Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

PAT

what is the difference between using subnet mask and not using subnet mask in PAT for global statement.i think subnet mask is not at all required if we use PAT...

3 REPLIES
Cisco Employee

Re: PAT

With PAT is doesn't matter, I personally never put it in. It's used with a NAT pool of addresses so that the PIX can ascertain the broadcast and subnet addresses in the pool and it won't allocate those.

For example, having:

global (outside) 10.1.1.0 10.1.1.255 netmask 255.255.255.0

in your configuration, the PIX will NOT use the .0 and the .255 address because it knows they're the subnet and broadcast addresses within that subnet.

Community Member

Re: PAT

what if it's global (outside) 10.1.1.0 netmask 255.255.255.0

Community Member

Re: PAT

and if it's

global (outside) 10.1.1.252 10.1.1.253 netmask 255.255.255.254 ???

108
Views
0
Helpful
3
Replies
CreatePlease to create content