In computer security, a DMZ (demilitarized zone) is a physical or logical sub-network that contains and exposes services to a larger untrusted network (usually the Internet).

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DMZ Host on a router stopped working

I have a U.S. Robotics router, on which there is a DMZ Host configured. DMZ Host's IP is 192.168.1.115, which is the IP of a machine I would like to open to the Internet. This machine is connected ...
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27 views

Several Routers and DMZ, WAN, Local LAN

I previously had: A PS3 directly connected to the router given to me by my ISP (Router A). I had the console in a DMZ on this router at IP 192.168.1.33 So I had enabled UPnP for this router and ...
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Several Routers and DMZ, WAN, Local LAN

I previously had: A PS3 directly connected to the router given to me by my ISP (Router A). I had the console in a DMZ on this router at IP 192.168.1.33 So I had enabled UPnP for this router and ...
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34 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 ...
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34 views

Open Port for home server on router

I want to access home web server from internet. At last I could do by enabling my DMZ and pointing host to Local IP. My router configuration does not show up port forwarding. But I understand that ...
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56 views

Why can't my second router (in DMZ) automatically find DNS settings?

I'm trying to set up my own router after the ATT modem/router combo. There is no bridge mode to bypass the ATT router. So I set up the DMZ to point to my personal router and wasn't able to get any ...
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128 views

Public IP address port forwarding goes to my router's homepage and not my laptop’s server

I am trying to turn my laptop into an internal server to be accessed from anyone on the Internet. But whenever someone types my public IP address into their URL bar it sends them to my router’s config ...
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2answers
157 views

How do routers avoid port clashes when DMZ and NAT are used?

NAT in consumer routers makes the router translate a request from an internal device on a private IP (say dev0) and a specific source port X to a request from it's own public IP at a different source ...
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24 views

DMZ on a different router

Is it possible to set a second router as a DMZ host? Or is it much simpler to set my webserver as the DMZ host? I'm using two routers on my network and these routers are on different subnets. My ...
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2k views

Setting up a server behind Comcast Modem + Airport Time Capsule

I'm trying to set up port forwarding for a server behind an Airport Time Capsule that's behind a Comcast Arris modem. I'm trying to avoid changing the Arris modem to bridge mode, and instead using DMZ ...
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38 views

Grabbing DHCP from DMZ?

Is it possible to grab DHCP from the DMZ of a router above? Essentially i want to have a setup like this. DMZ DHCP ------> Router (master router) | | ...
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2answers
294 views

Router serving as DMZ host at the same time

My Linksys EA6700 wireless router supports DMZ. To configure DMZ I need to specify a DMZ host. As far as I understand, the DMZ host is a server which can be accessed from the Internet. As I have a ...
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Connecting to a computer inside a network [duplicate]

I have a network in my College which is connected to the internet. How can I access a system inside this network from the internet (WAN)? I don't have access to the gateway of the system, so port ...
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3k views

Asus router RT-N56U unnecessarily opens extra ports for a DMZ device

My Asus RT-N56U router (latest firmware 3.0.0.4.374_979) opens port UDP 3659 for a Playstation 3 which is already in DMZ. The DMZ was set up properly with a static IP assigned to the PS3 and the ...
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1answer
174 views

SSH to a computer in a DMZ

So here is a rough sketch of what my network currently looks like: From the .2 machine I would like to SSH into my .6 machine, however I am not even able to ping it. This all worked when I was on ...
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614 views

Cisco ASA 5520 as a home router

I have a Cisco ASA 5520 that I recently acquired from work that I am planning to use as my home router. I also have a Linksys E4200 router and a Linksys WRT610N router, both dual-band, that I would ...
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5k views

Samba - Access shares from internet

I've added my computer to my router's DMZ so all opened ports are accessible from the internet. I have a couple of Samba shares that currently have public read permission. I want all other computers ...
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894 views

DMZ forwarding on Cisco DPC/EPC2100 Cable Modem to Linksys Router for IP Cameras

I have one of the old Cisco DPC/EPC2100 Cable Modems and wanted to know if anyone has had any luck setting up DMZ on it? Link to modem: http://www.cisco.com/web/consumer/support/modem_DPC2100.html ...
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308 views

Hosting my website (IIS) 2 routers & a VMware VM involved - how to setup?

