Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Ottimo_Massimo1's avatar
Ottimo_Massimo1
Icon for Nimbostratus rankNimbostratus
Jul 01, 2013

NAT configuration and Self IPs

Hi,     I guess this is a real LTM NAT 101 question, but it's been bugging me as it's the first time I've had to use NAT-specific configuration on the LTM.   We have some legacy co...
config
design
nitass's avatar
nitass
Icon for Employee rankEmployee
Jul 06, 2013
not sure if i understand question correctly. anyway, i do not think bigip uses selfip when nating.

e.g. 

root@ve10(Active)(tmos) list ltm nat
ltm nat 172.28.19.252 {
    originating-address 200.200.200.101
}

 telnet from external client (192.168.206.209) to nat ip (172.28.19.252)

root@ve10(Active)(tmos) show sys connection cs-server-port 23 all-properties
Sys::Connections
192.168.206.209:57522 - 172.28.19.252:23 - 200.200.200.101:23
-------------------------------------------------------------
  TMM           0
  Type          any
  Protocol      tcp
  Idle Time     1
  Idle Timeout  300
  Unit ID       1
  Lasthop       external 00:01:e8:d5:d4:47
  Virtual Path  172.28.19.252:23

                          ClientSide             ServerSide
  Client Addr  192.168.206.209:57522  192.168.206.209:57522
  Server Addr       172.28.19.252:23     200.200.200.101:23
  Bits In                        416                      0
  Bits Out                         0                    416
  Packets In                       1                      0
  Packets Out                      0                      1

Total records returned: 1