In computer security, a DMZ, or demilitarized zone is a physical or logical subnetwork that contains and exposes an organization's external services to a larger untrusted network, usually the Internet. The term is normally referred to as a DMZ by information technology professionals. It is sometimes ...

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2 Vlans on a Cisco PIX 515 with DMZ

I have to install an application server on a networks dmz. The application will sit on a network but has no interaction with the other devices on that network. I was thinking that the firewall(Cisco ...
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21 views

Ubuntu server - NIC suddenly loses connectivity

I'm scratching my head. I recently configured a server with two identical Intel NICs inside a DMZ. This morning at around 8:05, I successfully SSH'd in through the internal interface (via my LAN-based ...
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1answer
53 views

Can't establish a reliable VPN tunnel (ShrewSoft client / ZyWALL USG-50 firewall)

I try to setup an IPSec VPN tunnel through my firewall (ZyWall USG-50), but it doesn't work like it should. quick scheme of my installation: ME [A.B.C.D] --- **INTERNET** | ...
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0answers
61 views

Allowing LDAP authentication from DMZ to Active Directory. Is my idea secure?

I have a internet-facing application server that I want to use AD authentication. This is my first time doing this for a none MS application or without some sort of proxy. I already have a idea in my ...
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2answers
22 views

SSL certs or intermediate for DMZ

I've been tasked with deploying and managing load balancers covering internal servers and DMZ servers. I have no experience with this, and this is a first for my organization as well. Balancers are ...
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66 views

Firewall setup Huawei 4G with DMZ

Network topology: ISP1 | | Alternative ISP 4G | | | Huawei 4G with DMZ | | ...
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1answer
36 views

2 NIC vs NAT for exposing server

I'm trying to virtualize some applciation using citrix. so I have to expose the secure gateway to Internet (put it in DMZ). my question is which is better practice ? 1 - using 2 physical NIC, one ...
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1answer
47 views

LAMP server kerberos config to authenticate against a read only Windows KDC in a dmz

Background: We have a number of AD networks (domains) that are connected through VPNs and have established AD trust relationships. We have an externally hosted web server and have configured ...
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1answer
71 views

IIS Webserver hosting intranet and public sites in DMZ

We have a webserver (VM) hosting several sites. One of the applications has a part intranet and a part public. (archiving/docflow = intranet, customer invoices = public) This webserver is currently ...
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22 views

OpenSuSE server in demilitarized zone can still ping internal network?

I don't know much about setting up DMZ but from what I read in the OpenSUSE docs, putting a network interface in the DMZ zone allows reaching it from both external and internal networks while ...
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1answer
179 views

Windows Server 2012 R2 Standard located in our DMZ has problems with connection to RoDC

We had an environment with multiple 2008 R2 DC:s in our internal LAN and a 2008 R2 RoDC:s in our DMZ. We set up 2008 R2 servers in our DMZ and joined them to the domain using DJOIN. Everything ...
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1answer
47 views

Web server with access to internet and internet Active Directory [closed]

This might sound like a stupid and unsecure question, but we're front-end web delopers and don't know that much about these things. So here goes.. We're creating a web app where we want to log in ...
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1answer
25 views

Managing ServerCore 2008 R2 in DMZ

I am looking to replace our DMZ servers with Server Core editions but am struggling with remote management. The computers in the DMZ are in a workgroup while the client I am connecting from is on our ...
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3answers
96 views

Is it a good idea to only allows connections to be established in the LAN->DMZ direction?

I'm trying to setup the usual thing, with a DMZ containing servers that can be accessed from the internet, and a LAN that should be as secure as possible. I happen to also have total freedom on the ...
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1answer
69 views

Automatically ask router for port redirection on ubuntu

Is there a way to use uPnp or something to automatically ask a router/firewall to redirect data coming from outside to a machine running ubuntu? Here's the deal, I'm supposed to prepare a certain ...
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0answers
80 views

Separating Secure Network and DMZ (nonsecure) in a PCI Compliant Infrastructure

We are setting up a PCI Compliant infrastructure where most of our applications are running in a DMZ (demilitarised zone) that contain no sensitive information. The part that contains sensitive ...
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1answer
78 views

ZyWALL 2 Plus firewall make NAS public [closed]

How can I configure so that I can have access to my NAS world wide ? I tried different options but none of the combinations went successfully. FROM WAN to LAN - allow any to a specific address from ...
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1answer
306 views

Proposed Network Design for DMZ with Server Virtualization?

