1) What is Qmail & Exim?
2) Where are the Qmail Control files kept?
3) What is Bind (also know as named)?
4) A DNS Zone transfers from a Primary to a Secondary Server happen over which protocol (TCP OR UDP)?
5) DNS Queries happen on which port and what protocol?
6) In networking terms, what is a DOS and DDOS attack?
7) What is SQL Injection?
8) What is 1 of the to commands to view the routing table for linux?
9) What is MRTG used for?
10) Which sysctl settings in linux need to be set to 1 in order to enable ip forwarding?
11) If I want to block all incoming traffic from 192.168.0.50, whats the iptables rule for that?
12) if I want to search for a specific process running on a server, what command do I use?
13) What is a Layer 3 switch?
14) What would you use NATTING for in a DMZ ?
15) What is the most widely used spam filter for linux mail servers?
16) What are rootkits and where is the first place on a server you should look for them?
17) Explain what I'm doing here: iptables -t nat -A PREROUTING -d 192.12.112.168 -p tcp -m mport --destination-ports 20,21,80,443,60000:65535 -j DNAT --to-dest 192.168.0.168
18) You have already done the "make menuconfig" for a 2.6.x kernel, what is the rest of the steps to recompile the kernel & install the boot image and to get lilo to pickup the new boot image.
19) If you have a 320GB hard drive, what size should your swap partition be?
20) FTP Connection happens on port 21, what port handles the ftp-data connection and what port(s) do the files actually transfer on in Passive Mode FTP.
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