Questions tagged [dmz]

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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Router Causing PHP: Warning: file_get_contents failed to open stream: Connection timed out error

I have Worked out what is causing the issue but I don't know what I need to do to fix it. I updated the parent router and my code stopped working. figured it was just a new IP issue so fixed that but ...
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FireZilla Ftp server Cant Connect externally [duplicate]

I have an FTP server issue and I think that the main problem is my router. The facts: A) Main desktop Windows 10 with IIS server which has a website and a Microsoft SQL server Static Ip 192.168.1.100 ...
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NServiceBus to send messages to queue outside of dmz

I'm migrating a legacy system to a new server. This system sends NServiceBus messages from within it's DMZ to a server outside the DMZ (inside the company network). I cannot use a domain account (...
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Can I use the ISP modem/router as only a modem? and LAN-to-WAN to another modem/router?

My ISP forces us to use their modem/router. The provided modem/router is a custom NETGEAR VEGN2610 Telco gateway. I want to manage my LAN, WiFi & QoS using my previous modem/router: a D-Link DVA-...
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DMZ how it works

I am very novice in Networking so hear me out please. I plan to setup the DMZ in my router and expose my CCTV Camera so it is accessible over the internet. My question is the DMZ not inside the ...
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Why would SSH specifically not work through either a DMZ or port forwarding?

I have a number of ports forwarded from an Ubuntu 20.04 machine that is behind an Arris (Comcast) cable modem/Wi-Fi router. I am using the Wi-Fi subnet. The 9993 works fine but the [SSH] 222 does ...
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DMZ and 2nd router

I have an ISP provided router modem (BT Smart Hub TypeA) that everyone at home connects to (wifi and cabling) and I want to leave this as is, so it remains as the DHCP, using 192.168.0.x/255.255.255.0 ...
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279 views

Isolate one computer on the LAN from all other computers on the LAN

I would like to know how I can best and most readily set up a single PC on my network such that it cannot see any of the others PCs or access any of their resources. The PC must still be able to ...
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293 views

Port forward or DMZ not working on tp-link archer a7 ac1750

i have minecraft server on a old pc with debian, portforward in the router doesn't work i also tried DMZ but not works, 2 months ago port forward works, today i changed my lan ip address and subnet ...
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Trying to run a local server with port forwarding behind a carrier grade network from ISP, but getting no connection with localhost

i'm trying to make a half life server by portforwarding trought my router. It didn't work, i checked it out, and my public IP and my WAN IP were different, then i realised that i was in a carrier ...
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Difference between DMZ and VLAN

I would like to know the difference between a DMZ and a VLAN (either a private or community VLAN). It would be wonderful if you could help me out! Thanks in advance!
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Should I use DMZ for a public NextCloud server hosted on a home network?

I would like to set up a small NextCloud installation on a Raspberry Pi 1 Model B+, or something like that, on my home network.I would like it to be accessible from the outside with a DNS of some sort....
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686 views

DMZ to another router for WAN IP

I have 2 ISPs (One I am getting rid of -- Bell Canada). The first provider is Bell Canada and they use PPPOE and is connected via DSL and it's a modem/router in one. The second provider is Rogers ...
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379 views

OpenVPN server on DMZ router

I am stuck with the ISP modem/roter and I want to use a second router with VPN capabilities, but I cannot get the OpenVPN server to work. Please do not suggest to put the first router as bridge as I ...
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DMZ vs Port Forwarding

We're a medium sized company and working with a vendor who requires us to set up a server. The connection to this server is from a list of fixed IP addresses in the cloud. They have only required the ...
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How to expose a home PC behind CG-NAT using a VPS?

