Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 489
  • Last Modified:

Configure ASA 5505 as firewall

Hello,
AT&T is installing a T1 line with a 3Com 5012. We have a ASA 5505 that was used with our DSL line. We have a block of 27 useable IP address. I need to configure the ASA 5505 for the T1. I need some help configuring this, as I don't know about the configuration of this firewall.

Thanks in advance
0
dboyle53169
Asked:
dboyle53169
1 Solution
 
JFrederick29Commented:
Here is a basic config assuming the /27 will be configured on the LAN interface of the 3Com router.

Say your /27 is x.x.x.0/27.  The router is x.x.x.1 and the ASA outside is x.x.x.2.

int vlan1
nameif inside
security-level 100
ip add 10.1.1.1 255.255.255.0
no shut

int vlan100
nameif outside
security-level 0
ip add x.x.x.2 255.255.255.224

interface Ethernet0/0                    <---the interface connected to the 3Com.
 switchport access vlan 100  
no shut

interface Ethernet0/1   <--the interface connected to your local LAN.
no shut

global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0

route outside 0.0.0.0 0.0.0.0 x.x.x.1

You can enable DHCP on the ASA if desired as well:

dhcpd dns y.y.y.y z.z.z.z    <--your ISP's DNS servers
dhcpd address 10.1.1.20-10.1.1.199 inside
dhcpd enable inside

You can use the other /27 IP's for static NAT statements if desired.
0
 
dboyle53169Author Commented:
Thank you for your help.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Increase Security & Decrease Risk with NSPM Tools

Analyst firm, Enterprise Management Associates (EMA) reveals significant benefits to enterprises when using Network Security Policy Management (NSPM) solutions, while organizations without, experienced issues including non standard security policies and failed cloud migrations

Tackle projects and never again get stuck behind a technical roadblock.
Join Now