I have the following proposed network design that I will be implementing. All connection for server and PCs are connected through an All in One cisco firewall Only one high end server will be used. ...
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2answers
325 views

Network design vm virtualization in small office [closed]

I just recently bought a 16gb ram, Intel i7 quad core Mac mini to be used as the central point of entry to my network and am looking for advice on how to design a network suitable for a small office. ...
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1answer
148 views

VMWare Workstation and network isolation

When I install VNC or some other RAT to a container in my VMWare Workstation machine box, what ways can I prevent access to my local network and other machines on my network. Is this where setting up ...
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81 views

Freebsd routing doesn't work

My FreeBSD 9.1 has 3 interfaces: de0 - Internet 1.1.1.45 de1 - LAN 192.168.1.1 de2 - DMZ which I have just added 1.1.1.43 default gateway 1.1.1.33 I have one host on DMZ 1.1.1.42 i have ...
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2answers
218 views

Debating our network structure (DMZ, database, service)

We're trying to decide where we should locate different servers. Should we put them in the DMZ? In our trusted network zone? And so on... Lots have been written on this topic, but there seems to be ...
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1answer
181 views

iptables: Allowing only established outgoing connections like DMZ

I want to simulate a DMZ like scenario where server1(inside DMZ, 10.1.1.0) should be able to respond to any incoming connection and cann't make a new outgoing connection on its own. I would ...
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2answers
387 views

Cisco ASA5505, packet trace shows bootps and bootpc traffic is dropped on DMZ interface

As the title already states, I have a problem getting DHCPd working on the Cisco ASA5505 version 7.2 with ADSM 5.2 with the basic license. Its an older one I know, and every time I tend to forget how ...
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0answers
106 views

set DMZ server on modem that not support DMZ, using port forwarding

I have to see an application server from outside of my network, but the modem that I am using is a Zyxel P-660-HN-T1H that not supports DMZ server configuration.So, which port(s) I should forward to ...
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1answer
138 views

When moving a server from behind a firewall into a DMZ, should you move a test server first? [closed]

We have to move a server from within the firewall to a DMZ (not a true DMZ, but a space that's between 2 firewalls. Is it typically a good idea, when moving a server in this fashion, to stand up ...
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2answers
242 views

Implement a new dns server in a DMZ

I currently have a few Dns servers (ad Integrated). Internally we are using domain.local and one ISA server running DNS domains domain.com and some other .com domains. I have one server that is an ...
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2answers
461 views

how to route external IP to internal without MASQUERADE

Ok, i'm still working on creating a dmz'd http server So now I have an ethernet tunnel using ssh -w 0:0 and I have interfaces on each end which can talk to each other: previous question So now ...
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1answer
545 views

Should I dual home our webservers (DMZ/Internal network) or just do 1-to-1 NAT?

I'm setting up a rack of servers which will have 2 webservers and 10 internal servers that provide back end application support (migrating from an AWS environment). We'll have virtual machine ...
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1answer
232 views

Moving uploaded files through a DMZ

I'm transitioning a web app (runs on LAMP) from a single host to a configuration with the php/apache app running on a public facing server in a DMZ. The app connects to mysql which is sitting in a ...
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1answer
290 views

DMZ config on RV082 router

We are connecting 2 offices with a dedicated point to point connection. Both offices have the Cisco RV082 router. In both offices, the routers are being used for internet on the WAN1 port. This ...
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1answer
183 views

SMB for specific user from DMZ to internal

I've got one server in a DMZ which has limited access via SMB to another one in the internal network. A web server on that external machine needs access to a whole partition on that internal server. ...
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1answer
539 views

Subversion server behind firewall and Apache reverse proxy exhibits intermittent hanging

Here's my situation: 1) DMZ: I have an self-signed SSL Cert on an Apache server (our bastion host) configured to run as a reverse proxy for 7 other LAN servers (subversion, ldap, jenkins, ...
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1answer
877 views

Where to put OpenVPN server - DMZ or LAN?