Previously I had my home workstation PC directly exposed to the internet simply by setting it as the DMZ PC in my router's settings, and I could access any services I was running on it: SSH, Web ...
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356 views

DMZ (Portforwarding) in OpenVPN

I am running an self-hosted openvpn server with few clients. I want to expose 1 client to the external network, how can I do that? I see similar option in paid admin panel, but I'm using the free ...
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How to setup Home Networking DMZ Using Two Routers

I decided to get a better router than using my ISP supplied modem/router.  Thus I am not interested in using my new router as access point nor bridge mode.   I prefer having two internet accessible ...
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DMZ Network terming confusion [closed]

I have a question regarding the correct term and meaning of a DMZ network. We have in our company the following network stack: Internal Clients network 192.168.0.0/24 we call it company LAN Server ...
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How can I determine who is blocking port 25 from the internet?

I'm flummoxed. I've bought a domain name through 'freehostia.com' - and I've setup the MX records to point to my DDNS based local SMTP/POP3 server which I'm running on a Synology NAS box. I've ...
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Pass port traffic from home router > pfsense VM > gaming server

I want to setup a gaming server on a physical host I have at home. I am having trouble passing traffic through my home router to the pfsense VM, to the gaming host. My network looks like this: Home ...
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DMZ vs Port-Forwarding [closed]

In some ISP(s) new routers the DMZ option is absent In this cases I sometimes solve the problem Redirecting all ports (1-65535) as VirtualPorts to the intended DMZ machine (Port-Forwarding) What ...
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Why can't I reach SSH from my public IP but random hacker-bots can?

I have a Raspberry Pi3 with Raspbian Stretch that is behind a home router. /var/log/auth.log in the RPi consistently shows failed login attempts with generic usernames (root, operator, webmaster, and ...
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separating two networks with DMZ?

I am a college student wanting to get into server and networking but I have an issue I need help with at home. I asked a question about a year ago about creating two separate networks with the same ...
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764 views

Does DMZ direct traffic to its target even if initiated by another computer inside LAN?

Suppose my setup looked like this: Router 1 connects to the Internet (i.e. the modem). Router 2's WAN port connects to a LAN port of Router 1. (I.e. Router 2 is a 'router behind router' with its own ...
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175 views

Single-sign-on in DMZ / OpenLDAP

we have a dmz with several https-based services, which users from internal network use although as users from outside. To ensure authentification with the active directory user-credentials, we set up ...
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868 views

DMZ to LAN. SMB Print and File Sharing not working

I have a Windows Server 2008 r2 machine on DMZ. We have a shared folder on there that one day a couple weeks ago was no longer able to be accessed. No changes occurred except for maybe windows ...
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131 views

App having access to dynamic IP DMZ host in home network

I have a set of Dahua home cameras connected to my home network. The router is one provided by my ISP. Now after creating on the router a DMZ host from the cameras' recorder I am able to get live ...
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192 views

Can I setup one router (modem) for ethernet internet only and another router for Wifi only on the same network?

The Goal: To be able to only turn on the WiFi only when we need it while having continuous access to internet via ethernet (hard-wired). I've found a Bluetooth controlled outlet that I can plug the ...
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2k views

Home network: DMZ or not?

Router: Asus RT AC-66U Setup: Router, IP 10.0.0.1 Apache2 server, IP 10.0.0.2 Clients etc., IP 10.0.0.X Virtual servers: All traffic on port 80 forwarded to 10.0.0.2, port 80. Pretty simple setup. ...
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170 views

Is a forwarded port vulnerable to exploit if there is no software listening for connections on that port?

