Designing and Using DMZ Networks to Protect Internet Servers
Naturally, you want to carefully restrict traffic from the outside world to the DMZ. But it's equally important to carefully restrict traffic from the DMZ to your internal network (to protect it in the event that a DMZ host is compromised) and from the DMZ to the outside world (to prevent a compromised DMZ host from being used to attack other networks).
It goes without saying that you'll probably want to block all traffic from the Internet to internal hosts. (You may or may not feel a need to restrict traffic from the internal network to the DMZ, depending on what type of access internal users really need to DMZ hosts and how much you trust internal users.) In any event, your firewall-security policy will be much more effective if your firewall can distinguish between legitimate and phony source-IP addresses. Otherwise, it might be possible for an external user to slip packets through the firewall by forging internal source IPs.
By default, most firewalls don't have this functionality enabled (the feature is usually called something like anti-IP-spoofing. Even if your firewall supports it, you'll probably have to configure and start it yourself. It's well worth the effort, though.
|smbclient Security for Windows Printing and File Transfer||Mar 28, 2017|
|How to Calculate Flash Storage TCO||Mar 27, 2017|
|Non-Linux FOSS: Don't Drink the Apple Kool-Aid; Brew Your Own!||Mar 27, 2017|
|Three EU Industries That Need HPC Now||Mar 25, 2017|
|HOSTING Monitoring Insights||Mar 24, 2017|
|FinTech and SAP HANA||Mar 24, 2017|
- Non-Linux FOSS: Don't Drink the Apple Kool-Aid; Brew Your Own!
- How to Calculate Flash Storage TCO
- smbclient Security for Windows Printing and File Transfer
- Two Ways GDPR Will Change Your Data Storage Solution
- Returning Values from Bash Functions
- Preseeding Full Disk Encryption
- Hodge Podge
- GRUB Boot from ISO
- Three EU Industries That Need HPC Now
- HOSTING Monitoring Insights