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A NAT Destination Case

kkalaycioglu
Level 4
Level 4

Hi,

I need a nat config to alter destination address of packets coming in form the inside, traveling to the outside. Will "ip nat inside destination" command do this? As long as I know there's no "ip nat outside destination" command.

Best regards.

1 Reply 1

averzosa
Level 1
Level 1

Hi Kivanc,

Good Day! :-)

Please see below my response to your queries.

I once saw this command in a 7206 which has the ip nat outside destination command, and the IOS version is 12.2(6) with a 3DES feature set. The command "ip nat outside destination static" is a hidden and unsupported command. In this case you need to use ip nat outside source static or ip nat inside source static.

Also, I found a Bug ID that affects this command:

########################

CSCdv23427 Bug Details

Headline: Preventing incorrect inside destination static/outside dest cmds

Product: all

Component: NAT

Severity: 3

Status: Resolved

First Found-in Version: 12.1, 12.2

First Fixed-in Version: 12.2(12.5), 12.2(12.5)S, 12.2(12.5)T, 12.1(17.1), 12.2(13.3)B, 12.1(18.1)E,

12.2(15)BW, 12.2(15)BZ, 12.2(15)BX, 12.2(15)ZN Version help

Release Notes:

Blocking of "ip nat inside destination static" & "ip nat outside destination" commands to go

through.

########################

These are the other options that you can use:

ip nat outside source

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123tip1r/ip1_i2gt.htm#1079462

ip nat inside source

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123tip1r/ip1_i2gt.htm#1079180

I hope the above information helps. ;-)

Best Regards,

Ansley R. Verzosa

Review Cisco Networking for a $25 gift card