Does forwarding a port to a device (or DMZing the device) mean the device is susceptible to prodding on the opened ports even if no software listening to those ports is running on the device? e.g.: ...
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Setting up honeynet behind DSL router

I have setup double honeynet for capturing polymorphic worms as shown in the figure. The whole setup is in Virtual environment on a single host. I want all the traffic to reach the internal router ...
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DMZ - Active Directory - (Philosophy)

I have searched all over and found a lot of different answers to my question with no real direct Yes or No. I made a very crude network diagram to explain what I would like to setup. I have setup a ...
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2k views

cannot access my web server after setting up a DMZ with my mobile broadband router

I am trying to open my web server to the internet in order to give some friends a view on my on-development websites. Since I gave up trying with the port forward way (my ISP is probably not allowing ...
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478 views

Difference between placing a server behind a DMZ vs directly behind a WAN

My ISP provides a block of 5 IPs. I have an 8 port switch that my ISP is connected to, and one of the ports goes to my Ubiquiti Edgerouter to provide Internet access to my home PCs. I recently ...
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969 views

connect 2 different lan's for internet access and DMZ

i got 2 routers one has ip address like 192.168.1.1 and is connected to my ISP's fast internet access My ISP does not provide me with static ip services so i bought static ip vpn service from ...
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Is it safe to add a router to a modem without bridge mode by using DMZ?

I cannot alter my modem firmware and there's no legal way to enable bridge mode. I want to add a router so that I can have complete control over the network. If I use DMZ to achieve this, how secure ...
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Can a server in a DMZ pose a security risk to the rest of the network?

I'm on the road a lot for work so and I was thinking I might take an old laptop and set up some VM labs to play around with on it that I can access when I'm away from home. It would just be a ...
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Configuration of DMZ on LRT214

I want to learn more about network technology. Therefore I want to run a raspberry pi in the DMZ as a web server. What is working: Appache Server on the pi is working. When I use it in the LAN and ...
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284 views

Layer-2-Accessible DMZ: ebtables?

I'd like to make a network topology where all the IoT devices (printer, DVR, thermostat, BluRay player, etc) are all in a DMZ and the rest of my devices are all on the LAN. Note that the usage of DMZ ...
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134 views

I am not able to connect my software with my public IP

please help me in port forwarding. i m stuck in the middle. suppose my local ip is - 192.168.0.103 and public ip is - 49.248.xx.xxx I have D-link DSL-2520U ADSL2+ modem router so here is what i do, i ...
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NTP not getting through even to DMZ

My home router seems to be blocking UDP 123. sudo ntpdate -u time.apple.com works as expected, but sudo ntpdate time.apple.com I get: "no server suitable for synchronization found" I can get a ...
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Two playstations on one network

In my house I have 2 playstations. My wife and I both play together. On all sort of games but mostly on call of duty. Recently we have been playing Black Ops 3 and have been having problems. We have ...
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Do I need to port forward if I'm using a DMZ?

It seems like if I set a computer up as a DMZ to host, say, a Minecraft server, then I'd still need to port forward. Otherwise how will the router know which local computer to send them to when they ...
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Most secure: Port Forwarding Vs DMZ for SOHO scenario

In a small office / home office (SOHO) scenario, I would like to configure the ADSL router for a small http server installation - actually an experiment with a Raspberry Pi, working as an http server. ...
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Squid reverse proxy, DMZ, how to forward any non-http request

I'm actually facing an issue with some network-protocol related problem. I have my own domain, a owned DMZ, and externals users. In my DMZ, I have a reverse proxy who handle HTTP connection very well....
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839 views

Double NATing Issues and DMZ Solution?

I just wanted to put this out there to make sure I am understanding everything correctly around double NATs in an apartment building and if my solution is sound. So I just moved to an apartment ...
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520 views

Port 80 forward on home router

I have a generic Linux home router. I can change iptables on it by telnet to console. Currently, it is set up to forward all incoming connections to machine on my internal network, using something ...
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194 views

Router behind the switch (DMZ)

I am new to the world of networking and am having a hard time to solve this issue. I want to access my server from outside by configuring the server IP in DMZ host but it is not giving me access from ...
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294 views

I think my ISP is blocking acsess to my server outside my network [closed]

My friend gave me a nice desktop computer. I decided to install Ubuntu server and use it as a server. I have a ssh server, web server,minecraft server, and sometimes a team speak server running on it. ...