Re: NAT sample configs [7:53042]

2002-09-12 Thread Derald Sweatt

Thanks to everyone that helped.

Derald


John Huston  wrote in message
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 The Cisco site has quite a few of them.  Please refer to the URL below.

 http://www.cisco.com/warp/public/556/index.shtml

 and this URL will help you with other sample configs.

 http://www.cisco.com/public/technotes/serv_tips.shtml

 Good Luck
 Derald Sweatt  wrote in message
 [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
  I am working on a project on setting up NAT. If anyone has sample
configs
  out there. please let me know. Thanks in advance.
 
  Derald Sweatt
  CSX Technologies
  CCNA




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Re: NAT sample configs [7:53042]

2002-09-11 Thread John Huston

The Cisco site has quite a few of them.  Please refer to the URL below.

http://www.cisco.com/warp/public/556/index.shtml

and this URL will help you with other sample configs.

http://www.cisco.com/public/technotes/serv_tips.shtml

Good Luck
Derald Sweatt  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 I am working on a project on setting up NAT. If anyone has sample configs
 out there. please let me know. Thanks in advance.

 Derald Sweatt
 CSX Technologies
 CCNA




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Re: NAT sample configs [7:53042]

2002-09-11 Thread McHugh Randy

John
Here is a basic example of NAT with overload using just two interfaces and
one public IP address.

This is home set up for cable on a 2514

interface Ethernet0
 description Cable Modem
 ip address dhcp
 ip access-group 199 in
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip nat outside
 no ip route-cache
 no ip mroute-cache
 no cdp enable
!
interface Ethernet1
 description private inside network
 ip address 192.168.1.1 255.255.255.0
 ip broadcast-address 68.48.210.x
 ip nat inside
 no ip route-cache
 no ip mroute-cache
 no cdp enable

ip access-list 1 permit ip 192.168.1.0 0.0.0.255
ip nat inside source list 1 interface ethernet 0 overload

A good start for an access list for perimeter protection would be to prevent
spoofing which is to prevent any access through your public interface by
spoofed private address range
Example is 
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 199 deny   ip host 0.0.0.0 any log
access-list 199 deny   ip any host 0.0.0.0 log
access-list 199 deny   ip host 10.1.1.1 any log
access-list 199 deny   ip 127.0.0.0 0.255.255.255 any log
access-list 199 deny   ip 169.254.0.0 0.0.255.255 any log
access-list 199 deny   ip 172.16.0.0 0.15.255.255 any log
access-list 199 deny   ip 192.168.0.0 0.0.255.255 any log
access-list 199 deny   ip 224.0.0.0 31.255.255.255 224.0.0.0 31.255.255.255
log
access-list 199 deny   ip any 255.255.255.0 0.0.0.255 log
access-list 199 permit ip any any

Also to forward ftp or web traffic to certain private address you would use
a forward list something like this

ip nat inside source static tcp 192.168.1.4 80 interface Ethernet0 80

There is bunch of other stuff you can do with access lists to permit or deny
certain types of traffic. If you want more examples please let me know.
HTH
Randy







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RE: NAT sample configs [7:53042]

2002-09-11 Thread Bernard

Derald,

Please feel free to download my freeware Mentor from my website and
use it for this purpose. It takes you step-by-step through NAT (static 
overload) and much more. Screenshot of the software is also posted
there.

http://www.networkking.net

Bernard







 

 
 I am working on a project on setting up NAT. If anyone has sample
configs
 out there. please let me know. Thanks in advance.
 
 Derald Sweatt
 CSX Technologies
 CCNA




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NAT sample configs [7:53042]

2002-09-10 Thread Derald Sweatt

I am working on a project on setting up NAT. If anyone has sample configs
out there. please let me know. Thanks in advance.

Derald Sweatt
CSX Technologies
CCNA




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