We have a Smoothwall firewall with both a "green" network (LAN) and an "orange" network (DMZ), and we would like to use OpenVPN access server as our VPN server. The question is: Should the VPN server ...
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1answer
661 views

Setup DMZ in Pfsense with virtual servers, physical Pfsense server

I am looking for some networking tips on how to set up a DMZ in Pfsense and place some virtual servers in that DMZ. Right now my network looks like: Uverse (Static IPs) -> Pfsense -> WAN -> (Virtual ...
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1answer
1k views

VLAN security compared to DMZ

I found this question very illuminating about DMZs and when to place a server in one. We're re-organizing our internal company network (keeping the same external IPs and domains), our mainly Windows ...
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172 views

Deploying a ASP.Net WebAPI website and DMZ

I have a set of RESTful services developed using ASP.Net WebAPI which is a single project. I handle authentication via ASP.Net's built in Forms Authentication (cookie based) mechanism which is also ...
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2answers
72 views

Google Analytics: No stats from DMZ network segment

We need to track hits on a particular page for usage stats, evaluate client need, etc. More specifically we need to track an internal DMZ network segment for hits on this page. Google Analytics ...
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622 views

Internal but no external Citrix Access?

We recently had to reload our configuration of Citrix on our server Server1, and since we have, we can access Citrix internally, but not externally. Normally we access Citrix from ...
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1answer
439 views

Servers in DMZ will not communicate with each other

(Full disclosure: I rate barely above "noob" when it comes to networking.) My workplace recent got a new web server. Since we're nearing the end of an overhaul of our website, we're doing a slooooow ...
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1answer
2k views

Cisco adaptive security appliance is dropping packets where SYN flag is not set

We have an apache instance sitting inside our DMZ which is configured to proxy requests to an internal NATed tomcat instance inside our network. It works fine, but then all of a sudden requests from ...
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1answer
806 views

How to Deploy an ASP.NET Web API- and Browser-based Application to a Production Environment [closed]

(Please forgive if this is posted in an incorrect forum. We didn’t know exactly where to post it.) We have an ASP.NET Web API single page application - a browser-based app running in IIS to serve up ...
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1answer
142 views

API exposing services running on LAN to serve website in DMZ

I have a team of developers who are writing both an intranet and external website. The website consists of two servers and a load balancer, inside a DMZ. The DMZ has a pinhole open to the LAN ...
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2answers
156 views

Do I need to place a physical server/host within the DMZ to host servers/applications?

We are moving to a new office, and part is to review our current LAN/WAN and server access to/from the web. I understand how the DMZ works, but can't figure out if I need a physical server/host to be ...
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2answers
373 views

Linux - Get Outbound/Inbound Traffic by IP address

I am hosting a website and I found that the traffic on my server is quite high. My Linux server is behind a router in a DMZ. I would like to see the traffic made on my Linux box on the eth0 ...
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447 views

How to configure totally open DMZ with OpenWRT?

I have OpenWRT router. I have NAS in my LAN, which i need to access from WAN and from all computers in the LAN. So, it should be accessible from any computer and it needs to access some of them, too. ...
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1answer
83 views

How can I tell if a host is bridged and acting as a router

I would like to scan my DMZ for hosts that are bridged between subnets and have routing enabled. Since I have everything from VMWare servers, to load balancers on the DMZ I'm unsure if every host is ...
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1answer
652 views

How to place a virtual machine in DMZ?

I have an Ubuntu 12.04 server running few virtual machines with KVM. I would like to expose some of these virtual machines on the internet, to make it possible for customers to test the products ...
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4answers
259 views

Security for university research lab systems

Being responsible for security in a university computer science department is no fun at all. And I explain: It is often the case that I get a request for installation of new hw systems or software ...
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1answer
473 views

Best practices for LDAP and DMZ

We are in the process of setting up a DMZ and I have stumbled into the question of how to handle machines that need to have ports exposed to the internet, but at the same time be able to make LDAP ...