On Jun 12, 2004, at 12:11, Kevin Stevens wrote:

As you see, the g'way's public ip is not being used for NAT'ing internal hosts' outgoing traffic, but another ip from within the assignied public ip address range. My reading of the NAT chapter does not suggest that there is a way to define the public IP with which traffic is to be translate. Is this functionality not supported, or have I missed something when reading the various sections?

It is AFAIK, they just don't use it in the example.

Sorry, should have elaborated. This would be done by using the -alias_address option in natd, rather than the -interface option. man natd for more info.


-alias_address | -a address
Use address as the aliasing address. Either this or the
-interface option must be used (but not both), if the
-proxy_only option is not specified. The specified address
is usually the address assigned to the ``public'' network

All data passing out will be rewritten with a source address
equal to address. All data coming in will be checked to see
if it matches any already-aliased outgoing connection. If it
does, the packet is altered accordingly. If not, all
-redirect_port, -redirect_proto and -redirect_address assign-
ments are checked and actioned. If no other action can be
made and if -deny_incoming is not specified, the packet is
delivered to the local machine using the rules specified in
-target_address option below.

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