Hi,

I've configured NAT44 in lab to test it out before using it in production:

set interface nat44 in GigabitEthernet0/3/0
set interface nat44 out GigabitEthernet0/4/0

set int ip address GigabitEthernet0/3/0 10.0.0.1/31
set int state GigabitEthernet0/3/0 up

bfd udp session add interface GigabitEthernet0/3/0 local-addr 10.0.0.1 
peer-addrr
 10.0.0.0 desired-min-tx 100000 required-min-rx 100000 detect-mult 3

set int ip address GigabitEthernet0/4/0 18.46.159.2/26
set int state GigabitEthernet0/4/0 up

ip route add 10.0.0.0/8 via 10.0.0.0 GigabitEthernet0/3/0
ip route add 0.0.0.0/0 via 18.46.159.1 GigabitEthernet0/4/0

set interface nat44 in GigabitEthernet0/3/0
set interface nat44 out GigabitEthernet0/4/0

nat44 add address 18.46.159.10 - 18.46.159.20

I can see that packet is arriving to remote host as expected and host replies 
back:
*Sep 30 07:25:03.441: ICMP: echo reply sent, src 8.1.160.2, dst 18.46.159.20, 
topology BASE, dscp 0 topoid 0
*Sep 30 07:25:04.449: ICMP: echo reply sent, src 8.1.160.2, dst 18.46.159.20, 
topology BASE, dscp 0 topoid 0

But my host with private address (10.9.1.168)  doesn't see it.
Looks like VPP host doesn't translate backwards icmp.

Can someone please help?

P.S. Sorry if I post message to incorrect group.
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