Solved

network design and interface matters

Posted on 2003-10-30
4
304 Views
Last Modified: 2010-03-19
Diagram A.

subnet A ---------|
                         |                                             web server
                         |                                                      \  
                         |                                                        \
subnet B  -------router 1------ Firewall 1-------------------- Boundary router (subnet E)
                         |                                                        /                                                                               |
                         |                                                      /               |
                         |                                            mail server          |
subnet C ---------|                                                                      |
                                                                                           Firewall 2
                                                                                                |
                                                                                                |
                                                                                                |
                                                                                              router 2
                                                                                                |                                                                                                
                                                                                                |
                                                                                                |
                                                                                             subnet D

I intend to connect 3 subnets to router 1, den from router 1, connect to firewall 1.
wat would be the interface for firewall 1? i believe 1 IP will be from subnet E, how abt the other one?
0
Comment
Question by:kebeen
  • 3
4 Comments
 
LVL 35

Accepted Solution

by:
ShineOn earned 125 total points
ID: 9655697
Are the subnets A B and C all part of network D?  For example: A=10.1.1.0  B=10.1.2.0  C=10.1.3.0   A,B & C use netmask 255.255.0.0.  Interface X on router is 10.1.254.254 with netmask 255.0.0.0.  That makes the 3 subnets AB&C all part of the same higher-level network which is what that end of router1 is defined to.


Is that the scenario?

If yes, then one end of firewall 1 would be on subnet E and the other end would be on subnet whatever the heck you want to make it.  All you need to do is route what's going in and out of subnets A,B&C through the firewall 1 private interface using a route provided by router 1.  If the ABC subnets each would have a separate interface, it wouldn't matter what network or address you use for the interface between router 1 and Firewall 1 as long as you set up the routes and any NATs appropriately.

Regardless, in this diagram, one interface of Firewall 1 is going to be in the subnet E in order to connect to the boundary router.

What firewall services did you plan to provide through Firewall 1?  Proxy?  NAT?  Packet filtering?  ???
0
 
LVL 35

Expert Comment

by:ShineOn
ID: 9655701
Sorry, it should read "Are the subnets on A B and C all part of network X, with X being the "private" side of router 1?"
0
 
LVL 1

Author Comment

by:kebeen
ID: 9655800
I have a class C network.
all these subnets R all all classless. perhaps.


x.y.z are all the same........ say 140.151.23.subnet/host.

subnet A  x.y.z.a/26
subnet B  x.y.z.b/26
subnet C x.y.z.c/27
subnet D x.y.z.d/27
subnet E x.y.z.E/28

>If yes, then one end of firewall 1 would be on subnet E and the other end would be on >subnet whatever the heck you want to make it.

I have 3 subnets on the other side...... so..... must i create a new subnet just for the router n firewall?
b'coz the router interface with 3 subnets on one side.... n ?? on the other.....
while the firewall interface with subnet E on one side n ???? on the other.....
0
 
LVL 35

Expert Comment

by:ShineOn
ID: 9656211
Yes, if I understand correctly...
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question