an Asus RT-N12 running as a ...
0
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0answers
160 views

1:1 NAT IP address using iptables

Suppose I have 2 internal networks: 1.1.1.0/24 and 1.1.2.0/24 I would like to NAT a specific IP address from one network to the other, in which the new address would be obtained via DHCP. For ...
4
votes
3answers
388 views

Set up Linux box as WAP for MyBookLive?

I inherited an old Linux box as well as a MyBookLive and would like to make the MyBookLive available over my wireless, essentially using the Linux box as a gateway. I just wiped the Linux box (home) ...
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0answers
395 views

Routers and NAT hole punching? [closed]

I'm trying to understand why UDP hole punching works. Given peers A, B behind a NAT router and Server with port 80 open. A sends a packet to Server from port 1234. This causes the router to open a ...
0
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1answer
649 views

What am I missing to enable connection sharing on my Linux box?

I'm having problem setting connection sharing in my Slackware system. I enabled rc.ip_forward: $ cat /proc/sys/net/ipv4/ip_forward 1 And I added the next iptables rule (and I've no other rules): ...
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votes
2answers
403 views

How can I allow computers on one router to access computers on another router?

I have a lousy 3801HGV modem/router that I have to use with AT&T UVerse. Due to AT&T issues, that router does not allow the ability to change DNS settings. I have added a LinkSys E1200 as a ...
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0answers
262 views

IP forwarding with iptables

Suppose there are hosts A and B. A is allowed SSH access to B based on its IP address. Consider now another host C. C does not have access to B, but if we could route its traffic through A, then C ...
0
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2answers
211 views

isp overriding netbios

I have a Thomson TG789vn v2 router and a weird way ISP (ASK4, UK) wants me to use it. They are telling me to connect their cable to Ethernet 1 slot and disable DHCP on the router. When I do that ...
0
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1answer
990 views

Pinging an external server through OpenVPN tunnel doesn’t work

I have an OpenVPN server and a client, and I want to use this tunnel to access not only 10.0.8.0/24 but the whole internet. So far, pinging the server from the client through the tun0 interface works, ...
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1answer
136 views

PSExec tool using without authenticating to clients on same subnet

If I am using VirtualBox NAT virtual networking, will I be able to execute programs on another host in my subnet without authenticating?
1
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1answer
143 views

NAT and P2P router crash

So..i had this argument with my networks teacher. He said that some people complains about router crashes due to many entrys on NAT tables on a router. I didnt understand and i asked: "If the ...
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0answers
122 views

Hole punching over multiple ISP [closed]

I have set up my web server on my home PC used to return its client's public ip/port for TCP hole punching. As I tested, All port returned from each request(I bind socket to the same port on each ...
0
votes
1answer
212 views

ISP 5 Device Limit … again

Sorry for the delay in responding to the suggestions that were posted in my first question (ISP 5 Device Limit - double NAT the solution?). I've been travelling and have not been able to try anything. ...
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0answers
468 views

Routing table on Linux not respected

I have a very specific problem, building a Linux VPN endpoint (with external VPN Gateway), which should route certain networks over the tunnel, others via default gateway. The Linux VPN should do a ...
0
votes
1answer
338 views

domain network with DHCP + NAT

I'm configuring a virtual network on an esx server. I have a Windows Server 2008 R2 configured with these roles: - active directory domain services - DHCP server - DNS Server - Network Policy and ...
0
votes
1answer
101 views

About Wireless Router with 1:1 NAT Function

I have a old TP-Link Giga Router has 1:1 NAT Function, But does not have wifi. So to have wifi, I have two options: Buy wifi access point and connect to my current router Get a wifi router with 1:1 ...
0
votes
1answer
3k views

Can I use a gateway address on another subnet?

I've some problem connecting my virtual machine to my internet. Can I use another gateway ip address other then my subnet ip address? The gateway ip address is from my router ip address? My problem is ...
2
votes
0answers
101 views

Turning Computer into Router,Network Address Translation encryption.?

I have windows seven and am using connectify. but when i try to connect to the interner through my ethernet court in my dorm room the comp0uter doesnt recognize the ethernet cord. I belive that the ...
0
votes
2answers
100 views

Can I run a mix of static addressing and NAT?

Let's say that an ISP offers a plan with 5 static IP addresses, but I have more than 5 devices, many of which (such as a networked printer, for instance) I do not want or need to have a static IP ...
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0answers
150 views

Is there a decent diagram of packet flow for a modern era (2.6+) iptables setup?

I'm currently trying to debug a particularly hairy set of DNAT based iptables rules (the UDP reply never makes it back to the original requester) and I'm struggling to visualise the packet flow ...
1
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2answers
424 views

ISP 5 Device Limit - double NAT the solution?

I have asked this question in response to another question here ( 5 Max connections/devices to the internet? Is my ISP limiting me somehow? ), but thought I should start a thread to see if I can get ...