set nat cgnat log-allocation
set nat cgnat pool external ext-01 external-port-range '1024-65535'
set nat cgnat pool external ext-01 per-user-limit port '2000'
set nat cgnat pool external ext-01 range 192.168.122.222/32
set nat cgnat pool internal int-01 range '100.64.0.0/28'
set nat cgnat rule 10 source pool 'int-01'
set nat cgnat rule 10 translation pool 'ext-01'

Jun 10 14:10:02 r4 sudo[9057]:     vyos : TTY=pts/0 ; PWD=/home/vyos ; USER=root ; COMMAND=/usr/bin/sh -c ' /usr/libexec/vyos/conf_mode/nat_cgnat.py'
Jun 10 14:10:02 r4 sudo[9057]: pam_unix(sudo:session): session opened for user root(uid=0) by vyos(uid=1003)
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.0, external host: 192.168.122.222, Port range: 1024-3023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.1, external host: 192.168.122.222, Port range: 3024-5023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.2, external host: 192.168.122.222, Port range: 5024-7023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.3, external host: 192.168.122.222, Port range: 7024-9023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.4, external host: 192.168.122.222, Port range: 9024-11023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.5, external host: 192.168.122.222, Port range: 11024-13023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.6, external host: 192.168.122.222, Port range: 13024-15023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.7, external host: 192.168.122.222, Port range: 15024-17023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.8, external host: 192.168.122.222, Port range: 17024-19023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.9, external host: 192.168.122.222, Port range: 19024-21023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.10, external host: 192.168.122.222, Port range: 21024-23023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.11, external host: 192.168.122.222, Port range: 23024-25023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.12, external host: 192.168.122.222, Port range: 25024-27023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.13, external host: 192.168.122.222, Port range: 27024-29023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.14, external host: 192.168.122.222, Port range: 29024-31023
Jun 10 14:10:03 r4 cgnat[9059]: Internal host: 100.64.0.15, external host: 192.168.122.222, Port range: 31024-33023
Jun 10 14:10:03 r4 sudo[9057]: pam_unix(sudo:session): session closed for user root