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Mr. Gregory White
Mr. Gregory White, Professor
Category: Homework
Satisfied Customers: 5229
Experience:  M.A., M.S. Education / Educational Administration
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Firewalls and IPtables We want to build firewalls different

Customer Question

Firewalls and IPtables
We want to build firewalls for three different clients. Please turn in a typed listing
of iptable commands you would type into a terminal to build each of these firewalls. Note that often an
application protocol may be given and it is up to you to locate the ICANN port number for it.
Part I:
Our first client has an atypical LAMP server, which has the following needs:
1. mysql must be accessible from three different sites (and the server itself) which are given by the
following IP addresses:
a. 192.168.40.12
b. 192.168.40.56
c. 10.11.123.123
2. SMTP must be accessible from only the server itself.
a. All outgoing SMTP should be allowed.
3. You are going to allow HTTP, HTTPS requests from anywhere.
a. All outgoing HTTPS, HTTP should be allowed.
4. DNS requests/responses should only arrive and be sent to the following two DNS servers using only
UDP:
a. 192.168.13.3
b. 192.168.13.4
Part II:
Our second client is a linux machine serving as a router between two networks. Note that ifconfig
reveals that Ifconfig reveals that eth0 is the internal network (all depts.) and eth1 is for the external
network. For this part of the assignment, you will create user-defined chains for each department.
1. The Accounting department, which has IP addresses in the range 192.168.20/24, wants the
following traffic through the firewall:
a. HTTP traffic in/out
b. SMTP traffic in/out
c. AOLIM traffic in/out
2. The IT department, which has IP addresses in the range 192.168.25/24, wants the following traffic
through the firewall:
a. HTTP traffic in/out
b. SMTP traffic in/out
c. Microsoft Remote Desktop Protocol (only allow in)
Remember this configuration is a router! Someone in accounting may need to get to a server in the
outside network and vice versa. We can assume that only users in the department are only allowed to
surf the Web on outside servers.
Part III
Our third configuration involves a personal computer, or workstation, which has no services running on
it, and has the following needs:
1. Only allow the user to request/respond using the following services:
a. DHCP
b. DNS
c. HTTP
Submitted: 8 months ago.
Category: Homework
Expert:  Mr. Gregory White replied 8 months ago.

Hello, my name is Greg.

I see this might be time sensitive.

Do you still need this answered?

Customer: replied 8 months ago.

I fixed it over the weekend

Expert:  Mr. Gregory White replied 8 months ago.
THIS ANSWER IS LOCKED!

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