Linux - SecurityThis forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
From the internal eth0 int, i can access eth2 and eth3 - eth1 can access eth2 and eth3 and the DMZ(eth3) can only access eth2.
All the rules is already setup, but i have a minor problem with my nat.
The DMZ zone, where i have my mail, web, dns, etc servers, all this servers has a public ip, and it works fine. But when one of this servers access the internet via eth2, the servers own public ip is not shown.
The ip addy that is shown is the ip from eth2. This is not good when a DNS server connects to another DNS and wants to do an axfr, and the axfr security is setup on the servers IPs.
So, how do i get the DMZs servers IPs to be shown on the internet? Is there a nat rule that needed to be inserted once or for each ip?
Well, i must say:
Give the man a cigar
It works - tanx man...
Now i just have one more thing.
The internal eth0 172.16.0.0 network connects to the internet via eth2(gateway) and is shown on the internet with the ip addy of eth2.
If there a way to make the internal network eth0 public shown by an ip from the DMZ(eth3) or the DMZ(eth3's) ip addy, so it would not use the ip on eth2.
I have a similar problem, would be glad if someone could help me, sorry for posting this as a reply, but you 2 seem obivous choices for this subject, so here goes:
masq'ing eth1 through eth0 works great, however no traffic is masq'd from eth3 through eth2. I can ping eth3 boxes from eth2, however no eth3 box gets out. This may have something to do with the default gateway on my box, but I dont know. My Q is, how do I get eth3 + eth2 runnin the same as eth1 + eth0 ? do I somehow need to route eth3 through eth0 ?