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PIX 510

I have a PIX 510 Firewall Ver 4.6...OS 11.X...Does it support overload...If not how do i NAT 80 Internal Address to 8 External IP Address????......

Community Member

Re: PIX 510

try this!

assign an ip address to the outside interface

ip address outside x.x.x.1

allow inside users to be translated

nat (inside) 1 0 0

assign a separate ip address for outside translations

global (outside) 1 x.x.x.2 netmask

you could use all 7 spare addresses but it is not worth it.

version 6.3 (i think) allows you to use the same ip for both


global (outside) 1 interface outside

Community Member

Re: PIX 510

can i download 5.x or 6.x from CISCO site for no cost...cause I was told that it would cost us $1500 for the current software...I know you can download the latest version.....Does it support NAT Overload...


Community Member

Re: PIX 510

the software is not open to the public, logon required with s/ware access

possibly can get around it by buying a low level smartnet support which has software upgrades included

i would have thought that your current version supports NAT overload

the 'global outside 1' command with a single address should set NAT overload (when you enter it, it should say that it will overload to the named address)

the advantages of a later version (6 plus) is that you only need one IP address for the interface and the NAT overload address (with ver4/5 I think you have to specify different addresses still)

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