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Web Servers and Firewall Zones

Web and FTP Servers

Every network that has an internet connection is at risk of being promised. Whilst there are several steps that you can take to secure your LAN, the only real solution is to close your LAN to ining traffic, and restrict outgoing traffic.

However some services such as web or FTP servers require ining connections. If you require these services you will need to consider whether it is essential that these servers are part of the LAN, or whether they can be placed in a physically separate network known as a DMZ (or demilitarised zone if you prefer its proper name). Ideally all servers in the DMZ will be stand alone servers, with unique logons and passwords for each server. If you require a backup server for machines within the DMZ then you should acquire a dedicated machine and keep the backup solution separate from the LAN backup solution.

The DMZ will e directly off the firewall, which means that there are two routes in and out of the DMZ, traffic to and from the internet,mezitang botanical slimming gel official page, and traffic to and from the LAN. Traffic between the DMZ and your LAN would be treated totally separately to traffic between your DMZ and the Internet. Ining traffic from the internet would be routed directly to your DMZ.

Therefore if any hacker where to promise a machine within the DMZ, then the only network they would have access to would be the DMZ. The hacker would have little or no access to the LAN. It would also be the case that any virus infection or other security promise within the LAN would not be able to migrate to the DMZ.

In order for the DMZ to be effective, you will have to keep the traffic between the LAN and the DMZ to a minimum. In the majority of cases, the only traffic required between the LAN and the DMZ is FTP. If you do not have physical access to the servers,mezitang botanical slimming gel official page, you will also need some sort of remote management protocol such as terminal services or VNC.

Database servers

If your web servers require access to a database server, then you will need to consider where to place your database. The most secure place to locate a database server is to create yet another physically separate network called the secure zone,mezitang botanical slimming gel official page, and to place the database server there.

The Secure zone is also a physically separate network connected directly to the firewall. The Secure zone is by definition the most secure place on the network. The only access to or from the secure zone would be the database connection from the DMZ (and LAN if required).

Exceptions to the rule

The dilemma faced by network engineers is where to put the email server. It requires SMTP connection to the internet, yet it also requires domain access from the LAN. If you where to place this server in the DMZ, the domain traffic would promise the integrity of the DMZ, making it simply an extension of the LAN. Therefore in our opinion, the only place you can put an email server is on the LAN and allow SMTP traffic into this server. However we would remend against allowing any form of HTTP access into this server. If your users require access to their mail from outside the network,mezitang botanical slimming gel official page, it would be far more secure to look at some form of VPN solution. (with the firewall handling the VPN connections. LAN based VPN servers allow the VPN traffic onto the network before it is authenticated,mezitang botanical slimming gel official page, which is never a good thing.)

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mezitang botanical slimming gel official page

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