I have a modem-router from my ISP (in UK) this is a Technicolor TG582n, and a D-Link DIR-615 router. These are connected via cable, cable ends in the 'Internet' port of D-Link. I connect via Wi-Fi to ...
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1k views

Can't access DMZ host via public IP within LAN

Recently I replaced my old router with the Linksys E4200V2. I have a personal server, which is a DMZ host in my home network. I can access the server via the public IP of the router, since DMZ is set. ...
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2k views

How to setup DMZ in router with DD-WRT firmware?

I have a router d-link dir-300, flashed to dd-wrt v24. By the unknwon reasons web interface not working. Spawning in console httpd, didnt help. Now I need a DMZ ip. How I can setup it with standard ...
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439 views

Working with VLANS

So I recently bought a HP ProCurve (managed) switch to start messing around with VLAN's in a lab environment at home. I have a basic VLAN configured, two machines connected to the VLAN on 192.168.1.10 ...
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Trying to chain 4 routers together.. possible?

I have comcast 50mb internet and 3 other routers that I am trying to connect throughout my duplex house. I am running 50 ft cat5 cables to them throughout the house and have them powered on and ...
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1answer
623 views

DMZ server with a public IP

So, I'd like to run a L4D2 game server on a VM. Partially for playing and partially for training. This is a simple residential network with a DSL modem and a E4200 router (for now). The router uses ...
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SSH (sftp) Server - DMZ or Port Forwarding?

I run an SSH server on my main machine. What are the security risks here, and advantages/disadvantages to port forwarding or a DMZ? Also, is there a way to tunnel an SSH server without making changes ...
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361 views

Enabling DMZ for opening ports

I earlier asked this question. There, my problem was that I port forwarded certain ports and turned off Windows Firewall, but still, online port checkers showed that those ports were closed. So, I ...
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Why do I see router and not my real IIS?

I am trying to access IIS through web but unable to do so. Basically I have a router (which functions as router and modem) that is given by ISP and I have another router connected to the router given ...
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2answers
959 views

How is an Exchange server supposed to be seen on the perimeter network?

I have done a lot of research and I think I am on a good track, finally. I have been searching for days. I am not even sure if this is a good forum to ask this question, but all the other forums I ...
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992 views

Creating a DMZ with two routers

Hopefully it's okay to post semi-"I am learning" questions on this forum! Basically, I have two routers (both Netgear D834G's) and would like to setup a DMZ at home (merely for learning purposes and ...
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3k views

Allow access from outside network with dmz and iptables

I'm having a problem with my home network. So my setup is like this: In my Router (using Ubuntu desktop v11.04), I installed squid proxy as my transparent proxy. So I would like to use dyndns ...
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Why does my DD-WRT not accept SSH connections from my laptop?

So, here is my system: I have a 2Wire AT&T modem/router which I use for wireless and a Buffalo router flashed with DD-WRT which is physically attached to the 2Wire and set in the DMZ. I set ...
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External ping fails on Linksys router

When I try to ping my server from somewhere other than my local network, if finds the host, but returns as a lost packet. Screenshot from http://tools.pingdom.com: http://cl.ly/1I1c3K0z3Y1I2c3x3R3Z ...
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958 views

How can I make my livebox route to my external IP address for a computer in the DMZ?

I have a sagem livebox 2 (Fiber optic model), and have placed my computer in a DMZ. People from outside of my network can access my comp fine via its external dyndns.org address, yet when I try to ...
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621 views

Sharing folders on LAN with a DMZ computer on same tier (in DMZ)

This is my current setup, tiers in order; Modem Linksys wireless router D-Link wired router - wired desktop 1 - wireless laptop Wired DMZ desktop 2 Modem is connected to the linksys wireless ...
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2k views

Routing from the DMZ to the interior network only

I have a home network connected to Verizon's FIOS service. Verizon's ActionTec router is connected to the ONT via coax to establish the MOCA network. My DD-WRT router's WAN port is connected to one ...
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3answers
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How come I can't ping my home computer?

I'm trying to set up a vpn into my home computer in order to access files from wherever. I have the home computer set up with a no-ip dynamic dns program so I can always connect, and have also tried ...
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What's DMZ used for in a home wireless router?

As far as I understand, by using DMZ you expose all of the host computer's ports to the Internet. What's that good for?
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Would you setup a DMZ at home?

From a security point of view, what are the benefits of going the whole hog of setting up a DMZ at home if you plan on running a low traffic (unpopular) website from there? There are a number of ...